Angle-code-to-sine/cosine-voltage functional converter

FIELD: computer engineering; automation, data processing and measurement technology.

SUBSTANCE: proposed converter has two registers, NOT gate, angle-code-to-sine/cosine-code functional conversion unit, two digital-to-analog converters, reference voltage supply, pulse generator, counter, two capacitors, subtracting amplifier, two modulators, threshold unit, two selector switches, two buffer followers, threshold voltage supply, comparison circuit, D flip-flop, and reference code shaper; all these components enable functional control of converter during recording pulse time and supply of signal indicating normal or abnormal operation of converter to user thereby essentially raising its self-control ability and yielding profound and reliable information.

EFFECT: enhanced comprehensiveness of control and reliability of converter output data.

1 cl, 2 dwg

 

Izobretenie relates to the field of computer technology, in particular to the code converters in voltage, and can be used in data processing systems.

Known Converter code-voltage containing a source of reference voltage, a resistor divider R-2R, transistor switches and summing amplifier (see A.S. USSR №324704, CL N 03 To 13/03, 1970).

The disadvantage of this Converter is low performance, large hardware costs and the lack of Autonomous control in the process.

Closest to the invention to the technical essence and the achieved result is a functional code Converter angle in the sine-cosine voltage adopted for the prototype and contains (see patent No. 2196383, CL H 03 M 1/66, 2001) the first and second registers, information inputs, the first of which are the reference input code of the angle of the transducer, the information inputs of the second is connected to the bus zero potential, recording inputs - the joint, is connected to the input "disable output" of the first register, the input element and is synchronator Converter, and outputs - combined and connected to the input of the block functional transformation code corner code of sine and cosine, the first and second outputs of which are connected respectively to the digital inputs of the first and the WTO the CSO d / a converters, analog inputs are combined and connected to the output of the voltage reference, the output of the pulse generator is connected to the counting input of the counter, the first output of which is connected with the control input of the first key and the second with the control input of the second key and with the input of the direct/inverse second register, logon, disable the output of which is connected to the input resolution "account" counter, with control inputs of the third and fourth keys and is connected to the output element, the inputs of the first and third keys are combined and connected to the output of the first d / a Converter, and outputs connected respectively to the first input of the first subtractive amplifier and one of the plates of the first capacitor and the second subtractive input of the first amplifier and one of the plates of the third capacitor, the inputs of the second and fourth keys are combined and connected to the output of the second d / a Converter, and outputs connected respectively to the first input of the second subtractive amplifier and one of the plates of the second capacitor and the second subtractive input of the second amplifier and one of the plates of the fourth capacitor, the second plates of the first, second, third and fourth capacitors are combined and connected to the bus zero potential, the outputs of the first and second subtractive amplifier is connected is uceni accordingly to the information inputs of the first and second modulators, the outputs of which are respectively the outputs of the sine and cosine voltages of the Converter, and the control inputs are combined and connected to the output of the threshold unit, the inlet of which is the reference input variable reference voltage of the Converter.

The disadvantage of the Converter is the lack of Autonomous control in the process and, as a consequence, low reliability issued by the transducer information.

The purpose of the invention is the improved depth control and authenticity issued by the transducer information.

