SU894725A1 - Voltage dividing device - Google Patents

Description

() DEVICE FOR DIVIDING VOLTAGES

I

The invention relates to analog computing and can be used to perform a division operation in simulation installations and analog computing machines.

A device for dividing voltages containing zero-organs, three flip-flops, three integrating circuits and a clock pulse generator is known; we will take one inputs of the first and second flip-flops connected to the output of the clock generator, and the outputs through the first and second integrating circuits to one inputs zero. -organs, the other inputs of which are connected to the inputs of the device, and the outputs - to other inputs of the first and second flip-flops and the inputs of the third flip-flop, the output of which is connected to the input of the third integrating circuit 1 3 The disadvantage of this device Twa is to limit the range of variation of the input analog signals.

ONE of which must necessarily be larger than the other in order for a certain sequence of null-organs to operate.

Closest to the proposed technical entity is a device for dividing voltages, containing a control unit, the output of which is connected via two RC circuits to the first inputs of zero-organs, the second

The 10 inputs are connected to the inputs of the device, and a third RC circuit connected in series, a key and a memory block whose output is the output of the device.

15

A disadvantage of the known device is that in this device the range of variation of the input voltages is limited by the condition. If this condition is not met

20 becomes inoperative.

The purpose of the invention is to expand the range of input voltage variation. The purpose of the invention is to provide a voltage separation device containing three integrating RC circuits, two zero-organs, a first key, a memory unit and a control unit, the first output of which is connected to the inputs of the first and the second integrating RC circuits whose outputs are connected respectively to the first inputs of the first and second null organs, the second inputs of which are respectively the first and second inputs of the device, the output of the third integrating RC circuit is connected to the formation key input, the output of which is connected to the memory block input, the memory block output is the device output, the OR element, two triggers and two AND elements are entered, the zero-org.an outputs are connected to the first and second inputs, of the OR element, the output of which is connected to the first inputs of the elements And, the second output of the control unit is connected to the first input of the first trigger, the second input of which is connected to the output of the first element And, the first input of the second trigger and the input of the third integrating RC circuit, the output of the first trigger ra is connected to the second input of the first AND gate output of the second flip-flop is connected to the second input of the second AND gate, whose output is connected to the second input of the second flip-flop and the control input key.

The drawing shows a block diagram of a device for voltage division.

The device contains a control unit 1, the output of which is connected to one of the inputs of trigger 2 and the inputs of integrating RC circuits 3 and whose outputs are connected respectively to the first inputs of the zero-organs 5 and 6, the second inputs of which are connected to the inputs of the device, and the outputs through the element OR 7 - with the first input of the first element AND 8, the second input of which is connected to the output of trigger 2, and the output to the other input of trigger 2 of the input of the integrating RC circuit 9 and one of the inputs of the trigger 10, the output of which is connected to the first input

the second element And P, the second input of which is connected to the output element

OR, and the output to the other input of the trigger 10 and to the control input of the key 12 connecting the output of the RC circuit

with the input of the memory unit 13, the output of which is the output of the device.

The proposed device for dividing voltage works as follows.

At the beginning of the cycle set by control unit 1 by applying a start pulse to the corresponding inputs of RC circuits 3 and A and one of the inputs of trigger 2, the capacitors of these RC circuits are charged to a certain voltage, the value Uj of which exceeds the maximum possible value of the input voltages X and W.

At the beginning of the cycle, the discharge of the capacitors of the RC circuits 3 and 4 begins exponentially. Let's say. Then at the moment of time corresponding to the equality of voltage X and voltage from the output of RC circuit 3, the zero-body 5 is triggered, the pulse from the output of which passes through the element OR 7 and the element AND 8 (a high input is given to its second input, i.e. the resolving potential, from the output of trigger 2, set, as was said above, to position 1 at the beginning of the cycle, starts the control unit 1 with a pulse), and, first, starts the RC circuit 9, secondly, flips trigger 2 to its initial position O (high, resolving potektsial from the second input of the element And 8 is removed), and the trigger 1 0 - to position 1 (permitting potential from a single input, trigger 10 is fed to the second input of an And 11 element, preparing it for passing the next pulse from the output of an OR 7 element). At the moment of time., Corresponding to the equality of the voltage Y and the voltage from the output of the RC circuit 4, the zero-body 6 is triggered, the pulse from the output of which passes through the element OR 7 and the element 11 and, first, sets the trigger 10 to The position O, secondly, a short-time closure of the switch 12, permits the reading of the current voltage value from the output of the RC circuit 9 to the memory block 13. After that, the device circuit is ready for the next measurement cycle.

The current voltage value recorded in memory block 13 is proportional to the quotient of the division of the input

-, Y voltage Z y

If, then first the null-organ 6 will work, and then the null-organ

five; otherwise, the sequence of operations described above does not change. Then the voltage memorized in memory block 13 is recorded

7X

  7

Therefore, the result of dividing the proposed device is always obtained as the ratio of the smallest to the larger of the input voltages, the ratio between which can be: CW; In a known device. The same result is obtained only under the condition (otherwise the device is inoperable), which limits the range of variation of the input voltages.

Claims (1)

1. Copyright-certificate of the USSR If 3t4 56, cl. P 06 G 7/16, 1972. USSR author's certificate N 428398, cl. G 06 G 7 / 1b, 1972 (prototype).