公开(公告)号：US09419660B2

公开(公告)日：2016-08-16

申请号：US14530296

申请日：2014-10-31

Applicant: The Swatch Group Research and Development Ltd.

Inventor： Arnaud Casagrande ,  Carlos Velasquez ,  Emil Zellweger

IPC: H04B17/00 ,  H04B1/10 ,  H04B15/06

CPC classification number: H04B1/1027 ,  H04B15/06 ,  H04B17/21 ,  H04B17/29 ,  H04B2001/1054

Abstract: The signal receiver has means to suppress at least one higher harmonic component from a MEMS or crystal oscillator having a reference resonator in filtered intermediate signals of a signal receiver. The signal receiver comprises an antenna for receiving electromagnetic signals, a low noise amplifier for amplifying signals received by the antenna, one MEMS or crystal oscillator comprising a reference resonator to generate an oscillating signal with a predefined duty-cycle, a mixer for mixing the amplified and received signals with the oscillating signal to generate intermediate signals, a band-pass filter to filter the intermediate signals, and a duty-cycle controller coupled to the MEMS or crystal oscillator and coupled to the output of the band-pass filter to analyze the spectrum of the filtered intermediate signals and to modify the duty-cycle of the oscillating signal in response to the spectrum analysis of the filtered intermediate signals.

Abstract translation: 信号接收机具有在信号接收机的经滤波的中间信号中抑制来自具有参考谐振器的MEMS或晶体振荡器的至少一个高次谐波分量的装置。 信号接收机包括用于接收电磁信号的天线，用于放大由天线接收的信号的低噪声放大器，包括参考谐振器的一个MEMS或晶体振荡器，以产生具有预定占空比的振荡信号;混频器，用于混合放大 并且用振荡信号接收信号以产生中间信号，滤波中间信号的带通滤波器和耦合到MEMS或晶体振荡器并耦合到带通滤波器的输出的占空比控制器，以分析 频谱，并响应于滤波的中间信号的频谱分析来修改振荡信号的占空比。