This objective is achieved in that the functional code Converter angle in the sine-cosine voltage containing the first and second registers, information inputs, the first of which are the reference input code angle Converter, recording inputs - the joint, is connected to the input "disable output" of the first register, the input element and is synchronator Converter, the output element is NOT connected to the input of the "disable output of the second register and to the input of the "account" counter, the counting input of which is connected to the output of the pulse generator, the outputs of the first and second registers are combined and connected to the input of the block functional transformation code corner code of sine and cosine, the first and second outputs which is connected respectively to the digital inputs of the first and second digital to analog converters, analog inputs are combined and connected to the output of the voltage reference, some of the plates of the first and second capacitors are combined and connected to the bus zero potential, the outputs of the first and second modulators are respectively the outputs of the sine and cosine voltages of the Converter, and the control inputs are combined and connected to the output of the threshold unit, the inlet of which is the reference input variable reference voltage of the Converter, the subtractive amplifier entered the first and second switches, the first and second buffer repeaters, source threshold voltage, the comparison circuit, D-trigger and driver reference code, the outputs of which are connected to information inputs of the second register the inputs of the first and second switches connected respectively to the outputs of the first and second digital to analog converters, and control inputs combined and connected to the output element, the first outputs of the first and second switches respectively connected to the input of the first buffer repeater and to the other plate of the first capacitor and to the input of the second buffer repeater and to the other plate of the second capacitor, the outputs of the first and second buffered repeaters connected respectively to the information inputs of the first and second modulators is that the outputs of the first and second switches connected to the subtractive inputs of the amplifier, the output of which is connected to one input of the comparison circuit, the other input of which is connected to the source output threshold voltage, and the output is connected to one input of D-flip-flop, another input of which is connected to the output of the counter, and the output is the output of the health of the Converter.

Structural functional diagram of the code Converter angle in the sine-cosine voltage is shown in figure 1, the timing diagram of his work - in figure 2.

Functional code Converter angle in the sine-cosine voltage contains the first 1 and second 2 registers, shaper 3 reference code item NO 4, block 5 functional transformation code corner code of sine and cosine, the first 6 and second 7 d / a converters, the source 8 of the reference voltage, the pulse generator 9, the counter 10, the first 11 and second 12 switches, subtractive amplifier 13, the comparison circuit 14, the source 15 of the threshold voltage, the D-flip-flop 16, the first 17 and second 18 capacitors, the first 19 and second 20 buffer repeaters, the first 21 and second 22 modulators and the threshold unit 23.

The information inputs of the first 1 of the register are input code angle Converter, informational inputs 2 second register connected to the output of the shaper 3 reference code recording inputs of the first 1 and second 2 registers are combined, connected with I the house "off exit 1 of the register, the input element 4 and is synchronator Converter, the output element 4 is connected to the input "disable output" 2 second register, entry permission account of the counter 10 and to control inputs of the first 11 and second 12 switches, the outputs of the first 1 and second 2 registers are combined and connected to the input unit 5 functional transformation code corner code of sine and cosine, the first and second outputs of the functional block 5 code conversion angle in the code of the sine and cosine respectively connected to digital inputs of the first 6 and second 7 digital to analog converters, analog inputs of the first 6 and the second 7 digital-to-analogue converters combined and connected to the source output 8 of the reference voltage, the output of the pulse generator 9 is connected to the counting input of the counter 10, the output of the first 6 digital-to-analogue Converter connected to the input of the first 11 switch, the second output 7 digital to analogue Converter connected to the input of the second switch 12, the first output of the first 11 of the switch connected to the input of the first buffer 19 repeater and one of the plates of the first capacitor 17, the first output of the second switch 12 is connected to the input of the second buffer 20 repeater and one of the plates of the second capacitor 18, the other plates of the first 17 and second 18 of the United capacitors and p is clucene to the zero potential bus Converter the outputs of the first 19 and second 20 buffer repeaters are connected respectively with the information inputs of the first 21 and second 22 modulators, the outputs of the first 21 and second 22 modulators are respectively the outputs of the sine and cosine voltages of the Converter, the control inputs of the first 21 and second 22 modulators are combined and connected to the output of the threshold unit 23, the input of the threshold unit 23 is input AC reference voltage of the Converter, the second outputs of the first 11 and second 12 switches connected to the subtractive inputs of the amplifier 13, the output of the subtractive amplifier 13 is connected to one of inputs of the circuit 14 comparison, the other input circuit 14 comparison connected with source output 15 of the threshold voltage, the output of the circuit 14 comparison connected with one of the inputs of D-flip-flop 16, the other input of D-flip-flop 16 is connected to the output of the counter 10, and the output of D-flip-flop 16 is the output of the health of the Converter.

