SU699670A1 - Voltage-to-code converter - Google Patents

Description

The invention relates to a measuring and computing technique, in particular to voltage transducers and a code, and can be used to reproduce functional functions, and also as a device for linearizing the characteristics of sensors. A voltage converter into a code consisting of a converter; a voltage to frequency body and a functional frequency converter into one. Its disadvantage is reduced speed with a given accuracy. A voltage-to-code converter is also known, which contains a voltage-to-frequency converter, performed on an integrator, a threshold element and a feedback pulse shaper, the logic element of which one of the inputs is connected to the output of a voltage-to-frequency converter, the input of which is connected to the output of the matching gate. 2. The purpose of the invention is to extend the functionality of the voltage-code converter. This is achieved in that a known voltage-code converter containing a voltage-to-frequency converter performed on an integrator, a threshold element and a feedback pulse shaper, a logical matching element, one of the inputs of which is connected to the output of a voltage-to-frequency converter, and a pulse counter, the input of which is connected to the output of the coincidence logic element, a control unit is inputted, the input of which is connected to the output of the counter, the pulse shaper is controlled and its control The input input is connected to the first output of the control unit, and the pulse counter is reversible, with an additional counting reversal input that is connected to the second output of the control unit. In the drawing, a functional electrical circuit of the converter is given. The device contains a voltage-to-frequency converter 1, consisting of integrator 2, one of the inputs of which serves as the input of the device, threshold device 3, whose input is connected to the output of integrator 2, and output-to the input of controlled feedback generator 4. The output of the latter serves as an output of the voltage-to-frequency converter 1 and is connected to the second input of the integrator 2 and to one of the inputs of the matching logic element 5, the output of which is connected to the input of the reversing counter 6 pulses. The output of the striker 6 is connected to the input of the control unit 7, the first output of which is connected to the control input of the feedback feedback driver 4, and the second output to the control switch. input reversible pulse counter b.

The operation of the device occurs in the following way.

In the initial state, the MO number is recorded in the reversible pulse counter b, the control unit .7, affecting the control input of the controlled feedback pulse driver 4 sets the volt-second feedback pulse area equal to S. At the same time, the output pulse CQB. Frequency (converter 1 voltage to frequency equals

R - Oh

Where and is the voltage to be converted.

To start the converter, a control pulse of duration tg is fed to the second input of logic element 5. Logic. Element 5 starts to pass pulses from the output of the voltage converter 1 to the frequency to the input of the reversible counter of 6 pulses, which begins the algebraic summation of the incoming impulses with the number MQ. The counting direction of the reversible pulse counter b is determined by the signal at its control input specified by the control unit 7, and depends on the required sign of the increment in this area of approximation.

When a reversible counter accumulates 6 pulses of a predetermined number of pulses M, the control unit 7, acting on the control input of the feedback pulse shaper 4, sets the volt-second feedback pulse area equal to S j. And, depending on the required increment sign , sets the counting direction of the reversing counter 6. The frequency of the output pulses of the voltage converter to frequency 1 becomes

 .... S,

Each time the counter code reaches a predetermined number Mz, control unit 7 sends a control signal to shaper 4 control, and counting signal to counter b. As a result, the relationship between the number recorded in counter b and the output voltage is expressed as a piecewise linear function with breaks. at points of Mu, and the sign of the slope of this dependence (increase or decrease) is determined by the direction of counting in this area.

Thus, by virtue of the distinctive features of the invention, a piecewise linear approximation of a function of an arbitrary type can be realized, thereby increasing the functionality of the converter.

Claims (2)

Claims A voltage-code converter comprising a voltage-to-frequency converter performed on an integrator, a threshold element and a feedback pulse shaper, a matching logic element, one of whose inputs is connected to the output of a voltage-voltage converter, and a pulse counter whose input which is connected to the output of the logical element of the match, that is, and then with the fact that, in order to extend the functionality, a control unit is entered into it, the input of which is connected to the output account The pulse shaper is controlled, its control input is connected to the first output of the control unit, and the impulse counter is reversible with an additional account reversal input that is connected to the second output. control unit. Information sources, taken into account in the examination 1, USSR Author's Certificate 493916, cl. H 03. K 13/20, 05/29/73. 2. Gitis E. And. Information Transformers for Electronic Digital Computing Devices. M ,, Energie, 1975, pp. 380-385, fig. 8-7.