Piezoelectric device and drive signal generator

Abstract

The invention provides a piezoelectric device and a driving signal generator. The driving signal generator comprises M paths of driving signal generating units, M is an integer greater than 0, each path of driving signal generating unit comprises an N-bit summator used for accumulating system clocks whose initial values are frequency control words, and N is an integer greater than 0; a flipping comparator which is used for performing negation operation after overflow of the N-bit summator to obtain a first output square wave; a duty ratio adjusting module which is used for determining an output signal in a corresponding period according to the current value of the N-bit summator so as to adjust the duty ratio; and a signal output module which is used for negating the first output square wave to obtain a second output square wave, and adjusting the first output square wave and the second output square wave according to the duty ratio in each period to obtain a first output signal and a second output signal. The driving signal generator is convenient to adjust parameters of any path of driving signals, good in flexibility, simple and convenient.

Description

technical field [0001] The invention relates to the technical field of piezoelectric devices, in particular to a driving signal generator and a piezoelectric device. Background technique [0002] There are currently two main methods for generating driving signals for piezoelectric devices, one is composed of analog circuits, and the other is realized by digital circuits or programs. In related technologies, self-designed circuits or proprietary chips are used to generate piezoelectric device drive signals through DDS (Direct Digital Synthesis) principles, but waveform data tables and digital to analog converters (DACs) are required. , digital-to-analog converter), comparison circuits and other links, so this type of method is relatively complicated, has poor flexibility, and requires more hardware resources or more complicated programs. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a driving signal genera...

AI Technical Summary

Problems solved by technology

In related technologies, self-designed circuits or proprietary chips are used to generate piezoelectric device drive signals through DDS (Direct Digital Synthesis) principles, but all require waveform data tables, digital-to-analog converters (DACs) , digital-to-analog converter), comparison circuits and other links, so this kind of method is relatively complicated, has poor flexibility, and requires more hardware resources or more complicated programs.

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