High-sensitivity current amplification circuit and chip thereof

A technology of current amplification and high sensitivity, which is applied in the direction of measuring current/voltage, amplifier, and current-only measurement. It can solve the problems of slow conversion speed and low sensitivity of the current amplification circuit, and achieve fast speed, high controllability, and current amplification. high efficiency effect

Active Publication Date: 2019-10-18
佛山市顺德区蚬华多媒体制品有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the disadvantages of slow conversion speed and low sensitivity of the existing current amplification circuit, the present invention provides a current that can be rapidly amplified, and is compatible with both digital and analog circuit modes. The working range of the amplifying circuit is wide and the magnification factor is controllable. The current amplifier circuit and its chip

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  • High-sensitivity current amplification circuit and chip thereof
  • High-sensitivity current amplification circuit and chip thereof
  • High-sensitivity current amplification circuit and chip thereof

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Embodiment Construction

[0026]In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with its embodiments; it should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention. invention. Other systems, methods and / or features of this embodiment will become apparent to those skilled in the art after reviewing the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the following claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the following detailed description.

[0027] In the drawings of the embodiments of the present invention, the same or similar symbols correspond to the ...

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Abstract

The invention provides a high-sensitivity current amplification circuit and a chip thereof. The high-sensitivity current amplification circuit comprises a current amplification module, a high-low level output module and a voltage conversion unit; the current amplification module is used for amplifying the circuit current through a current replication circuit consisting of two groups of PMOS (positive Metal Oxide Semiconductor) tubes, and comprises an upper-stage PMOS tube group and a lower-stage PMOS tube group; the high-low level output module is a high-low level trigger composed of a PMOS transistor and an NMOS transistor; according to the current amplification circuit and the chip thereof, rapid current amplification can be achieved, two circuit modes of digital electricity and analog electricity are compatible, the working range of the amplification circuit is wide, and the amplification factor is controllable.

Description

technical field [0001] The invention relates to the field of current amplification, in particular to a high-sensitivity current amplification circuit and a chip thereof. Background technique [0002] The photodetector captures the radiant energy of light through the photoelectric effect, outputs a weak current signal, and realizes the conversion from optical signal to electrical signal. In the field of weak signal measurement such as photocurrent, the process of measuring weak signals is extremely susceptible to interference from environmental factors, and in severe cases, weak signals may even be submerged in background noise. In the measurement of this kind of weak signal, a tiny defect in a certain link will seriously deteriorate the measurement accuracy. Since the current signal output by the detector is very weak, the signal must be amplified and then transmitted. Due to the influence of background noise, circuit noise, and component noise, it is difficult to output an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/21H03F3/213H03F1/02H03F1/26G01R19/00
CPCH03F3/211H03F3/213H03F1/0211H03F1/26G01R19/0092H03F2200/372
Inventor 邓自然黄宇传姜亚敏王书方
Owner 佛山市顺德区蚬华多媒体制品有限公司
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