SU1432485A1 - Two-pole current stabilizer - Google Patents

Abstract

The invention relates to an electrical tube and can be used to power electronic equipment. The purpose of the invention is to expand the range of stabilized current. This is achieved by reducing the shunt effect of the resistor 5 on the feedback transistor 4. For this, a fourth transistor 4 with an n-type channel is introduced, the drain of which is connected to the connection point of the gate of the first transistor a 1 with the source of the second transistor 2. The source is connected to the second terminal of the second resistor 6, and the gate to the second pole and to the drain of the third transistor 3. In addition, the introduced transistor, being a generator of ka, additionally stabilizes the current in the common circuit. 1 il. about that- g (L 4 with 1 hd 00 SP

Description

1-1, the invention relates to electrical engineering and can be used in secondary power supplies of radio electronic equipment.

The purpose of the invention is to expand the range of the current to be stabilized.

The drawing shows the principles. electrical circuit of bipolar-hugo station, ab5 "dns ||" vra.,,

Bipolar current stabilizer with fvaoisiJTi fractional transistors 1-3 with control line: n. n not |) by the U-THnaj channel and the polevry transistor 4 with the n-THnaj channel. the first, 5 and the second 6 resistors, the first 7 and the second 8 poles of the stabilizer. The drain of transistor 1 is co-coupled with pole 1 ,, source - with stand-; c1; n transistor 2 and with a junction gate jMc j opa 4, and gate with a source of transistor 2 directly and through a switch ;; source 5 with source transistor 4, art. Which is connected to the gates of the transistor 2 and the transistor 3, the source of the guided through the resistor 6 is connected to the second pole 8, and the drain to the source of the transistor 2.

The stabilizer works as follows.

When changing (decreasing) eg. not on a two-pole due to a decrease in the supply voltage or an increase in load resistance, the current of the two-pole 5 decreases, and the voltage of the transistor 2 and the resistors 5 and 6 decreases; which leads to a decrease in the voltage of the gate, on the gate of the transistors 2.4 and 3, and to a decrease: nn: 1o the equivalent resistance in the source circuit of transistor 1. This causes an increase in the current of the transistors 4: n 3 voltage drops on resistors 5 and 6 f which reduce

0

five

d

about Q

five

voltages across the gates of transistors 4 and 3. As a result, the current of transistor 1, and hence of the two-port network, generally increases at the initially set level with a given accuracy,

Compared to the known stabilizer, the stabilized current range can be significantly expanded and its output dynamic resistance can be increased by reducing the influence of the resistor 6 on the operation of the feedback transistor 4.

Claims (1)

Invention Formula A bipolar current regulator containing three field-effect transistors with a control of the p f – p junction and two current resistors, the first transistor with an n-type channel connected by a drain to the first pole, the source to the drain of a second transistor with an n-type channel, the gate which is connected to the second pole, and the source through the first current-supply resistor to the source of the third transistor with a p-type channel, the gate of which is connected to the connection point of the source of the first and drain of the second transistor, and one of the terminals of the second current-supply resistor connected to the second pole, characterized in that, in order to expand the range of the current to be stabilized, a fourth transistor with an n-type channel is inserted in it, the drain of which is connected to the connection point of the gate of the first transistor with the source of the second, the source is connected to the second terminal of the second resistor, and the gate - to the second pole and to the drain of the third transistor.