公开(公告)号：US20150137728A1

公开(公告)日：2015-05-21

申请号：US14369815

申请日：2012-12-19

Applicant: Magna E-ar Systems of America, Inc.

Inventor： Thomas J. Wand ,  Roger Douglas

IPC: G05B19/31 ,  G01R1/20 ,  G01R1/30 ,  G01D5/14 ,  G01R25/00

CPC classification number: G05B19/31 ,  G01D5/14 ,  G01R1/203 ,  G01R1/30 ,  G01R19/04 ,  G01R19/175 ,  G01R25/00

Abstract: A circuit is provided for detecting peaks of a sinusoidal input signal includes circuitry for generating first and second sinusoidal output signals that are out of phase with one another and with the sinusoidal input signal. A comparator block compares the sinusoidal output signals to determine instances where the amplitudes of the first and second sinusoidal output signals cross over each other. The sinusoidal output signals may lead the sinusoidal input signal somewhat so that, after taking into account processing delay, the indicated crossover instances substantially coincide with peaks in the sinusoidal input signal such that a trigger signal generated by the circuit accurately indicates the timing of the peaks.

Abstract translation: 提供用于检测正弦输入信号的峰值的电路，包括用于产生彼此异相和正弦输入信号的第一和第二正弦输出信号的电路。 比较器块比较正弦输出信号以确定第一和第二正弦输出信号的幅度彼此交叉的情况。 正弦输出信号可能导致正弦输入信号有些使得在考虑了处理延迟之后，所指示的交叉实例基本上与正弦输入信号中的峰值一致，使得由电路产生的触发信号准确地指示峰值的定时 。