Programmable sensor signal processing device adopting switched capacitor mode

Abstract

The invention discloses a programmable sensor signal processing device adopting a switched capacitor mode. The programmable sensor signal processing device comprises a first programmable switched capacitor bank, a second programmable switched capacitor bank, a programmable master fully differential operational amplifier, a first programmable slave fully differential operational amplifier, a secondprogrammable slave fully differential operational amplifier, an output multiplexer and an output control module. A fully differential switched capacitor working mode is adopted, the fully differential circuit has the advantages of being high in common-mode rejection ratio, large in signal swing and high in linearity, common noise can be effectively suppressed, the signal to noise ratio is increased, harmonic distortion is reduced, and the programmable sensor signal processing device is particularly suitable for reading sensor signals.

Description

technical field [0001] The invention belongs to the technical field of programmable analog device structures, and in particular relates to a programmable sensor signal processing unit structure in the form of switched capacitors, which is suitable for various sensor interface circuits, general signal amplification, addition and subtraction, calculus and filtering And other application circuits, and programmable analog signal processing array structure design. Background technique [0002] With the rapid development of science and technology in modern society, people's demand for intelligent electronics is getting higher and higher, and intelligent electronic products are inseparable from the real-time collection of weak analog signals from the outside world by sensors, making sensing technology the most developed in this century. One of the potential new technologies. The analog quantity collected by the sensor is very weak, and needs further processing such as amplificatio...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of diversity and high design cost of different sensor signal interface circuits, and propose a general-purpose programmable analog processing device in a switched capacitor mode suitable for multiple sensor signal readout and analog signal processing, which can To achieve the purpose of modifying the function and performance of the circuit through programming configuration without changing the hardware circuit, realizing the function of processing output signals of various sensors, realizing rapid development and verification, and reducing costs

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