Functional transformer of angle code to sine-cosine voltages

FIELD: computer engineering, in particular, functional transformers of angle code to sine-cosine voltages, possible use in data processing systems.

SUBSTANCE: device contains block for functional transformation of angle code to code of sine and cosine, generator of impulse pack, NOT element, registers, support voltage source, digital-analog converter, switch, capacitors, buffer repeaters, modulators, threshold block.

EFFECT: increased precision of transformation.

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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 A.S. USSR №324704, CL. NC 13/03, 1970).

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

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 RF patent №2246175, CL. NM 1/66, 2003) 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 outputs of the shaper reference code 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 to the control inputs of the first and second switches and to the input of the "account" counter, the counting input of which is connected to in the course of the pulse generator, the outputs of the first and second registers 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 inputs are combined and connected to the output of the reference voltage, and outputs connected to the inputs of the first and second switches respectively, the first outputs of the first and second switches respectively connected to the input of the first buffer repeater to one of the plates of the first capacitor and to the input of the second buffer repeater to one of the plates of the second capacitor, the other plates of the first and second capacitors United and connected to the bus zero potential, the outputs of the first and second buffered repeaters 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, the second outputs of the first and second switches connected to the subtractive inputs of the amplifier, the output of which is connected to onomous inputs 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.

The disadvantage of the Converter is low accuracy due to the use of its two digital to analog converters having, as a rule, significant variation of electrical parameters from case to case.

The purpose of the invention is improving the accuracy characteristics of the Converter.

This objective is achieved in that the functional code Converter angle in the sine-cosine voltage containing the first and second registers, inputs the records are merged and are simultaneously synchronator Converter, the output element is NOT connected to the input of the "disable output of the second register, the output of a source of reference voltage connected to the analog input to analog Converter whose output is connected to the input switch, the first output switch connected to the input of the first buffer repeater to one of the plates of the first capacitor, the second input buffer repeater is connected to one of the plates of the second capacitor, the other plates of the first and second capacitors of the United and connected to the bus nulog the potential the outputs of the first and second buffered repeaters 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, the functional unit conversion code corner code in sine and cosine entered shaper pulse packet, the input of which is connected to synchronou Converter, and the output is connected to the input element and to the input of the "disable output" of the first register, the outputs of the first and second registers are combined and connected to the digital inputs digital to analogue Converter, and informational inputs connected respectively to the first and second outputs of the functional block conversion code corner code of sine and cosine inputs which are input code angle Converter, the second output switch connected to the input of the second buffer repeater, and the shaper pulse packet contains a counter and a pulse generator, the output of which is connected to the clock input of the counter, the input set initial state which is the input of the shaper pulse packet, and the output is vicodintramadol pulse packet.

Structural functional diagram of the code Converter angle in the sine-cosine voltage is shown by figure 1, block diagram of the shaper pulse packet - figure 2.

Functional code Converter angle in the sine-cosine voltage contains the unit 1 functional transformation code corner code of sine and cosine shaper 2 packs of pulses, item 3, first 4 and second 5 registers, the source 6 of the reference voltage, d / a Converter 7, a switch 8, the first 9 and second 10 capacitors, the first 11 and second 12 buffer repeaters, the first 13 and second 14 modulators, the threshold unit 15, the pulse generator 16 and the counter 17.

Unit 1 functional transformation code corner code in sine and cosine are the input code of the angle of the transducer, and first and second outputs connected to information inputs of the first 4 and second 5 registers, respectively, the inputs of the first 4 and second 5 United registers, connected to the input of the shaper 2 packs of pulses and at the same time are synchronator Converter, the output of shaper 2 packs of pulses connected to the input element 3, with the entrance with the sign "disable output" of the first 4 registers and control input of the switch 8, the output element 3 is connected to the input "disable output" of the second 5 register, the outputs of which, I can pay tithing 4 and second 5 United registers and is connected to the digital inputs of the digital-analog Converter 7, analog input digital to analogue Converter 7 is connected to the output of a source 6 of the reference voltage, the output of the digital to analogue Converter 7 is connected to the input of the switch 8, the first output of switch 8 is connected to the input of the first buffer 11 repeater and one of the plates of the first capacitor 9, and the second output of switch 8 is connected to the input of the second buffer 12 of the repeater and one of the plates of the second capacitor 10, the other plates of the first 9 and second 10 capacitors combined and connected to the zero potential bus Converter, the outputs of the first 11 and second 12 buffer repeaters are connected respectively with the information inputs of the first 13 and second 14 modulators outputs the first 13 and second 14 modulators are respectively the outputs of the sine and cosine voltages of the Converter, the control inputs of the first 13 and second 14 modulators are combined and connected to the output of the threshold unit 15, the input of the threshold unit 15 is an input variable reference voltage transducer and the imaging unit 2 packs of pulses includes a pulse generator 16 and the counter 17, the output of pulse generator 16 is connected to a clock input of the counter 17, the entrance set the initial state of the counter 17 is the input of the shaper 2 packs of pulses, the output of counter 17 is the output of the Fort is iroutes 2 pulse packet.

