SU480161A1 - Pulse shaper frequency multiplier - Google Patents

Description

one

A pulse shaper-frequency multiplier is known that contains a six-phase, single-wavelength rectifier made to the emitter — basic transitions of transistors, whose emitters are connected to a single DC power supply busbar, and differentiating units.

The proposed device differs from the known fact that the collectors of the transistors, the emitter — the basic transitions of which are connected to one three-phase symmetric voltage star of the rectifier and the collectors of the transistors — the emitter — the basic transitions of which are connected to another symmetric three-phase voltage star shifted relative to the first by 60 el . hail. are combined into two groups, each of which is connected via a differentiating unit with a different power bus, with the output terminals of the differentiating units connected in parallel. In addition, the proposed device differs from the known one in that the differentiating unit is made in the form of a transistor locking oscillator with automatic bias, with a starting circuit consisting of a parallel-connected capacitor and a resistor connected between the base and the DC power supply bus.

These differences simplify the device.

FIG. 1 shows a circuit diagram of a pulsed frequency multiplier; in fig. 2 is a circuit diagram of a pulse frequency multiplier for the case when both blocking oscillators are made on the same transformer; in fig. 3 - timing diagrams for devices operation.

Pulse driver - frequency multiplier consists of half-wave six-phase rectifier 1 and two identical differentiating blocks 2 and 3, made in the form of transistor locking generators with automatic bias. Rectifier 1 is made to the emitter - the basic transitions of transistors 4-9. A constant voltage supply bus 10 is connected to the common emitter of the rectifier. The collectors of the transistors 4, 6, 8 are connected to the anode of the diode I, which serves to isolate the bias voltage of the transistor 12 of the blocking generator 2. The collectors of the transistors 5, 7, 9 are connected in a similar way to the identical blocking generator 3.

The resistor 13 is connected to the anode of the diode 11, and the other to the base of the transistor 12 and serves to supply a block voltage to the transistor 12. The resistor 14 is connected to the emitter of the transistor 12 and the DC bus 15 and serves to flow current through the diode 11, causing a bias voltage drop across diode 11.

The blocking generator is made on a transformer 16. Between the base of the transistor 12 and the bus 15 there are connected in parallel connected resistors 17 and a capacitor 18, which serve to start the blocking generator.

The proposed shaper works as follows.

Only one transistor in a rectifier is open at a time. Let the transistor 4 open at time point to (see Fig. 3), then the charge current pulse of the capacitor 18 passing from the power supply 10 through the transistor 4, the diode I, the emitter to the base transition of the transistor 12 to the pin 15, blocking generator runs. A blocking process occurs, followed by the appearance of a voltage pulse at the output terminals 19, 20. At the end of the blocking process, the transistor 12 is locked by a voltage drop across the diode 11. At the time ti, the transistor 5 opens and the process repeats in the blocking generator 3 and t When summing the output voltages of the blocking oscillators 2 and 3, we obtain in voltages 19, 20 a sequence of voltage pulses of the infested frequency relative to the voltage of the supply rectifier.

Subject invention

Claims (2)

1. Pulse shaper-frequency multiplier containing a half-wave single-half-rectifier made on the emitter — base transitions of transistors, the emitters of which are connected to one DC power supply, and differentiating units differing in that, in order to simplify, the collectors of the transistors, the emitter - the basic transitions of which are connected to one three-phase symmetric star of the rectifier voltage, and the collectors of transistors, the emitter - the basic transitions of which are connected to another symmetric three-phase star of the voltage shifted relative to the first 60 degrees, combined into two groups, each of which is connected through a differentiating unit to a different power supply, with the output terminals of the differentiating units connected in parallel. 2. Pulsed shaper-frequency multiplier according to claim 1, characterized in that the differentiating unit is designed as a transistor blocking generator with an automatic bias, with a triggering chain between the base and the power supply voltage of the direct voltage, consisting due to a parallel connected capacitor and resistor. LDiJ jLD with tod K a c b a j ft, L Irn, J iU-jylK 1. JJ (tit Fig.Z