SU1396256A1 - Controlled square pulse shaper - Google Patents

Abstract

The invention relates to a pulse technique and can be used in instrumentation circuitry for generating stimulating effects. The aim of the invention is to increase the reliability of operation of the controlled square pulse shaper. For this, the first 8 and second 9 optocouplers are additionally introduced into the shaper. In addition, the device contains a master oscillator 1, a block 2 of the code set, a resistor 3, power sources 4 and 5, output buses 6 and 7, an input bus 10. The block 2 of the dial is completed on keys 11 and 12. When simultaneously closing the keys 11 and 12 on output tires 6 and 7, bipolar pulses are generated. In the initial state of the device, the keys 11 and 12 of the block 2 of the code set are open. This leads to the absence of excitation of the opto-switches 8 and 9 and, accordingly, to the absence of a signal on the output buses 6 and 7, I hp f-ly, 1 ill. i (1 С

Description

The invention relates to a pulse technique and may find application in the circuits of instrumentation for the formation of stimulating effects.

The purpose of the invention is to increase the reliability.

The drawing shows an electrical circuit diagram of the device.

The controlled square-wave driver includes a master oscillator 1, a code dialing block 2, a resistor 3, a first 4 and a second 5 power sources, the first 6 and second 7 output buses. The first output bus 6 is connected to the negative bus of the first power supply 4 and the positive bus of the second power supply 5. The shaper contains also the first 8 and second 9 optocouplers. The output of the master oscillator 1 through a resistor 3 is connected to the anode of the LED of the first optocoupler 8 and the cathode of the LED of the second optocoupler 9. The cathode of the LED of the first optocoupler 8 and the anode of the LED of the second optocoupler 9 are connected to the corresponding outputs of the code set 2, the first and second inputs of which are interconnected and connected to the input bus 10. The positive bus of the first power supply 4 is connected through the photodetector of the second optocoupler 9 to the second output bus 7, which is connected through the photodetector of the first optocoupler to the negative bus w cerned power source 5. Block 2 dialing code is executed on the first and second keys 1! and 12, the first and second inputs of which are the corresponding inputs of the code set 2, the first and second outputs of which are the outputs of the corresponding keys 11 and 12.

The device operates as follows.

In the initial state in the device, the keys 11 and 12 of the code set 2 are open. As a result of this, there is no possibility of a current flowing through the LEDs of the optocouplers 8 and 9, which leads to the absence of photodetector excitation of these optocouplers and, consequently, to the absence of a signal on the output buses 6 and 7-,

In the first mode, zero potential is applied to the input bus 10. When only the first key 11 of block 2 of the code set is closed and if it has a pulse of positive polarity, there is no current flowing through the LED of the optocoupler 9, which remains unexcited due to its reverse bias.

In the presence of a pulse of negative polarity at the output of the generator 1, the LED of the optocoupler 9 is in an excited state due to forward bias. Therefore, the photodetector of the optocoupler 9 is excited and a pulse of positive polarity is formed on the output buses 6 and 7.

When only the key 12 of block 2 of the code set is closed, similar processes occur, but if there is a pulse of positive polarity at the output of generator 1, a pulse of negative polarity is formed on the output buses 6 and 7.

With the simultaneous closure of the keys 11 and 12 of the block 2 of the code set, the described processes alternately occur, forming bipolar pulses on the output buses 6 and 7.

In the second mode, when the voltage arriving at the input bus 10 of the device is greater than the voltage at the output of the generator 1, and the closed key 11 of the unit 2 is passed through the LED of the optocoupler 9, a current is excited by the photodetector of the optocoupler 9. A positive polarity pulse is generated on the output buses 6 and 7.

When the key 12 of the block 2 of the code set is closed, similar processes occur, but if there is a pulse at the output of the generator 1, a pulse of negative polarity is formed on the output buses 6 and 7.

With the simultaneous closure of the keys 11 and 12 of the code set 2, the described processes take place in turn, generating bipolar pulses on the output buses 6 and 7.

Claims (2)

Claim 1. A controlled square-wave pulse generator comprising a master oscillator, a code dialing block, a resistor, first and second power supplies, first and second output buses, a first output bus connected to a negative bus of the first power source and a positive bus of the second power source, characterized in that , in order to improve the reliability of operation, the first and second optocouplers are introduced into it, the output of the master oscillator through a resistor is connected to the anode of the LED of the first optocoupler and the cathode of the LED of the second optocoupler, the cathode is light the diode of the first optocoupler and the anode of the LED of the second optocoupler are connected to the corresponding outputs of the code block, the first and second inputs of which are interconnected and connected to the input bus, the positive bus of the first power source is connected through the photodetector of the second optocoupler to the second output bus, which is through the photodetector of the first optocoupler connected to the negative bus of the second power source. 2. The shaper according to claim 1, characterized in that the code block is executed on the first and second 10 keys, the first and second inputs of which are the corresponding inputs of the code set block, the first and second outputs of which are the outputs of the corresponding keys.