Signal processing circuit of pressure-sensitive sensor array and method

Abstract

The invention discloses a signal processing circuit of pressure-sensitive sensor array, comprising an M-row-N-column pressure-sensitive sensor array and an excitation source for outputting positive and negative excitation voltage; a positive output short circuit of a sensor unit in the same column of the sensor array is used as an output of the column; the negative output short circuit of the sensor unit of the same column of the sensor array is used as an output of the column; as a result, the whole sensor array has a positive excitation input, a negative excitation input, M row output signals and N column output signals. The signal processing circuit and the method can dramatically reduce the quantity of the sensor output signal lines, reduces the connection area, improves the reliability, reduces the input channel of the following chips, reduces the conversion times from the analog signal to the digital signal and reduces the cost and volume of the whole system.

Description

technical field [0001] The invention belongs to the field of signal processing, in particular to a signal processing circuit and method of a pressure-sensitive sensor array. Background technique [0002] A pressure-sensitive sensor is a sensor that can convert externally applied pressure into an electrical signal. There are many different signal forms such as resistive, capacitive, and piezoelectric. Resistive sensors have developed from the early use of metal sheet resistance strain gauges to the current use of composite materials and nanomaterials (graphene). The volume can be made smaller and smaller, so the scope of application is gradually expanding. [0003] For example, touch buttons made of composite material pressure-sensitive sensors are now used in home appliances and other fields to replace traditional mechanical buttons, and have the advantages of long life, beautiful appearance, and multi-function. Usually, in order to obtain good signal quality, the pressure-...

AI Technical Summary

Problems solved by technology

Although this method uses a pressure-sensitive sensor array to solve the problem, it does not process the signal wiring. The signal lines used in the pressure-sensitive sensor array are still very large, which makes the wiring area larger, which is not conducive to reducing the product volume. It also reduces the reliability of the line and increases the cost

Images