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Miller resistor compensating circuit

A technology of resistance compensation and capacitance compensation, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve problems such as disadvantageous circuit cost savings

Active Publication Date: 2015-01-28
长沙瑞达星微电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The Miller effect is widely used in the design of integrated circuits. The Miller effect of the capacitor can achieve the effect of a large capacitor with a smaller capacitor, which can simplify the circuit design and save the circuit cost. The Miller effect of the resistor is the opposite. Large resistors achieve the effect of smaller resistors, which is not conducive to saving circuit costs, so they are rarely used

Method used

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Embodiment Construction

[0011] The structure and working process of a Miller resistance compensation circuit disclosed in the invention will be described in detail below in conjunction with the accompanying drawings.

[0012] A Miller resistance compensation circuit disclosed by the present invention consists of two parts, such as figure 2 As shown, it is composed of the main circuit and Miller resistance compensation circuit, and the Miller resistance compensation circuit is composed of feedback resistor string, compensation capacitor, Miller compensation resistance, and operational amplifier.

[0013] The main circuit is other circuit parts except the Miller resistance compensation circuit in the circuit adopting the Miller resistance compensation network of the present invention, and is used to realize specific circuit functions.

[0014] The Miller resistance compensation circuit is composed of feedback resistor string, compensation capacitor, Miller compensation resistor and operational amplifi...

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Abstract

A miller effect is widely applied to the design of an integrated circuit and can effectively change the equivalent impedance of a node. The invention discloses a method for realizing zero compensation by utilizing the miller effect of a resistor and a pair of zero poles of a separate feedback resistor string. A circuit is mainly composed of a main circuit and a miller resistance compensating circuit, wherein the compensating circuit consists of the feedback resistor string, an operational amplifier, a miller resistor and a compensation capacitor.

Description

technical field [0001] The invention designs a miller resistance compensation circuit, which belongs to the field of integrated circuit design. Background technique [0002] The Miller effect is widely used in the design of integrated circuits. The Miller effect of the capacitor can achieve the effect of a large capacitor with a smaller capacitor, which can simplify the circuit design and save the circuit cost. The Miller effect of the resistor is the opposite. Larger resistors achieve the effect of smaller resistors, which is not conducive to saving circuit costs, so they are rarely used. [0003] Miller benefit: if figure 1 The circuit in (a) can be transformed into figure 1 The circuit of (b) has in A V = V Y V A . Contents of the invention [0004] The present invention utilizes the Miller effect of the resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/46
Inventor 李亚
Owner 长沙瑞达星微电子有限公司