SU497727A1 - Device for converting constant voltage into code - Google Patents

Description

social scan, which is changed according to the law:

 , t

  ,

where E is the initial voltage across the capacitor of the exponential sweep generator, t is the discharge time, t is the time constant of the discharge circuit.

With 1, the time interval proportional to the input voltage is:

.

When the time interval is filled with stable frequency pulses, the number of pulses is equal to VL T1V6, where is the coefficient depending on the frequency of the filling pulses.

By multiplying this number of pulses by

coefficient k- (i.e. when choosing

one

the desired fill rate), a numerical emulsion code is obtained, proportional to the logarithm of the input voltage.

To obtain the number of pulses, proportional to the logarithm of the voltage, the sum of the numbers of pulses corresponding to the factors:

yV NI + / VM 1 ::.: t / fe (in (7 + In Ui, i)

u (Ui-Ui-, i).

The amount obtained is converted according to the law M e, which is equivalent to potentiation.

The device works as follows.

In the initial state, all the triggers of the device are in the zero-zero position.

When the button is pressed, the trigger starts the exponential sweeper 2 and the voltage from it goes to the comparison circuits 1 and 7, and the control trigger 6 is set to the single position and the valve 5 opens through a single output, through which the pulses from the generator 4 are fed to the adder 15.

When the equalization of the sweep voltage and the smaller of the input voltages is reached (Ui or one of the comparison circuits 1 or 7 is triggered and sets the corresponding trigger L or 9 to one state. The potential from the single output of this trigger goes to the AND OR circuit. Output signal from the circuit 11 gives the expansion to the circuit 12 And, on one of the inputs of which there is already a resolution from the zero output of the trigger 13.

Upon receipt of the next counting pulse from the valve 5 to the circuit 12 And the last generates a signal which, through the delay line 14, goes to the input of the adder 15 and shifts its contents by one bit, which is equivalent to multiplying by 2. The pulse from the delay line 14 is also fed to the input lock trigger 13 and sets it to one. A signal from a single trigger output 13 gives a resolution to the input.

circuits 10 And, and the signal from the zero output - a ban on the scheme 12 I.

When the equalization of the sweep voltage to the larger of the input voltages is achieved, the corresponding circuit 1 or 7 of the comparison is triggered, setting the corresponding trigger 8 or 9 to one state. The coincidence signal of the unit states of the triggers 8 and 9 from the output of the circuit 10 And goes to

the zero input of the trigger 3 controls and translates it to the zero state. In this case, the potential from the single output of the trigger 3 enters the input of the valve 5 and locks it. This stops the supply of counting pulses of the clock generator 4 to the adder 15 number-pulse codes. The code obtained in the adder in the form of a sequence of impulses is fed to the digital analog of the 6th C-circuit, the output code of which will be proportional to the product of the i / i and and.

In case of equality of the input voltages Ui U2, the triggers 8 and 9 will operate simultaneously and will issue signals to the circuit 10 And and

scheme 11 OR. The signal from the output of circuit 11 OR the presence of a counting pulse through the circuit 12 and the delay line 14 is fed to the adder 15 and shifts the contents of the adder by one bit. The same signal from the line 14 of the delayer is fed to the input of the trigger 13, setting it to one condition. The signal from the single output of the trigger 13 through the circuit 10 And returns the trigger 3 to the zero state. The potential from the single output of the trigger 3 is fed to the valve 5 and locks it. In this case, the supply of counting pulses from the generator 4 to the adder 15 is stopped, and a code proportional to

the product of directions (7i and U.

Subject invention

A device for converting a constant voltage into a code containing an exponential scanner, with its outputs connecting to the first inputs of two comparison circuits, the second inputs of which are connected to the input terminals of the device, and the outputs to the inputs of the corresponding comparison memory triggers, their outputs connected with the first and second inputs of the circuits And and P1LI, a clock generator connected to the first input of the adder number-pulse codes, its output connected to the digital analog of the C-circuit, through a valve or, the control input of which is connected to the control trigger, the zero input of the latter is connected to the I circuit, and the single input is connected to the start bus, which differs

so that, in order to combine the operations of multiplication to input voltages, a blocking trigger, a delay line and an additional AND circuit are introduced into it, the output of the OR circuit is connected to the first input of the additional circuit AND, whose output

through the delay line connected to the second input of the adder number of pulse codes and the single input of the trigger lock, the unit output of which is connected to the third

input circuit And, and zero - with the second input of the additional circuit And, the third input of which is connected to the output of the valve and the input of the adder number of pulse codes.