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Circuits Containing Voltage Drop Components

A technology of voltage drop components and circuits, applied in the direction of electrical components, amplifiers with semiconductor devices/discharge tubes, and parts of amplifying devices

Active Publication Date: 2021-06-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This voltage will cause transistor MP to compress earlier than transistor Q1, so it is not optimal for linearity

Method used

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  • Circuits Containing Voltage Drop Components
  • Circuits Containing Voltage Drop Components
  • Circuits Containing Voltage Drop Components

Examples

Experimental program
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Embodiment Construction

[0071] The drawings are described in detail below with reference to the accompanying drawings, and the specific aspects of the present invention can be implemented by illustrative purposes. It will be appreciated that other aspects can be utilized without departing from the scope of the invention, and structural or logical changes can be made. Therefore, the following detailed description is not limited, and the scope of the invention is defined by the appended claims.

[0072] It will be appreciated that comments related to the described equipment, circuits or systems are equally applicable to the corresponding methods, and vice versa. For example, if a specific method step is described, the corresponding device can include a unit for performing the described method steps, even if such a unit is not explicitly illustrated or illustrated in the drawings. Further, it will be appreciated that the features of the various exemplary aspects described herein can be combined with each ot...

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Abstract

The present invention relates to a circuit comprising: a circuit input; a circuit output; at least one passive feedback loop coupled between said circuit output and said circuit input; coupled between said circuit input and said circuit input Active elements in the feedforward path of the circuit between the circuit outputs, in particular a DC-coupled operational amplifier (operational amplifier, OPAMP), for driving the at least one feedback loop to establish the function of the circuit . The feedforward path of the circuit includes a second node (Vx) and a first node, wherein the second node and the first node are internal nodes of the active element and are coupled between the circuit input and Between the circuit outputs, the first node has a first voltage that is a function of the circuit outputs. The active element includes a first voltage drop element coupled between the second node (Vx) and the first node, wherein the first voltage drop element is used to convert the DC voltage of the first node to The level is decoupled from the DC level of the second node and provides the level of the first node independent of the DC level of the second node.

Description

Technical field [0001] The present invention relates to a circuit that can be used to perform linear expansion and noise reduction in a DC coupling system. The invention also relates to an analog circuit design, and more particularly to a DC coupling voltage amplifier. Background technique [0002] figure 1 A typical DC coupled analog baseband chain 100 is depicted. In those systems, the signal is enlarged by the Programmable Gain Amplifier, the PGA 101, which is filtered by a low passfilter, referred to as LPF) 102, and then transmitted to the driver (Driver, referred to as DRV) 103. in. Active block is obtained by a closed-loop DC coupled voltage amplifier or an operational amplifier (OPAMP) 111, 112, 113. Key features of opamp include noise, linear and power consumption. [0003] Since the useful signal also includes a DC component, the DC common mode must be propagated along the chain, and each block on the chain (PGA 101, LPF 102, and DRV 103) need to conform to the DC comm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32H03F3/45
CPCH03F3/20H03F3/45098H03F3/45103H03F2203/45722H03F1/3211H03F2203/45701H03F3/45475H03F2200/408H03F2200/447H03F2200/513H03F2203/45101H03F2203/45372H03F2203/45512H03F2203/45522H03F2203/45528H03F2203/45594H03F2203/45628H03F2203/45631H03F2203/45646H03F2203/45672H03F2203/45681H03F2203/45691H03F1/302H03F3/45201H03F2203/45626H03F3/45206
Inventor 朱塞佩·格拉美亚
Owner HUAWEI TECH CO LTD
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