SU1642452A1 - Dc voltage regulator - Google Patents

Abstract

The invention relates to electrical engineering and can be used in secondary sources of electrical power for electronic equipment. The goal is to expand the range of output voltage regulation. The device contains a series regulating MOS transistor 3 and a combined voltage source and error amplifier on MOS transistors 1, 2, 4-6 and resistors 7 and 8. An output voltage is created on the series-connected transistor 6 in a diode connected with a negative temperature a drift and a resistor 8. A current with a positive temperature drift is created through a resistor by 8 elements 1-7. With a certain choice of parameters of the elements of the device circuit, it is possible to ensure a low (up to 1.2 R) thermally compensated output voltage and a high stabilization factor. 1 il.

Description

The invention relates to electrical engineering and can be used in secondary sources of electrical power for electronic equipment.

The aim of the invention is to expand the range of output voltage control.

The drawing shows a circuit diagram of a constant voltage stabilizer.

The constant voltage regulator contains the first 1, second 2, third 3, fourth 4, fifth 5, sixth 6 MOS transistors, first 7 and second 8 resistors. Moreover, the sources of transistors 1, 2 and 3 are combined with the input bus 9, the gates of transistors 1 and 2 are connected to the drain of transistor 2, and the gate of transistor 5 is connected to the drain of transistor 1, the drain of transistor 3 is connected to the output bus 10, and the source of transistor 4 is through resistor 7 connected to the common bus and the source of the transistor 5, the gate of which is connected to the gate of transistor 4 and the first output of the resistor 8, the drain of transistor 5 is connected to the drain of transistor 2, the drain of transistor 4 to the drain of transistor 1, the source of transistor 6 is connected to the common bus and its shutter and drain - to shutter in the transistor 4, the second terminal of the resistor 8 is connected to the output bus 10. A device may be implemented in integralb-t.

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SS Ј &

nom execution The reference voltage source and the error signal amplifier are functionally combined in a single node. The output voltage (allocated on bus 10, is determined from

vye | –q T V4 / ss) (R8 / R7 Uyjg + 6Uy, M (Re / R7)

where CT is the temperature potential;

Sg. WS / LЈ, Sq. Wa / L4 is the ratio of the effective width to the channel length of transistors 5 and 4; Di (, is the difference of the gate-source voltages of the transistors 5 and 4, which has a positive temperature drift; - the gate and drain voltage

a transistor 6 having a negative temperature drift; Ry, Ro - resistance of resistors

7 and 8.

The output voltage is temperature compensated if the condition

By-yu

where 11.0 is the forbidden voltage

 semiconductor zones .35

The stabilizer works as follows.

When the output voltage changes, a part of this increment is applied to the gate of transistor 5, which inverts it and is transmitted to the gate of transistor 1. Transistors 1 and 4 constitute an amplifier circuit with a common source and a resistive load. The amplified and yet again inverted increment of the output voltage is applied to the gate of the control transistor 3 and changes its conductivity so that the output voltage returns to its original value. A multiple increase in the output voltage is made by switching on additional transistors in diode mode in series with transistor 6 and a corresponding increase in the value of resistor 8.

Thus, in comparison with the prototype, this stabilizer can be achieved by introducing new connections to expand the range of output voltage regulation in the direction of low values, i.e. to 1.2 V, and in the prototype the lower value of the output voltage is 2.4 V.

Claims (1)

Invention Formula A DC voltage stabilizer containing six MOS transistors, two resistors, the sources of the first, second and third transistors connected to the input bus, the gates of the first and second transistors connected to the drain of the second transistor, and the drain of the first transistor, the drain of the third the transistor is connected to the output bus, the source of the fourth transistor through the first resistor is connected to the common bus and the source of the fifth transistor, the gate of which is connected to the gate of the fourth transistor and the first The output of the second resistor, characterized in that, in order to expand the output voltage control range, the drain of the fifth transistor is connected to the drain of the second transistor, the drain of the fourth transistor to the drain of the first transistor, the source of the sixth transistor to the common bus, and its gate and drain - to the gate of the fourth transistor, the second output of the second resistor is connected to the output bus.