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Low-power-consumption wide-range operational transconductance amplifier

An operational amplifier, wide-ranging technology, applied in the electrical field, can solve the problems of power consumption, input and output range gain, operation speed and operation accuracy restriction, etc., to achieve the effect of high gain bandwidth

Inactive Publication Date: 2016-09-21
西安电子科技大学昆山创新研究院 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the threshold voltage of the MOSFET limits the application of the op-amp in a low-voltage environment, and its power consumption, input and output range, gain, operation speed, and operation accuracy are all restricted.

Method used

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  • Low-power-consumption wide-range operational transconductance amplifier

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Embodiment Construction

[0044] The transconductance operational amplifier of the present invention is a multi-stage amplifier using substrate driving technology, which can not only effectively reduce the operating voltage of the circuit to reduce power consumption, but also expand the output range and gain bandwidth.

[0045] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0046] Referring to Fig. 3(a) and Fig. 3(b), the low power consumption wide range transconductance operational amplifier of the present invention includes: a differential input stage, a gain stage, an output stage and a self-bias circuit. Among them, the differential input stage is composed of the first differential input stage and the second differential input stage, the output stage is composed of an output amplifier, compensation and overcurrent protection circuit, and the self-bias circuit can generate three bias voltages of vb1, vb2 and vb3 ....

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Abstract

The invention discloses a low-power-consumption wide-range operational transconductance amplifier which comprises a first stage of differential input stage, a second stage of differential input stage, a gain stage, an output stage and a self-biased circuit. An input signal is input into an input end of the first stage of differential input stage; a bias voltage vb3 loaded to the first stage of differential input stage is generated by the self-biased circuit; an output end of the first stage of differential input stage is connected to an input end of the second stage of differential input stage; bias voltages vb1 and vb2 required by the second stage of differential input stage are generated by the self-biased circuit; an output end of the second stage of differential input stage is connected to an input end of the gain stage; and an output end of the gain stage is connected to an output amplifier in the output stage and a compensation and overcurrent protection circuit. The low-power-consumption wide-range operational transconductance amplifier has the beneficial effects that 1, the low-power-consumption wide-range operational transconductance amplifier has lower power consumption; 2, the low-power-consumption wide-range operational transconductance amplifier has a wider input and output range; and 3, the low-power-consumption wide-range operational transconductance amplifier has a higher gain bandwidth.

Description

technical field [0001] The invention relates to a multi-stage transconductance operational amplifier, in particular to a multi-stage transconductance operational amplifier with low power consumption and wide range, belonging to the field of electrical technology. Background technique [0002] The continuous improvement of semiconductor process feature size and integration level provides reliable technical support for the development of portable medical products, thus promoting portable heart with small size, low cost, friendly human-computer interaction interface, and can successfully complete some daily monitoring needs. The development of electrical monitoring equipment can perform good data collection, storage, sending and receiving of vital signs that need to be monitored, and provide feedback to users. Among them, ΣΔADC adopts technologies such as oversampling, noise shaping and continuous-time loop filtering, which can achieve 8-24-bit high resolution and a wide range ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/02H03F1/48H03F3/45
CPCH03F1/0205H03F1/483H03F3/45179H03F2200/331H03F2203/21148
Inventor 李娅妮汤子月朱樟明杨银堂王旭
Owner 西安电子科技大学昆山创新研究院
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