SU1448385A1 - Variable l-shaped voltage divider - Google Patents

Abstract

The invention relates to: automation, radio engineering, electrical measuring equipment, electrical engineering. Mb used in closed automatic control systems. The purpose of the invention is to reduce nonlinear distortion by reducing the value of a. yarn interference caused by the voltage of the control signal at the output. The device contains two field-effect transistors (PT) 1 and 2, three resistors 5-7, a control signal source IO (IUS). PT 3 and 4, resistors 8 and 9 and IUS II are entered into the device. Since the control voltage levels of the PT 1-4 are equal, the resistances of their channels are also equal, this allows you to expand the range of the output voltage of the device and reduce the nonlinear distortion in the form that the control current PT 3 and 4 does not flow through them -channels and because of this reduced interference at the output of the device, caused by the passage of voltage from the control circuit. IUS 10 and I are regulated (synchronous. 1 ill. (L

Description

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The invention relates to automation, radio engineering, electrical engineering and electrical engineering and can be used in closed automatic control systems, such as in electronic voltage and current stabilizers in a closed stabilization circuit.

The aim of the invention is to reduce α-Non-linear distortion by reducing the magnitude of the interference voltage due to the appearance of a control signal voltage at the output.

The drawing shows a circuit diagram of a flexible, controlled l-shaped voltage divider.

Controlled. The L-shaped voltage divider contains the first to fourth field effect transistors 1-4, first. the output resistors 5–9, the first JO, and the second 11 control signal sources.

The controllable voltage divider operates as follows.

When a controlled L-shaped voltage divider is fed to the input, the signal passes through the first resistor 5 and the channel of the fourth field-effect transistor 4 and the input current flows into two components, one of which flows through the channel of the third field-effect transistor 3 and the other through the resistors 8 and 9, providing. Negative feedback voltage level required. Next, both current components flow through the channel of the second field-effect transistor 2 again splits into two components, one of which flows through the channel of the first field-effect transistor 1 and the other through resistors 6 and 7 and the output resistance of the first source 10 of the control signal, providing the required level of negative feedback.

Output Voltage Pack :; An equal L-shaped voltage divider is proportional to the resistance of field-effect transistors 1-4, which is determined by the output voltage level of the control signal sources 10 and 11.

Resistances of resistors 6-9 should be selected from the condition where Rg-R, are respectively the resistances of resistors 6-9, Ycc is the resistance of the field trans channel

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Claims (1)

zistor riocKOjribKy the control voltage levels of field-effect transistors 1-4 are equal, the resistances of their channels are also equal, which allows to expand the range of the output voltage of the controlled L-shaped voltage divider and reduce the nonlinear voltage, since the control current field-effect transistors 3 and 4 do not flow through their channels. In addition, due to the fact that the control current of the field-effect transistors 3 and 4 does not flow through their channels and the following: the latter are connected between the channel of the second field-effect transistor 2 and the first resistor 5, the interference is reduced at the output of the controlled L-shaped voltage divider, caused by the passage of voltage from the control circuit. Invention Formula A controlled L-shaped divider. The voltage containing the first resistor in the transverse arm, in the longitudinal - the first and second field-effect transistors, the gates of which are combined and connected through the second resistor to the source connection point of the second field-effect transistor, and also the third a resistor connected to the combined gates of the first and second field-effect transistors, and the first control signal source connected by the inter-remote control by another output of the third resistor and the common bus, the source of the first field The transistor is connected to a common bus, characterized in that, in order to reduce non-linear distortions by reducing the magnitude of the interference voltage caused by the appearance of a control signal voltage at the output, the third and fourth field-effect transistors are introduced into it, The field-effect transistor is connected to the drain of the second and to the source of the fourth field-effect transistors, respectively, the drain of the fourth field-effect transistor is connected to the first resistor, as well as the fourth resistor connected to the source by one pin tego FET n ty resistor, one terminal connected to the source of the fourth FET, and a second control signal source connected between a connection point. 1448385 other pins of the fifth and fourth zistors, while the sources of control resistors and the combined gates of the matching signal are adjusted in sync of the third and fourth field tranron.