SU634452A1 - Driven blocking-generator - Google Patents

Description

(54) WAITING BLOCKING GENERATOR

I

The invention relates to radio engineering and can be used in automation and computer devices.

Known blocking generator containing a transistor, imp. A core transformer with a hysteresis rectangular loop 1. It has low reliability.

The closest technical solution to the invention includes a standby blocking generator containing a transistor and a transformer on a core with a rectangular hysteresis loop, the primary winding of which is connected between the collector and the power supply bus, the secondary through a resistor between the base and the common power supply bus, a third winding - between power source bus 2.

The purpose of the invention is to improve the reliability of the blocking generator.

For this, a standby blocking generator containing a transistor and a transformer on a core with a rectangular hysteresis loop, the primary winding of which is connected between the collector and the power source, the secondary through a resistor between the base and the common mud power supply, and a third winding between the source buses

power supply, a linear core is inserted into the transformer, the primary and output windings of the transformer are located on both cores, and the third and third windings on the core with a rectangular hysteresis loop.

The drawing shows the electrical circuit of the generator.

The waiting blocking generator contains a transistor 1 and a core-2 transformer with a rectangular hysteresis circuit, the primary winding 3 of which is connected between the collector of the transistor and the power supply bus 4, the secondary winding 5 through a resistor B between the base of transistor 1 and the common power supply bus -1. the third winding 7 is between (power supply 4 lines through a resistor 8. The primary winding 3 is shunted by a diode 9. The input terminal 10 is connected to the base of transistor I through series-connected A resistor And and a capacitor 12.

A linear core 13 is inserted into the transformer. The primary winding 3 and the output winding 14 are located on both cores, and the secondary winding 5 and the third winding 7 are located on the core 2 with a direct hysteresis loop.

The blocking generator operates as follows.

When the input pulse is applied to the n-bus line 10, the transistor opens and the core 13 begins to magnetize. In order to provide a positive feedback circuit, it is necessary that the core 2 begin to magnetize, and an increase in the flux linkage AV is necessary. It is necessary from an external input source to open the transistor 1 at the time

4.- K dt

10 t:

where E is the voltage of the power source 4, K is the coefficient of proportionality.

If the duration of the input pulse is less than to, then the positive feedback circuit will not close and at the end of the input pulse, cores 2 and 13 will return to the initial state.

If the duration of the input pulse is greater than to, the TC will begin to re-magnetize the core 2 and the positive feedback circuit will close. The transistor I is in the saturation state. The core 2 is saturated, the positive feedback circuit is cut off, but current I will still flow through transistor I until transistor I goes out of saturation and closes. In that

the gap B) is capacitance-induced and core 13, limiting the magnitude of the picon-collector current of the transistor I,

When the transistor 1 is saturated, all the voltage E is applied to the winding. 3, therefore the utilization rate of the supply voltage is close to unity,

Claims (2)

1. USSR author's certificate No. 387504, M Cl. H 03 K 3/30, 27.01.P. 2. USSR author's certificate No. 428532, M.C. H 03 K 3/30, 18.05.71.