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

Input code corner of NI.αifrom an external device to the input of unit 1 functional transformation code corner code of sine and cosine, the first and second outputs which will be generated codes sine of Nsinαiand cosine of Ncosαiconvert angle, respectively, which are on the leading edge of the corresponding recording signal Ci are recorded respectively in the first 4 and second 5 registers. At the time, equal to the duration of the recording signal Ci and the corresponding level "log.1", shaper 2 packs of pulses will be in the initial state, i.e., the counter 17 shaper 2 packs of reset pulses and the time between successive recording signals Ci and Ci+1, when the input of the shaper 2 packs of pulses present level "log.0", the latter produces a pulse sequence, i.e. the frequency of the pulses in the form of a meander, level "log.0" which to the digital inputs d / a Converter 7 is connected to the outputs of the first 4 registers, i.e. the code of the sine of Nsinαiconvert angle, the outputs of the second 5 register output element 3 are installed in the third (high-impedance) state, and the switch 8 is in the source (decree is nom figure 1) position connecting the output of the d / a Converter 7 to the first 9 storage capacitor and to the input of the first buffer 11 repeater. D / a Converter 7 performs a multiplication operation of the reference voltage Uod.applied to its analog input, the code on the sine of Nsinαiconvert angle from the digital inputs from the output of the first 4 registers. The result is multiplied by the output of the digital to analogue Converter 7 is formed a voltage proportional to the sine transform of angle

which is memorized in the first 9 storage capacitor.

The presence of level "log.1" pulse sequence shaper 2 packs of pulse outputs of the first 4 registers are set in the third (high-impedance) state, the output signal from element 3 to the digital inputs d / a Converter 7 is connected to the outputs of the second 5 of the register, i.e. the code of the sine of Ncosαiconvert angle, and the switch 8 is at the bottom (indicated on figure 1) position connecting the output of the digital to analogue Converter 7 to 10 second storage capacitor and to the input of the second buffer 12 of the repeater. D / a Converter 7 performs a multiplication operation of the reference voltage Uod.attached to his Ana is ogbomo input, the code on the cosine of Ncosαiconvert angle from the digital inputs from the output of the second 5 case. The result is multiplied by the output of the digital to analogue Converter 7 is formed a voltage proportional to the cosine transform of angle

which is memorized in the second 10 storage capacitor.

Voltage from the first 9 and second 10 storage capacitors through the first 11 and second 12 buffer repeaters respectively connected to the inputs of the first 13 and second 14 modulators, which output signal from the threshold device 15, arriving at their control inputs, generate on their outputs voltage in the form of a square wave that is proportional to the sine Usinαiand cosine Ucosαiconvert angle.

Frequency read (connection) Fconsidered one of th.in the form of a sine-cosine codes Nsinαiand Ncosαiwith outputs of the first 4 and second 5 registers respectively to the digital inputs d / a Converter 7 is performed synchronously with switching of the switch 8, connects the output of the d / a Converter 7 to the first 9 and second 10 storage capacitors, respectively, is determined by the expression:

where N is the number of reads (connections)for the time between successive recording signals Ci and Ci+1;

tp- duration of pause between successive recording signals Ci and Ci+1.

Thus, the use of paths sine and cosine transformations of functional code Converter angle in the sine-cosine voltage of the same digital to analogue Converter with additional introduction of driver packs of pulses allows the constant recharging of the sine and cosine of storage capacitors in the pause between successive signals recording and, thus, significantly improve the accuracy characteristics of the transducer.

1. Functional code Converter angle in the sine-cosine voltage containing the first and second registers, inputs the records are merged and are simultaneously synchronator Converter, the output element is NOT connected to the input of the "disable output of the second register, the output of a source of reference voltage connected to the analog input to analog Converter whose output is connected to the input switch, the first output switch connected to the input of the first buffer repeater to one of the plates of the first capacitor, the second input buffer repeater is connected to one of the plates of the second capacitor, the other plates of the first and second capacitors are combined and connected xine zero potential, the outputs of the first and second buffered repeaters 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, the functional unit conversion code corner code of sine and cosine, characterized in that it introduced the shaper pulse packet, the input of which is connected to synchronou Converter, and the output is connected to the input element, to the input of the "disable output" of the first register and to the control input of the switch the outputs of the first and second registers are combined and connected to the digital inputs to analog Converter, and the information inputs of the first and second registers connected respectively to first and second outputs of the functional block conversion code corner code of sine and cosine inputs which are input code angle Converter, the second output switch connected to the input of the second buffer repeater.

2. Functional code Converter angle in the sine-cosine voltage according to claim 1, characterized in that the shaper pulse packet contains counters is to and the pulse generator, the output of which is connected to the clock input of the counter, the input set initial state which is the input of the shaper pulse packet, and the output is the output of the shaper pulse packet.



 

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