Functional code Converter angle in the sine-cosine voltage is as follows.

Input code corner Nx.i received from an external device on the leading edge of the corresponding recording signal Ci is recorded in the first 1 register, which is also the second 2 the register is written, the code value corresponding to the corner α(FL.)=45°from shaper 3 reference the code is. At the same time according to the recording signal Cisupplied also to the input "off exit 1 of the register, its outputs are set to the third (high-impedance) state, and the recording signal Ci that has passed through the element 4 (Ci), the outputs of the second 2 of the register are connected to the input unit 5 functional transformation code corner code of sine and cosine, and the outputs of the first 6 and second 7 digital-to-analogue converters through the first 11 and second 12 switches are connected to the inputs of subtractive amplifier 13. As the input unit 5 functional transformation code corner code in sine and cosine enters the code of the angle corresponding to the corner α(FL.)=45°on its first and second outputs will be generated codes angles: Nsinαi=45° and Ncosαi=45°respectively, which are sent to the digital inputs of the first 6 and second 7-analog converters, respectively, to the analog input of which receives the voltage UOP. from the source 8 of the reference voltage. The first 6 and second 7-analog converters perform the operation of multiplication of the reference voltage DII., attached to their analog inputs, the corresponding codes attached to their digital inputs. In the result of the conversion on the outputs of the first 6 and second 7-analog converters receive:

where the DCI. - the reference voltage source 8;

n is the number of bits of the first 6 and second 7 digital-to-analogue converters.

Nsinαi=45° and Ncosαi=45° - codes respectively sine and cosine of an angle α(FL.)=45°generated by unit 5 functional transformation code corner code of sine and cosine, which is coming to the subtractive inputs of the amplifier 13.

Because when the angle α(FL.)=45° the code value of the sine of an angle is equal to the code value of the cosine of the angle, and if all devices of the Converter is working properly, the voltages at the outputs of the first 6 and second 7-analog converters and, accordingly, on the subtractive inputs of the amplifier 13 must also be equal, ie:

and then the value of the voltage at the output of subtractive amplifier 13 should be minimal or zero, i.e:

The voltage output from the subtractive amplifier 13 is supplied to the first input of circuit 14 comparison to the second input of which receives small value of the threshold voltage from source 15 threshold voltage. If the result of comparison of the voltage at the output of the subtractive amplifier 13 is smaller than the threshold voltage from a source 15, ie:

the output of the circuit 14 when Anania will be generated signal, according to the level of "log.0", which corresponds to the proper operation of the transducer, and if the result of comparison of the voltage at the output of the subtractive amplifier 13 is greater than the threshold voltage from a source 15, ie:

the output of the circuit 14 comparison generate a signal corresponding to the level "log.1", which corresponds to the faulty operation of the Converter.

The signal from the output element 4 (Ci) mode conversion of the counter 10, the counting input of which receives the frequency from the output of the pulse generator 9. The signal from the second output of the counter 10 (see Figure 2) result schema 14 comparison rewritten into D-flip-flop 16, which stores and outputs to the external device, information about good/bad inverter operation.

In the next moment, at the end of the recording signal Ci, the Converter goes into operational mode, i.e. the outputs of the first register are connected to the inputs of the functional block 5 code conversion angle in the code of sine and cosine, and the output element 4 (Ci) outputs 2 second register set in the third (high-impedance) state and outputs the first 6 and second 7 cyfranogwyr converters through the first 11 and second 12 switches respectively connected to the input of the first buffer 19 is of authorites to one of the plates of the first capacitor 17 and to the input of the second buffer 20 repeater and one of the plates of the second capacitor 18.

