公开(公告)号：US06979995B2

公开(公告)日：2005-12-27

申请号：US10654974

申请日：2003-09-05

申请人： Yasuaki Horio ,  Masaaki Nikkuni ,  Masahiko Moriya ,  Hiroki Yoshino

发明人： Yasuaki Horio ,  Masaaki Nikkuni ,  Masahiko Moriya ,  Hiroki Yoshino

IPC分类号： G01L9/00 ,  G01R23/10 ,  G04F10/04 ,  G04F10/10 ,  H03K5/06 ,  G01R23/14 ,  G06M1/10

CPC分类号： G01R23/10 ,  G01L9/0008 ,  G04F10/04 ,  G04F10/105 ,  H03K5/06

摘要： A time difference signal having a pulse width corresponding to the time difference between an output of a resonant pressure sensor and a reference clock is prepared. The pulse width of the time difference signal is expanded by a given magnification. Based on a count value obtained by counting the reference clock during the expanded pulse width and a count value obtained by counting the reference clock during one cycle of the output of the resonant pressure sensor or a period which is integer times as long as the one cycle, the output frequency of the resonant pressure sensor is obtained. It is possible to obtain the fast processing and the high resolution without increasing the frequency of the reference clock.

摘要翻译： 准备具有对应于谐振压力传感器的输出与基准时钟之间的时间差的脉冲宽度的时间差信号。 时间差信号的脉冲宽度以给定的放大率扩大。 基于通过对扩展脉冲宽度期间的基准时钟进行计数而获得的计数值，以及通过对共振压力传感器的输出的一个周期期间的基准时钟进行计数而得到的计数值，或者是一个周期的整数倍的周期 得到共振压力传感器的输出频率。 可以在不增加参考时钟的频率的情况下获得快速处理和高分辨率。