SU938373A1 - Blocking oscillator of pulse bursts - Google Patents

Description

(B) BLOCKING-GENERATOR OF PULS PUTS

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The invention relates to a pulse technique and can be used, for example, in measuring circuits, pulsed and computing devices as a source of high-stable pulses, in television as a generator of mutually synchronized frame and line scan pulses of an image.

A blocking generator of pulse bursts is known, which contains a common emitter transistor, an impulse transformer connected by the first output of the first winding to the collector of the transistor and the first output (the second 5 windings to the base, a resistor connected by one end to the second output of the second winding, as well as an input clamp, collector power source, time

m specifying a capacitor connected by one plate to the second output of the second winding, and the other to the common busbar, and an additional winding of the transformer, one end of which is connected to the collector of the transistor and the other end through the series-connected resistor and diode to the emitter of the Hi transistor.

The disadvantages of the generator include high energy costs for the formation of pulses associated with the presence of a source of collector power.

The blocking generator of packs 1 of pulses is known, which contains a transistor, whose collector is connected to the power supply bus through the first transformer winding, the transistor base through the successively connected second transformer winding, the first diode and the parallel-connected capacitor and resistor are connected to the same power supply bus, moreover, parallel to the second winding of the transformer a and the first diode, the second diode C2l is turned on. 393 However, in a well-known generator, the energy costs of forming a burst are also high. The goal of the invention is to reduce the energy consumption for generating bursts of pulses. The goal is achieved by the fact that, in a blocking generator, a pulse bank containing a transistor whose collector is connected to the first capacitor plate through the first winding of a transformer, the base of the transistor is connected to the first terminal of the second winding of a transformer, a resistor, a diode. the second capacitor plate is connected to the second output of the second winding of the transformer directly, and via a resistor to the emitter of the transistor and the input signal bus; the first capacitor plate is connected via a diode to the second bus of the input signal source. The drawing shows a schematic diagram of a blocking generator of pulse bursts. The generator contains a transistor 1, a transformer 2 connected by the first output 3 of the first winding A to the collector of transistor 1 and. the first terminal 5 of the second winding 6 to the base of transistor 1, a resistor 7 connected at one end 8 to the second output 9 of the second winding 6 and the other end 10 to the emitter of transistor 1, bus 11, and a diode 12 and a capacitor 13. and the capacitor 13 is connected between the second terminals 9 and I windings and 6 transformer 2, and the diode 12 is connected by one of its conclusions 15 to the second output 1 of the first winding and the other output 16 to the bus 11. The blocking generator operates as follows. A sinusoidal or pulse-shaped input signal through diode 12 charges the capacitor 13. Since transformer 2 provides positive feedback between the collector and the base circuit of transistor 1, when voltage appears on capacitor 13, the blockING process occurs only at those times the charge current of the capacitor 13 is terminated and the transistor leaves the saturation. In this case, the circuit generates pulses, the period of which is determined by the parameters of transformer 2 and transistor 1. 3 Generation is interrupted at times when a capacitor 13 is charged by alternating voltage. The charging pulses of the capacitor 13 form voltage pulses on the resistor 7, the incoming base of transistor 1, as a result of which the latter transforms into saturation, and the small input and output resistances of the unlocked transistor 1 shunts the blocking transformer, stalling generation. Thus, a pulse train is formed on the collector of transistor 1, the repetition period is equal to the repetition period of the input voltage, the voltage of the capacitor 13 is used as a source of collector power, and the charging impulses of the capacitor create voltage pulses on the resistor 7 pulses emitter-baa. transition of the transistor, passing in a saturated state. As a result, the generation of the block generator fails. Since the input signal provides the formation of the supply voltage of the collector and simultaneously the clock pulses, this increases the stability of the mutual synchronization of the frequency of the external and own pulses of the blocking generator. Claims of the invention Blocking pulse generator containing a transistor whose collector is connected to the first capacitor plate through the first transformer winding, the transistor base is connected to the first output of the second transformer winding, so that, in order to reduce the consumption power, the second capacitor plate is connected to the second output of the second winding of the transformer directly, and through a resistor to the emitter of the transistor and the input source bus, the first capacitor plate Ator is connected via a diode to the second bus of the input source., Sources of information taken into account during the examination 1. USSR author's certificate tf "21112, class N 03 K 3/30, 197. 2. USSR author's certificate No. 550760, class . H 03 K 3/30, 1975 (prototype).

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Claims (1)

Claim A blocking generator of pulse packets containing a transistor, the collector of which is connected to the first capacitor plate through the first winding of the transformer, the base of the transistor is connected to the first output of the second transformer winding, a resistor, a diode, characterized in that, in order to reduce power consumption, the second lining a capacitor coupled to the second terminal of the second winding of the transformer directly and via a resistor - to the emitter of the transistor and the bus of the input source, the first plate of the capacitor is connected alternation ¹ diode to the second bus input source. "