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Compensation Networks for Regulator Circuits

A circuit and control circuit technology, applied in the direction of regulating electrical variables, control/regulating systems, instruments, etc., can solve the problem of the inoperability of the circuit 10

Active Publication Date: 2018-06-26
STMICROELECTRONICS CHINA INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

figure 1 The circuit 10 cannot operate over such a load current range

Method used

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  • Compensation Networks for Regulator Circuits
  • Compensation Networks for Regulator Circuits
  • Compensation Networks for Regulator Circuits

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] now refer to figure 2 , figure 2 An embodiment of a regulator circuit 100 is shown. Circuit 100 includes a power transistor 112 having a power transistor coupled to a voltage source node (V 输入 ) of the first conductive terminal and is coupled to the output node (V 输出 ) of the second conductive terminal. Power transistor 112 may comprise either an n-channel MOSFET device (where the first conductive terminal is the drain node and the second conductive terminal is the source node) or a p-channel MOSFET device (where the first conductive terminal is the source node and The second conductive terminal is the drain node). The control terminal of the power transistor (e.g., the gate node of the MOSFET device) is boosted by the output of the unity-gain voltage buffer circuit 114 with the voltage V 栅极 drive. The input of buffer circuit 114 is coupled to the output of error amplifier circuit 116, which generates error signal Vc. For example, the error amplifier circuit 11...

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PUM

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Abstract

The present invention relates to compensation networks for regulator circuits. A linear regulator includes a driver circuit having an input and an output, wherein the output is configured for driving a control terminal of a power transistor to deliver a load current. An error amplifier functions to amplify the difference between a reference signal and a feedback signal to generate an error signal at the input of the drive circuit. The compensation circuit includes a series circuit formed by a compensation capacitor and a variable resistance circuit, wherein the series circuit is coupled to the input terminal of the driving circuit. A current sensing circuit operates to sense the load current. The resistance of the variable resistance circuit changes in response to the sensed load current.

Description

technical field [0001] The present invention relates to regulator circuits, and in particular to regulator circuits including compensation networks for providing constant bandwidth over a large load current range. Background technique [0002] refer to figure 1 , figure 1 A conventional regulator circuit 10 is shown. Circuit 10 includes a power transistor 12 having a power transistor coupled to a voltage source node (V 输入 ) of the first conductive terminal and is coupled to the output node (V 输出 ) of the second conductive terminal. Power transistor 12 may comprise either an n-channel MOSFET device (wherein the first conductive terminal is the drain node and the second conductive terminal is the source node) or a p-channel MOSFET device (wherein the first conductive terminal is the source node and The second conductive terminal is the drain node). The control terminal of the power transistor (e.g., the gate node of the MOSFET device) is boosted by the output of the unit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
CPCG05F1/562G05F1/575H02M1/0009
Inventor 崔正昊郑鲲鲲
Owner STMICROELECTRONICS CHINA INVESTMENT