Complementary circulation folding gain bootstrapping operational amplifier circuit with preamplifier

An operational amplifier and pre-amplifier technology, applied in differential amplifiers, DC-coupled DC amplifiers, improving amplifiers to improve efficiency, etc., can solve the problems of slow speed and high power consumption of OTA amplifiers, and improve unity gain bandwidth and speed. , improve the effect of gain

Inactive Publication Date: 2011-05-25
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditional folded-gain bootstrap OTA amplifiers have disadvantages such as slow speed and high power consumption

Method used

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  • Complementary circulation folding gain bootstrapping operational amplifier circuit with preamplifier
  • Complementary circulation folding gain bootstrapping operational amplifier circuit with preamplifier
  • Complementary circulation folding gain bootstrapping operational amplifier circuit with preamplifier

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Embodiment Construction

[0027] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] The invention belongs to the design of ultra-large-scale integrated circuits in the field of microelectronics and solid-state electronics, and relates to a gain bootstrap OTA circuit, which can be used in the design of analog signal processing circuits such as analog-to-digital conversion circuits and filters. Design of high-speed gain bootstrap operational amplifiers in high-performance switched capacitor circuits such as high-speed analog-to-digital converters.

[0029] Circuit structure of the present invention sees figure 1 , the present invention provides a complementary loop folding gain bootstrap operational amplifier circuit with a preamplifier, comprising: a ...

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Abstract

The invention discloses a complementary circulation folding grain bootstrapping operational amplifier circuit with preamplifier, belonging to the technical field of operational amplifier. The circuit comprises a preamplifier formed by N-typed transistors (N1, N2, N3, N4); the unit grained band width of the operational amplifier is improved by the complementary input of P-typed transistors (P, P2, P3, P4) and the N-typed transistors (N16, N17, N18, N19), and using the circulation folding gain bootstrapping operational transconductance amplifier structure. The circuit has the characteristics of high unit gain bandwidth and low power consumption, and confirms to the researching and developing directions of integrated circuits.

Description

technical field [0001] The invention relates to the fields of microelectronics and solid electronics, and relates to an operational amplifier, in particular to a complementary loop folding gain bootstrap operational amplifier circuit with a preamplifier. Background technique [0002] The operational amplifier is one of the most important modules of many analog circuits, and is widely used in analog signal processing circuits such as analog-to-digital conversion circuits and filters. It usually determines the accuracy, speed and power consumption that the high-performance switched capacitor circuit can achieve. In a switched capacitor circuit, the load is usually purely capacitive. At this time, the power consumption of a single-stage operational amplifier (OTA) is better than that of a multi-stage operational amplifier, and a single-stage operational amplifier with a gain bootstrap structure can provide very high gain. . Therefore, the traditional folded gain bootstrap OTA...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/45H03F1/02
Inventor 魏琦赵南杨华中
Owner TSINGHUA UNIV
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