Functional code converter angle in the sine - cosine voltage

 

(57) Abstract:

The invention relates to computer technology and can be used in automatics and information measuring technique. The technical result is to increase the accuracy of the conversion and expansion of the functionality of the Converter. The device has two digital to analogue Converter, voltage reference, four cumulative element is performed on the capacitor, the pulse generator, counter, element is NOT, two registers, the functional unit conversion code corner code of sine and cosine, four keys, two subtractive amplifier, two modulator and a threshold unit. 2 Il.

The invention 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 and.with. The USSR, 324704, CL N 03 To 13/03, 1970).

The disadvantage of this Converter is low performance and large hardware costs.

The most effective is containing (see patent 1826837, CL H 03 M 1/66, 1991) d / a Converter, whose input is connected to the output of the voltage reference, and digital inputs connected to the output of the operational storage device, and the output is connected to the information input N-channel switch with decoder whose outputs from the first to the n-th connected to respective inputs of buffer repeaters and the first plates of capacitors, the second obladi are combined and connected to the bus zero potential, the outputs of buffer repeaters are respectively output bus of the inverter, the information input random access memory device is a first input bus of the inverter, and the address input is combined with the first Manager of the input N-channel switch with decoder and is connected to the output of the counter information input which is the second input bus of the inverter, and the input "permission settings" combined with the input element and the third input bus Converter, the output element is NOT connected to the input resolution "account" counter input write random access memory device and the second managing input N-channel switch with decoder, the output GEWISTA.

The disadvantage of the Converter are low accuracy due to the offset and drift of zero in the path of the digital to analog conversion, as well as its limited functionality.

The purpose of the invention is improving the accuracy characteristics of the transducer and extending its functionality.

This objective is achieved in that in the code Converter-voltage containing the first digital to analog Converter, an analog input which is connected to the output of the voltage reference, four cumulative item performed on the capacitors, some of the plates are United and connected to the bus zero potential, the pulse generator, the output of which is connected to a counter input counter input "account" which is connected to the output element, the input of which is connected to synchronou Converter, input a second d / a Converter, the functional block of code Converter angle in the code of sine and cosine, first, the second third and fourth keys, the first and second subtractive amplifiers, the first and second modulators, the threshold unit, the first and second registers, data inputs, the first of which is the entrance to the ode records of the joint and is connected to the input mute the output of the first register and the input element, and the outputs are combined and connected to the input of the functional unit conversion 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 second digital to analog converters, analog input of the second of which is connected to analog input of the first digital to analog Converter, the first output of the meter is connected on the controlling input of the first key and the second output with the control input of the second key and with the input of the direct/inverse second register, input disable output of which is connected to 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 the other plate of the first capacitor and the second subtractive input of the first amplifier and the other plate 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 with the first subtractive input of the second amplifier and the other facing the second condense and second subtractive amplifiers connected respectively 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.

Structural functional diagram of the code Converter angle in the sine-cosine voltage is shown in Fig.1, the timing diagram of its operation is shown in Fig.2.

Functional code Converter angle in the sine-cosine voltage contains the first 1 and second 2 registers, item 3, block 4 function code conversion angle in the code of sine and cosine, the first 5 and second 6 d / a converters, the source 7 of the reference voltage generator 8 pulses, the counter 9, the first 10, second 11, the third 12 and fourth 13 keys, the first 14, second 15, the third 16 and fourth capacitors 17, the first 18 and second 19 subtractive amplifiers, the first 20 and second 21 modulators, the threshold unit 22.

The information inputs of the first 1 of the register are input code angle Converter, informational inputs 2 second register connected to the bus zero potential, recording inputs of the first 1 and second 2 registers combined soedineniya, the output element 3 is connected to the input mute the output of the second 2 register control inputs of the third 12 and fourth 13 keys and entry permission account of the counter 9, the output of generator 8 pulses is connected to the counting input of the counter 9, the first output of the counter 9 is connected with the control input of the first 10 key, the second output of the counter 9 is connected with the control input of the second 11 key and entry direct/inverse" 2 second register, the outputs of the first 1 and second 2 registers are combined and connected to the input of the unit 4 functional transformation code corner code of sine and cosine, source output 7 of the reference voltage is connected to the analogue inputs of the first 5 and second 6 digital to analog converters, digital inputs of the first 5 and second 6 digital-to-analogue converters connected respectively with the first and second outputs of block 4 function code conversion angle in the code of sine and cosine, the output of the first 5 digital to analogue Converter is connected to the inputs of the first 10 and third 12 keys, the second output 6 digital to analogue Converter is connected to the second inputs 11 and 13 fourth key, the output of the first 10 key connected to the first input of the first 18 subtractive amplifier and one of oblada first 14 is ladok 16 third capacitor, the output of the second 11 key connected to the first input of the second 19 subtractive amplifier and one of the plates of the second capacitor 15, the output of the fourth 13 key connected to the second input of the second 19 vypitogo amplifier and one of the plates 17 fourth capacitor, the other plates of the first 14, second 15, the third 16 and fourth capacitors 17 are United and connected to the bus zero potential, the outputs of the first 18 and second 19 subtractive amplifiers respectively connected to information inputs of the first 20 and second 21 modulators, the outputs of the first 20 and second 21 modulators are respectively the outputs of the sine and cosine voltages of the Converter, the input threshold of the block 22 is the reference input variable reference voltage of the Converter, the output of the threshold unit 22 is connected to control inputs of the first 20 and second 21 modulators.

