公开(公告)号：US4099125A

公开(公告)日：1978-07-04

申请号：US699020

申请日：1976-06-23

申请人： Robert McKay Bennett, Jr. ,  James Leslie Osborn

发明人： Robert McKay Bennett, Jr. ,  James Leslie Osborn

IPC分类号： H03L7/07 ,  H04Q1/446 ,  H04B1/26 ,  H03B3/06

CPC分类号： H04Q1/446 ,  H03L7/07

摘要： A circuit for correcting frequency errors in an incoming signal that includes a particular frequency signal. The circuit includes dual phase locked loop circuitry for providing a frequency feedback control, detecting circuitry for detecting the presence of the particular coded signal and generating a hold signal, and a sample and hold circuitry disposed in the feedback path of the phase locked loop circuitry and responsive to the hold signal for setting the feedback control at a particular value to provide an optimal frequency error correction for the particular frequency signal and for holding the feedback control at the particular value for the entire spectrum of the incoming signal, whereby the frequency feedback control set for the particular frequency tone is used for the entire spectrum of the incoming signal to minimize the error in the output frequencies of the circuit.

摘要翻译： 一种用于校正包括特定频率信号的输入信号中的频率误差的电路。 该电路包括用于提供频率反馈控制的双锁相环电路，用于检测特定编码信号的存在和产生保持信号的检测电路以及设置在锁相环电路的反馈路径中的取样和保持电路，以及 响应于保持信号将反馈控制设置在特定值，以为特定频率信号提供最佳频率误差校正，并将反馈控制保持在输入信号的整个频谱的特定值，由此频率反馈控制 为特定频率设置的信号用于输入信号的整个频谱，以最小化电路输出频率的误差。