SU134489A1 - Voltage converter to code - Google Patents

Description

Devices for converting 5 continuous values into discrete ones are known, based on the principle of comparison of the voltage to be converted with the sawtooth voltage and containing the sawtooth voltage and stabilized frequency pulse generators, two circuits of comparison and a counter.

The proposed voltage-to-code converter allows bipolar voltage to be converted without significant equipment increase and decrease in accuracy. Two triggers are used in it, one of which (control trigger) is connected to the outputs of the comparison circuits and serves to open the valve connected between the stabilized pulse generator frequency and counter, and the second trigger, also connected to the outputs of the comparison circuits, serves to determine the sign of the voltage to be converted. Generator 1 (see block diagram) clock pulses produces a "start of conversion" pulse, which starts the generator 2 sawtooth voltage. A circuit is connected to the output of generator 2; Comparisons 3 and 4- The transformable voltage and the potential of the earth are respectively supplied to the inputs a and b of the comparison circuits, respectively. Each of the comparison circuits is triggered at the moment of equality of the saw-tooth voltage and voltage applied to the second input (a or b). The short-duration pulses thus obtained are supplied to the control trigger, which controls the valve 6. The trigger 5 outputs the enabling potential (in time proportional to the voltage to be converted) to the valve 6, opens it, and the frequency stabilizer generator 7 passes to the counter 8.

So, in the meter the number is fixed --- MODULE is convertible -, voltage.

The time shift between the pulses from the comparison circuit of the percootsio pien to the voltage being transformed and does not depend on its sign Yes the positive transformable voltage comes from the comparison circuit 5, for a negative comparison circuit 4

To obtain the desired time interval, the trigger trigger must be controlled at the counting input, for which it is necessary to set the trigger to its initial state at the beginning of the converter operation. To this end, an impulse of the device is applied to one of the separate control trigger inputs "The beginning of the conversion; the sign of the voltage to be converted is determined by the order of arrival of the pulses from the comparison circuits on the separate inputs of the trigger 9 of the feature.

Subject invention

Voltage converter in the code containing the sawtooth voltage and pulse generators with a stabilized frequency two: comparison and counter mats, with the help of which and with the aim of ensuring the conversion of bipolar voltage while maintaining accuracy two triggers, one of which (the trigger is controlled) is connected to the outputs of the comparison circuits and serves for the end. A valve connected between the impulse generator GV, stabilizer, kp, frequency and counter, another trigger connected to the HHVO сравн mm comparison circuit, serves to determine the sign