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

Input code corner of NWHcoming from an external device on the leading edge of the respective signal recordingiwritten in the first 1 register, which is also the second 2 case zero value is written to casopisiisupplied also to the input disable output of the first 1 of the register, its outputs are set to the third (high-impedance) state, and outputs the second 2 register signal recordingipassing through the element 3 (a), are connected to the input unit 4 functional transformation code corner code in sine and cosine. By the same signal from the output element 3 () includes the translation mode of the counter 9, the counting input of which receives the clock frequency output from the generator 8 pulses. First time on a signal from the first output of the counter 9 (see Fig. 2), corresponding to the "LOG.1", closes the first 10 key, while the signal from the second output of the counter 9, corresponding to the "LOG.0" and input "direct/inverse" 2 second register and a control input of the second 11 key 2 second register included in the direct mode of delivery of the information and its outputs are, respectively, in the zero state, which corresponds to the anglei= 0and the second 11 the key is in open condition. Unit 4 functional transformation code corner code in sine and cosine form on its first and second outputs codes Nsini= 0and Ncosi= 0i= 0namely:

< / BR>
where Uop- the reference voltage source 7;

n is the number of bits of the d / a converters 5 and 6;

U1U2- voltage offset and drift of the zero potential in the paths of the first 5 and second 6 digital-to-analog converters, respectively.

The voltage U1with the release of the first 5 d / a Converter through a closed first 10 key memorized in the first condenser 14 and the voltage (Uop+U2with the release of the second 6-analog Converter is disabled, because the second 11 the key is open.

In the next moment of time when the second output of the counter 9 a signal corresponding to the level of the LOG.1", closes 11 second key, the second 2 register switches the P>
and the first 10 key opens, since the first output of the counter 9 at this time is a signal corresponding to the level of the LOG.0".

Unit 4 functional transformation code corner code in sine and cosine forms on their outputs codes Nsini= 90and Ncosi= 90respectively, which, as in the first case, proceed to the digital inputs of the first 5 and second 6 digital-to-analogue converters. In the result of the multiplication of the reference voltage source 7, is applied to the analog inputs of the first 5 and second 6 d / a converters corresponding to the codes applied to the digital inputs, the outputs of the last received voltage proportional to the sine and cosine of the angle i= 90namely:

< / BR>
The voltage U2with the release of the second 6-analog Converter through a second closed 11 key stored on the second capacitor 15, and the voltage (Uop+U1with the release of the first 5 digital to analog Converter is disabled, because the first 10 key open.

Thus, during the pulse time write Cithe first 14 and second 15 capacitors remembered voltage U1youversion.

At the end of the pulse write Cithe inverter changes in operating mode, i.e. the signal through the element 3 () outputs the second 2 register are set in the third (high-impedance) state, and the outputs of the first 1 of the register are connected to the input unit 4 functional transformation code corner code in sine and cosine. By the same signal from the output element 3 () close the third 12 and fourth 13 keys, and the first 10 and second 11 keys are open by the control signals from the first and second outputs of the counter 9. Unit 4 functional transformation code corner code in sine and cosine transforms of the input code, recorded from an external device in the first 1 register, the code of sine and cosine, and the first 5 and second 6 d / a converters perform the operation of multiplication of the reference voltage source 7, is applied to analog inputs, digital codes applied to the digital inputs from the output of block 4 function code conversion angle in the code of sine and cosine, respectively, in result we have:

< / BR>
The voltage outputs of the first 5 and second 6 digital-to-analogue converters through the closed third 12 and fourth 13 keys act accordingly to one of the inputs of the first the voltage U1and U2stored on the first 14 and second 15 capacitors. As a result, the output of the first 18 and second 19 subtractive amplifiers receive:

< / BR>
The voltage outputs of the first 18 and second 19 subtractive amplifier receives information inputs of the first 20 and second 21 modulators, which according to the signal output of the threshold block 22 is formed at its outputs a voltage proportional to siniand cosiin the form of a square wave with a frequency of the reference voltage at the input of the threshold unit. The third 16 and fourth capacitors 17 are used to maintain the output voltages proportional to the sine and cosine of an angle, at the time of recording/correction input NWH.

Thus, introduction to functional code Converter angle in the sine-cosine voltage, the first and second registers, the second digital to analogue Converter, the functional unit conversion code corner code of sine and cosine, the first, second, third and fourth keys of the first and second subtractive amplifiers, first and second modulators and the threshold unit greatly to improve the accuracy characteristics of the Converter and to expand its functional howl first d / a Converter, analog input which is connected to the output of the voltage reference, four cumulative item performed on the capacitors, some of the plates are United and connected to the bus zero potential, the pulse generator, the output of which is connected to the counting input of the counter, the input resolution "account" which is connected to the output element, the input of which is connected to synchronou Converter, characterized in that it introduced the second d / a Converter, the functional unit conversion code corner code of sine and cosine, the first, second, third and fourth keys, the first and second subtractive amplifiers, the first and second modulators, the threshold unit, the first and second registers, information inputs, the first of which are the reference input code of the angle of the transducer, the information second inputs connected to the bus zero potential, the input records are United and connected to the input mute the output of the first register and the input element, and the outputs are combined and connected to the input of the functional unit conversion 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 second digital to analog the Converter, the first output of the counter is connected with the control input of the first key and the second output with the control input of the second key and entry direct/inverse second register, logon, disable the output of which is connected to 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, the other plate of the first capacitor, the second subtractive input of the first amplifier and the other plate 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 with the first subtractive input of the second amplifier, the other plate of the second capacitor, the second subtractive input of the second amplifier and the other plate of the fourth capacitor, the outputs of the first and second subtractive amplifiers connected respectively 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 of the joint is of the Converter.

 

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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

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