SU1324097A2 - High-voltage switch - Google Patents

Abstract

The invention relates to a pulse technique, is complementary to the author. St. No. 1133662 and can be used for switching high voltage in pulse modulators. The purpose of the invention is to reduce the cut-off duration of the output pulses. The device contains N transistors 1-1 ... 1-N, N first resistors 2-1 ... 2-N, N first diodes 3-1 ... 3-N, N second resistors 4-1 ... 4 -N (N-1) third resistors 5-1 ... 5- (N-1), (N-1) second diodes 6-1 ... 6- (N-1), control signal source 7, Fourth 8 and fifth 9 resistors, Zener diode 10, up-. Additional transistor 11, N sources 12-1 ... 12-N constant voltage. -In the device entered N capacitors 15-1 ... 15-N, N fixing diodes 16-1.,. 16-N. The drawing also shows the load 13, the common bus 14. The introduction of new elements with new interconnections makes it possible to reduce the degree of our transistors, due to which the goal is achieved. 1 il. § (L P-Shch to - - -1- GSL SH

Description

1 1324097 invention relates to pulsed

can be used for switching high voltage in pulse modulators and is an improvement of the known device described in ed. St. № 1133662

The purpose of the invention is to reduce the duration of the cutoff of the output pulses by reducing the degree of transistors.

The drawing shows a diagram of a high-voltage switch.

to

In addition, a high-voltage p-driver contains N capacitors 15-1 ... 15-N and N fixing diodes. 16-1 ... 16-N, each first 5 resistor 2-1, .. 2-N is equipped with a tap that is connected directly to the first output of the corresponding fixing diode 16-1 ... 16-N and through the corresponding capacitor 15 -1 ... 15-N is connected to the base of the corresponding transistor 1-1 ... 1-N, the collector of which is connected to the second output of this fixing diode.

High-voltage switch co-High-voltage switch works N transistors 1-1 ... 1-N, which are 5 as follows, which are connected in a consistent manner and are shunted by the first resistors. In the initial state in the pauses by the resistors 2-1. .2-N, N of the first diodes between control pulses of trans 3-1 ... 3-N, which included the anti-resistors 1-1 ... 1-N and 11 are closed, parallel to the base-emitter junction 20 pr the load 13 is missing, the corresponding transistors and are shunted by the second resistors 4-1 ... 4-N, N-1 of the third resistors 5-1 ... 5- (N-1) and the second d iodine 6-1 ... 6- (N-1)

which are connected in parallel, the source is 25 the same. Capacitors 1571 ... nickname 7 control signals, additional 15-N through resistors 5-1 ... 5- (N-1),

The voltages across the collector-emitter gaps of transistors 1-1 ... 1-N are equal to Е,, where Е, 2 are the source voltages 12-1 ... 12-N, which are presumptive fourth 8 and fifth fifth resistors, Zener diode 10, additional transistor 11 of the opposite

conductivity type and sources 12-1.

12-N DC voltage, which are connected in series, each connection point of the sources 12-1 .., 12-N DC voltage is connected to the first output of the corresponding third resistor 5-1 ... 5- (N -1), the first output connection of the sources 12-1 ... 12-N constant voltage is connected through a load 13 to the collector of the N-ro transistor 1-N, the base of each transistor 1-1 ... 1-N (except the first 1-1) is connected to the second output of the corresponding third resistor 5-1 ... 5- (N-1), the emitter of the first transistor 1-1 is connected to the common bus 14, the collector is additional

of the transistor 11 is connected to the second 1-N, and the load 13 is applied

connecting the sources 12-1 ... voltage N (,), where

12-N constant voltage, with a pen-E - voltage drop on open

the output terminal of the Zener diode 10 and through the "; Q Q Transistors 1-1 ... 1-N. On resistor

the fourth resistor 8 with a total length of 14.8 is formed in proportion to the current

the emitter of the additional transistor loading a negative differential, eg, 11 is connected to the second output of the stabilization, which is fed to the collector of the tranlitron 10, the base of the first transistor raster 11 and the anode of the zener diode 10

1-1 and through the fifth resistor 9 to the first one which remains locked, since the output of the source 7 of the control stabilization is chosen from its signals, and the base is connected to the second one more than the value of the drop of the source of the 7 control sig-pr resistor 8 at rated current load 13.

 The high-voltage switch operates as follows. In the initial state, in the pauses between the control pulses, the transistors 1-1 ... 1-N and 11 are closed, the voltage on the load 13 is absent,

are the same. Capacitors 1571 .. 15-N through resistors 5-1 ... 5- (N-1),

The voltages across the collector-emitter gaps of transistors 1-1 ... 1-N are equal to Е,, where Е, 2 - source voltage 12-1 ... 12-N, which are assumed to be 2-2, .. AN, 2 -1 ... 2-N, diodes 6-1 ... 6- (N-1) and Zener diode 10 (for the lower capacitor 15-1) charge to -i

30 voltage E,

Kb

but

where K: 1 is the division factor of the voltage dividers formed by resistors 2-1. 2-N, equipped with taps. When entering from the first output of the source 7

j of the control signals through the resistor 9 to the base of the transistor 1-1 of a positive impulse. Starting the data transistor is unlocked. DC source of 12-1, flow through

The 4Q circuit resistors 5-1, 4-2, the collector-emitter gap of the open transistor 1-1, resistor 8, creates a positive voltage drop across resistor 4-2 and the base of transistor 1-2, starting from 45 perimeter transistor 1-2. Further, transistors 1-2 are similarly unlocked ...

When a pulse is formed, the voltage on the collector of each transistor decreases from the value E, to the value E, 5 of the voltage on the capacitor 15-1., 15-N due to pushing diodes 16-1 ... 16-N. In addition, each capacitor 15-1., 15-N is partially discharged through a diode 16-1 ... 16-N and an open transistor 1-1 ... 1-N. At the same time, the discharge current is directed towards the current that is supplied to the base of the transistor. As a result, during the formation of the pulse peak, the degree of expression of each of the transistors is automatically reduced. 15

At the moment of time that coincides with the end of the pulse, a negative pulse is sent to the base of transistor 11 from the second output of the source 7 of the control signals. Reset 20 unlocks this transistor. Negative voltage is applied to the base of transistor 1-1, which accelerates the process of resorption of minority carriers charge on the basis of this transistor and provides a reduction in off time. After locking the transistor 1-1 avalanche, but the remaining transistors 1-2 ... 1-N.30 are locked

The reduced degree of saturation in transistors 1-1 ... 1-N at the same time gives an additional decrease in the absorption time, which contributes to the further compiler D.Ivanov Editor M.Tovtin L. Tehred L.Oliynyk

Order 2972/56 Circulation 901 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project 4.

This reduces the duration of the cutoff of the output pulses.

When a short circuit occurs in the load 13, the current through the resistor 8 increases and the voltage drop across it increases, causing the zener diode 10 to open. As a result, the base of the transistor 1-1. a negative voltage drop is applied, causing the avalanche-like locking of transistors 1-1 ... 1-N similar to that described.

The duration of the cut-off output pulses of the proposed high-voltage switch is less than the known ones for. by reducing the saturation of either transistors.

Claims (1)

Invention Formula High-voltage switch by bus. St. No. 1133662, characterized in that, in order to reduce the cut-off duration of the output pulses, N capacitors and N fixing diodes are inserted, each of the N first resistors having a tap that is connected directly to the first output of the corresponding fixing diode k transistor, the collector of which is connected to the second output of this fixing diode. Proofreader G. Reshetnik