SU411630A1 - - Google Patents

Description

one

This invention relates to the field of digital measurement technology.

Signal-to-time amplitude converters are known, comprising an integrator, a comparison circuit, a control unit, a trigger, an input switch, and a key.

In order to enable the conversion of variables and impulse voltages, the proposed converter is provided with an additional key, the output of which is connected to the integrator input through a summing resistor, and the control input to the output of the comparison circuit and to the trigger input of a switch, one of the two inputs Comparison circuits are connected to an input switch.

FIG. 1 shows a block diagram of the proposed device; pas figs. 2 - time diagram.

The proposed converter contains an input switch 1, a comparison circuit 2, a control block 3, an integrator 4, keys 5 and 6, trigger 7, resistors of integrating RC circuits 8 and 9, sources of constant voltage ± 1/0.

The operation of the converter is carried out in two cycles.

In the nerve cycle, the output of the integrator is tested to the equality of its amplitude value measured

the signal, and in the second, the integrator discharge by the voltage of a known amplitude opposite the field of polarity. At the same time, the discharge time of the integrator to zero turns out to be proportional to the amplitude of the measured nanometer and can be measured by any method. On command from block 3, input switch 1 is set to the lower position, and a measured signal is fed to one of the inputs of block 2. The comparison circuit works in such a way that with the input signals, where Uc is the voltage at the integrator output, the switch 6 closes and the voltage - Bo is connected via resistor 8 to the input of the integrator 4. The output pulses of the comparison circuit arriving at the separate trigger input 7, confirm its state corresponding to the closure of key 5. At an arbitrary time to (the comparison circuit operates, and as a result of the negative voltage connection to the input of the unit 4, the capacitor starts to charge. At the time t (Ux.Uc), the comparison circuit is activated, the key h 5 closes and opens

at time 4. Next, the process repeats. When the comparison circuit triggers at the end of the transition of the positive half-wave UK through the maximum value (tn at some time (tn), on command from the control unit, switch 1 is set to

to the upper position, and the trigger 7 opens the key 5. As a result, the reference voltage + / 0 is connected through a resistor 9 to the input of the integrator, which for a / c, discharges to zero. At the moment (), the comparison circuit is triggered again and, via trigger 7, which closes key 5, notifies of completion of / c ,.

p 7

And tu, - and, whence it is clear that

the interval c, is directly proportional to the amplitude of the measured signal, and the accuracy of the conversion is determined only by the stability of the parameters of the RC circuit and the constant voltage of positive polarity.

Subject invent and

The amplitude converter of the signal into a time interval containing an integrator, a comparison circuit, a control unit, a trigger, an input switch and a key, characterized in that, in order to enable the conversion of variables and pulse voltages, it is provided with an additional key, the output of which through: summing resistance the integrator, and the control input, with the output of the comparison circuit and, via a trigger, with the control input of the key, and one of the two inputs of the comparison circuit is connected to the input switch Thelema.

and.

FIG. one

FIG. 2