SU822369A1 - Bipolar switch - Google Patents

Description

The invention relates to electronic engineering, in particular to electronic commutation technology, and can be used to create alternating current switching devices. A two-pole key is known, with two switching and two controlling transistors, two control windings, diodes and resistors, switching transistors connected in parallel and included in a switching circuit, the control transistor and winding are connected in series with the base-emitter junction of each switching transistor. control, and between the collector and the base of each, the switching transistor is turned on diode 1. The disadvantages of this device are the design complexity and control complexity. According to the technical essence and circuit design, the bipolar switch containing the first and second transistors of various types of conductivity, the emulators of which are combined and connected to the common bus, the first and second diodes, the transistor inverter and the resistors, the collector of the first transistor, is closest to the proposed one. through the first diode, and the collector of the second transistor through the second diode is connected to the output bus of the device, which is connected to the input bus 2 through a resistor. The disadvantage of this device is the design complexity. The purpose of the invention is to simplify the design. The goal is achieved by the fact that in a two-pole switch containing the first and second transistors of different types of conductivity, the emitters of which are combined and connected to the common bus, the first and second diodes, the transistor inverter and resistors, the collector of the first transistor through the first diode, and the collector of the second transistor through The second diode is connected to the output bus of the device, which is connected to the input bus through a resistor, the base of the first and second transistors through a limiting resistor, and the transistor inverter are respectively connected device control bus. The drawing shows a schematic diagram of a two-pole key. A two-pole key. contains the first 1 and second 2 transistors, the first 3.

And the second 4. diodes, a resistor 5 connected between the input 6 and the trick 7 of the device buses, an inverter 8 connected between the base of the transistor 2 and the forward direction bus 9, to which the transistor 1 connects to the limit 1 {5 gel resistor.

The device operates as follows.

With a Zero control signal on bus 9, the transistor of the inverter 8 is open, and transistors 1 and 2 are locked. The boiler-switching signal of both polarities passes from input 6 to output 7 of the device. With a positive control signal on the control bus 9, the transistor of the inverter 8 is closed, and the base-emitter transitions of the transistors 1 and 2 are shifted in the forward direction. If the switched signal is positive, then it is shunted to the common bus by the open transistor 1, and if the signal is negative, then the open transistor 2. In any case, the switched signal does not pass to the output 7 of the device.

Formula inventions

A bipolar switch containing the first and second transistors of different conductivity types, whose emitters are. the first and second diodes, the transistor inverter and resistors, the collector of the first transistor through the first diode, the collector of the second transistor through the second diode are connected to

 an output bus of a device which, through a resistor, is connected to an input bus, characterized in that, in order to simplify the design, the base of the first and second transistors

S Through a limiting resistor and a transistor inverter are connected to the control bus of the device.

Sources of information 0 taken into account in the examination

1. USSR author's certificate

I 413627, class G 03 K 17/66, 26.05.72.

2. USSR Author's Certificate for Application No. 2429737,

cl. H 03 K 17 / 60,14.12.76 (prototype).

Claims (1)

Claim A bipolar switch containing the first and second transistors of various types of conductivity, the emitters of which ^are combined and connected to a common ³ bus, the first and second diodes, the transistor inverter and resistors, the collector of the first transistor through the first diode, the collector of the second transistor through the second diode connected to the output bus of the device, which is connected through the resistor to the input bus, characterized in that, in order to simplify the design, the base of the first and second transistors t5 has a limiting resistor and a transistor inverter with Responsibly connected to the device’s control bus.