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Extra-low voltage continuous time auto-zero nava power consumption transconductance amplifier

A transconductance amplifier, self-zeroing technology, applied in differential amplifiers, DC-coupled DC amplifiers, improving amplifiers to improve efficiency, etc., can solve problems such as offset, and achieve the effects of reduced power consumption, easy integration, and low cost

Active Publication Date: 2015-10-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amplifier solves the problem of offset and 1 / f noise of the very low voltage nanowatt power amplifier, its operating voltage can be as low as 0.5V, and the power consumption can be as low as less than 100nW

Method used

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  • Extra-low voltage continuous time auto-zero nava power consumption transconductance amplifier

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Embodiment Construction

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0032] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or e...

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Abstract

The invention discloses an extra-low voltage continuous time auto-zero nava power consumption transconductance amplifier. The extra-low voltage continuous time auto-zero nava power consumption transconductance amplifier comprises a main amplifier which comprises the main amplifier comprises an input differential pair, a feedback differential pair, a cross coupling transconductance enhancement structure and a Cascode resistance level; an auxiliary amplifier which comprises an input differential pair, a feedback differential pair and a Cascode resistance level and is used for suppressing the imbalance of the main amplifier after eliminating the self imbalance; and a sampling capacitor and a low voltage switch, wherein the sampling capacitor and the low voltage switch are used for sampling and compensating the imbalance of the auxiliary amplifier. The amplifier solves the problems of the imbalance of the extra-low voltage nava power consumption amplifier and l / f noise; the work voltage of the amplifier can be as low as 0.5V, and the power consumption can be as low as below 100 nW. According to the invention, the amplifier has broad application foregrounds in the fields of biological chips, medical electronics and internet of things, etc.

Description

technical field [0001] The invention relates to the technical field of analog integrated circuit design, in particular to an ultra-low voltage continuous time self-adjusting nanowatt power consumption transconductance amplifier. Background technique [0002] In recent years, the introduction and development of the concept of the Internet of Things has greatly promoted the development of sensors and their interface circuits. In some special application areas, such as implantable biochips, the power consumption of the sensor interface circuit will be the designer's primary consideration. In some designs, people began to use remote power supply or energy harvesting technology to solve the power supply problem of biochips. Due to the limitations of these two technologies, the supply voltage that can be provided is unstable and very low, and the supply power is also limited. People hope that the biochip can work for a long time, which requires that the sensor interface circuit ...

Claims

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Application Information

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IPC IPC(8): H03F1/02H03F1/32H03F3/45
Inventor 方华军凌童向志鹏许军王敬梁仁荣
Owner TSINGHUA UNIV
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