Programmable analog unit for sensor signal processing

Abstract

The invention discloses a programmable analog unit for processing a sensor signal, which comprises a first programmable switched capacitor group, a second programmable switched capacitor group, a programmable main fully differential operation amplifier, a first programmable auxiliary fully differential operation amplifier, a second programmable auxiliary fully differential operation amplifier, an output multiway selector and an output control module, wherein the first programmable switched capacitor group is used for receiving an external sensor differential signal; the second programmable switched capacitor group is used for receiving an external sensor differential signal; the programmable main fully differential operation amplifier is used for generating and outputting a main fully differential signal after signal processing; the first programmable auxiliary fully differential operation amplifier is used for generating and outputting an auxiliary fully differential signal; the second programmable auxiliary fully differential operation amplifier is used for generating and outputting an auxiliary fully differential signal; the output multiway selector is used for selecting and outputting one way of differential output signal; and the output control module is used for generating and outputting a positive-negative reverse-phase or modulated differential output signal. The programmable analog unit for processing the sensor signal can read out small capacitance and small voltage sensing signals and process analog signals, is applied to sensor signal detection of physical quantities such as an angular velocity, an accelerated velocity and the like, and is suitable for circuits of an FPAA (field programmable analog array), a FPMA (fixed preassigned multiple access) and a PSOC (programmable system on chip).

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 high-tech. The analog quantity collected by the sensor is very weak, and needs further processing such as amplification and f...

AI Technical Summary

Problems solved by technology

[0006] The object 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 unit 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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