SU1014102A1 - Two-channel surge current generator - Google Patents

Description

 The invention relates to a conversion technique, in particular to a pulse shaper, and can be used in devices for auto- mation, telemechanics, measurement and computer technology, and for controlling thyristors of converters. Pulse drivers are known that contain an amplifier, a summing amplifier-inverter associated with it, the output of which is connected via a diode to the first input of the amplifier-integrator, and the output of the amplifier-integrator is connected to the input of the amplifier tU: The impossibility of these pulses of equal ampersecond areas. The closest to the invention in technical essence and the achieved result is a pulse shaper containing a current integrator based on the first operational amplifier with a feedback capacitor and a resistor, controlled by a two-pole voltage source on the basis of the second operational amplifier with resistors, four diodes , common bus and terminals for connecting loads t 2j. A disadvantage of the known pulse former is also the impossibility of obtaining pulses of equal amperesecond areas. The purpose of the invention is to improve the output parameters by obtaining different-polar impulses of a straight-line shape of equal ampersecond areas in two independent loads from one another. The goal is achieved by the fact that in a pulse driver containing a current integrator based on the first operational amplifier with a feedback capacitor and a resistor, a two-polar voltage source is controlled on the basis of the second operational amplifier, four diodes, a common bus and terminals for connection loads, a controlled two-pole voltage source is provided with dbum zener diodes, and the output of a controlled two-pole voltage source is connected via a series-connected anodes zener diodes to the common busbar and simultaneously to the anode of the first and the cathode of the second diode, respectively, the cathode and anode of which are connected to the first terminals for connecting the corresponding loads, the second terminals for connecting which are connected respectively to the anode of the third and cathode of the fourth diode, respectively, the cathode and anode of which are connected to the inverting the input of the first operational amplifier of the current integrator. FIG. 1 is a block diagram of a two-channel current pulse generator; in fig. 2 - diagrams of voltages and currents, which show his work. The two-channel current pulse generator (Fig. 1) contains four diodes 1-, two zener diodes 5 and 6, two load resistances 7 and 8, a current integrator 9 based on the first operational amplifier and a controlled two-pole voltage source 10 based on the second operational amplifier . Dual-channel current pulse generator works as follows. If the controlled two-pole voltage source 10 generates a positive voltage, the voltage at the output of the current integrator 9 changes according to the 1 g UCT-I law. When the voltage at the output of the current integrator 9 reaches the reference value Upn (Fig. 2), the controlled double field A voltage source of 10 will produce a negative voltage. At the same time, the polarity of the reference voltage changes to the opposite. The voltage at the output of the current interator 9 will begin to increase according to the law — the voltage of stabilization of the corresponding Zener diodes 5 and 6. When this voltage reaches the reference value Uon. the controlled two-pole voltage source 10 will again begin to produce a positive voltage and the operation of the circuit will be repeated. The steady state generator operation can be described by equations I. . J j-Hrn. dt and Oflieg, ii .4 p OcrTj.-1. 1. Won.- fca

By pressing equation (1) and (2), we get

-C-b (l-t) -L).

-Ela (-tVta) -U "t - oniV

UcTf

where V n, - fr

.and.

  O flowing in the resistance of the load 7 and, respectively. 10 Hence, from equations (W) and ()

  l8.Ta, (5): where T, t2, -t4; Ti. . I The use of the invention provides for the formation of rectangular-shaped bipolar pulses of equal ampere-second area in two independent loads, regardless of the constant integration of the current integrator, the values of the reference and output voltages of the controlled two-pole voltage source, the presence of a bias voltage and changes in the voltage of the power supply of the operational amplifiers, which leads to a high accuracy in the formation of pulses.

Uohi

/ X iz / t ivl. from

I /

I

72

Claims (1)

CHANNEL IMPULSE GENERATOR VOLTAGE comprising a current integrator based on a first operational amplifier with a capacitor reverse ^1-coupling and resistor controlled bipolar voltage source based on the second operational amplifier, four diodes and a common bus for connecting terminals loads on aphid and h and w and in order to improve the output parameters by obtaining square-wave bipolar pulses of equal amperesecond areas in> two two loads independent of one another, in it a controllable bipolar The second voltage source is equipped with two zener diodes, and the output of the controlled bipolar voltage source is connected through zener diodes connected in series to the common busbars and simultaneously to the anode of the first and cathode of the second diodes, respectively, the cathode and anode of which are connected to the first terminals for connecting the corresponding loads, the second terminals for connecting which are connected respectively to the anode of the third and cathode of the fourth diodes, respectively, the cathode and anode of which are connected to the inverting input first operational amplifier 'current integrator. , _and SU „1014102