SU1418681A1 - Parametric voltage stabilizer - Google Patents

Abstract

The invention relates to electrical engineering and can be used in secondary power sources. The purpose of the invention is to increase the efficiency and the expansion of the range of variation of the supply voltage. The device contains bi-field voltage 1 and field 2 transistors, a Zener diode 3 and two bias resistors 4, 5. The minimum voltage value of the power supply is reduced by reducing the voltage drop on the current-supply stage of the Zener diode 3. This is ensured by excluding the bias voltage of the FET 2 from the voltage on the current-staging stage of the Zener diode 3. Power is not applied to the resistors 4 and 5 can be made fairly small, practically not affecting the efficiency of the device. 1 il.

Description

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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 increase the efficiency and expansion of the range of variation of the supply voltage. .

The drawing shows the principle electrical circuit parameter LiecKoro voltage regulator. I The voltage regulator contains an ipol transistor 1, a field franzistor 2, a reference zener diode 3, the first 4 and second 5 bias resistors and a load 6. Moreover, the collector of transistor 1 and the drain of transistor 2 are connected to the input terminal, the base of transistor 1 is connected to source Directly, and with a common bus through a Zener diode 3, transistor-2 gate is connected to a source through a Pe-4, and to a common bus — through a resistor 5, the emitter of transistor 1 is connected to an output terminal for connecting Hiarpy3KH 6. Zener diode 3 power current Created with transistor 2 with help voltage divider biasing resistors 4 and 5. A constant voltage

on the resistor 4, applied to the control input of transistor 2, creates a constant current determined by the characteristics of the field-effect transistor.

The stabilizer works as follows.

When the supply voltage changes, the current, pr, swelling through t; ranzistor 2 changes. However, this change is insignificant due to the large dynamic resistance of the transistor 2. Therefore, the voltage changes on the reference Zener diode 3 are insignificant.

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and, therefore, at the output of the stabilizer, on the load 6.

The increase in efficiency and expansion of the range of variation of the supply voltage of the proposed stabilizer are associated with a decrease in the minimum value., The supply voltage by reducing the voltage drop in the current supply stage of the power supply of the Zener diode 3 by eliminating the voltage of the field-effect transistor from the voltage in the current supply stage of the Zener diode 3. The power dissipated in the resistors 4 and 5 of the divider can be quite small, practically not affecting the QDC stabilizer.

Claims (1)

Invention Formula A parametric voltage regulator containing a reference Zener diode, a field-effect and a bipolar transistors, a first bias resistor, the drain of the field-effect transistor and the collector of the bipolar transistor connected to the input terminal, the base of the bipolar transistor connected to the common bus through the reference zener diode and directly to the first terminal a bias source shunt resistor - gate of a field effect transistor, characterized in that, for the purpose of boosting. Efficiency and expansion of the supply voltage range, a second bias resistor is inserted in it, connected between the gate point of the field-effect transistor with the second output of the first bias resistor and the common bus, and the connection point of the bipolar transistor base with the first output of the bias resistor is connected to the source field effect transistor.