SU413601A1 - - Google Patents

Description

one

The invention relates to the field of pulsed technology and telemechanics.

Known pulse generators containing a comparator, the output of which is connected to the counting trigger input on transistors, OR circuits and retarded RC circuits.

The purpose of the invention is to obtain the ability to control the pulse duty ratio, as well as increase the stability of the generator.

For this purpose, in the proposed generator, some pins / C-circuits are connected to the power supply bus, and others to the outputs of two OR circuits, some of which are connected to the trigger outputs, others to the comparator input, the second input of which is connected to a resistive voltage divider.

The drawing shows a functional diagram of the proposed generator, one of the options.

The generator contains two integrated / C-circuits, consisting of resistors 1, 2 and capacitors 3, 4, trigger 5, a comparator 6 with a power supply voltage divider on resistors 7, 8, and two OR 9, 10 circuits.

The device works in the following way.

If the output 11 of the trigger 5 has a high potential, and the output 12 is low, the capacitor 4 In this case, is shunted by the output 12, and

1 capacitor 3 is charged through resistor I. At the time when the voltages on the capacitor 3 and resistor 8 are equal, the comparator 6 overturns the trigger 5. The output of the latter discharges the capacitor 3, and the high potential at the output 12 by locking the diode of the OR 10 circuit clears the capacitor 4. The last starts to charge through resistor 2. At the moment of equal voltage on the capacitor 4 and resistor 8, the comparator 6 trips the trigger 5. The capacitor 4 is discharged, the capacitor 3 is charged, etc.

As part of one generator, the KS circuit can be switched on in different ways.

The absence in the circuits of charge (discharge) of capacitors of the direct displacement transitions of semiconductor elements with high quality diodes in the OR circuit, the identity of the comparison channels and the presence of common sources of reference and switching voltages make the device highly stable and accurate from the point of view of capacitor capacitance conversion time intervals.

Subject invention

A pulse generator containing a comparator, a trigger with a counting input, an OR circuit, and time delayed C-circuits, characterized in that, in order to control the duty cycle of the generated pulses, as well as to increase the stability of the generator, some conclusions | The C-circuits are connected to the power supply bus, and the other terminals are connected to the outputs of two OR circuits, some of which are connected to the trigger outputs, others to the comparator input, the second input of which is connected to a resistive voltage divider.

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