In accordance with the code value of the angle input unit 5 functional transformation code corner code of sine and cosine, the latter generates at its first and second outputs respectively codes sine and cosine of the angle Nsinαi and Ncosαi that arrives at the digital inputs of the first 6 and second 7-analog converters, to the information input of which receives the reference voltage from source 8 of the reference voltage. The first 6 and second 7-analog converters perform the operation of multiplication of the reference voltage DII., attached to their analog inputs, the corresponding codes attached to their digital inputs. In the result of the conversion on the outputs of the first 6 and second 7-analog converters receive:

where the DCI. - the reference voltage source 8;

n is the number of bits of the first 6 and second 7 digital-to-analogue converters.

Nsinαi and Ncosαi - codes respectively sine and cosine of an angle αi, generated by the block 5 functional transformation code corner code in sine and cosine.

The voltage outputs of the first 6 and second 7 digital-to-analogue converters through the first 11 and second 12 switches and through the first 19 and second 20 buffer repeaters respectively arrive at the inputs of the first 21 and second 22 modulators, the cat is that the output signal of the threshold device 23, arriving at their control inputs, generates at its output a voltage in the form of a square wave that is proportional to the sine and cosine of an angle.

The first 17 and second 18 capacitors are used to maintain the output voltages proportional to the sine and cosine of an angle, at the time of signal recording (control good/bad inverter operation).

Thus, introduction to functional code Converter angle in the sine-cosine voltage driver reference code, the first and second switches, the first and second buffered repeaters, source threshold voltage, the comparison circuit and the D-flip-flop allows you to increase autonomy, depth control and authenticity issued by the transducer information.

Functional code Converter angle in the sine-cosine voltage containing the first and second registers, information inputs, the first of which are the reference input code angle Converter, recording inputs of the first and second registers are combined and connected to the input "disable output" of the first register, the input element and at the same time are synchronator Converter, the output element is NOT connected to the input of the "disable output of the second register and to the input of the "account" counter, the counting input of which is connected to the output of the pulse generator, Vihterpalu and second registers are combined and connected to the input of the functional block code conversion angle in code of sine and cosine, the first and second outputs of which are connected respectively to the digital inputs of the first and second digital to analog converters, analog inputs are combined and connected to the output of the voltage reference, some of the plates of the first and second capacitors are combined and connected to the zero potential bus Converter, the outputs of the first and second modulators are respectively the outputs of the sine and cosine voltages of the Converter, and the control inputs are combined and connected to the output of the threshold unit, the inlet of which is the reference input variable reference voltage of the Converter, subtractive amplifier, characterized in that it introduced the first and second switches, the first and second buffer repeaters, source threshold voltage, the comparison circuit, D-trigger and driver reference code, the outputs of which are connected to information inputs of the second register, the inputs of the first and second switches connected respectively to the outputs of the first and second digital to analog converters, and control inputs combined and connected to the output element, the first outputs of the first and second switches respectively connected to the input of the first buffer repeater and to the other plate of the first capacitor and to the input of the second buffer repeat what I and the other plate of the second capacitor, the outputs of the first and second buffered repeaters connected respectively to the information inputs of the first and second modulators, the second outputs of the first and second switches connected to the subtractive inputs of the amplifier, the output of which is connected to one input of the comparison circuit, the other input of which is connected to the source output threshold voltage, and the output is connected to one input of D-flip-flop, another input of which is connected to the output of the counter, and the output is the output of the health of the Converter.



 

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SUBSTANCE: proposed converter has two registers, NOT gate, angle-code-to-sine/cosine-code functional conversion unit, two digital-to-analog converters, reference voltage supply, pulse generator, counter, two capacitors, subtracting amplifier, two modulators, threshold unit, two selector switches, two buffer followers, threshold voltage supply, comparison circuit, D flip-flop, and reference code shaper; all these components enable functional control of converter during recording pulse time and supply of signal indicating normal or abnormal operation of converter to user thereby essentially raising its self-control ability and yielding profound and reliable information.

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