公开(公告)号：US20220006676A1

公开(公告)日：2022-01-06

申请号：US17115805

申请日：2020-12-09

Applicant: RichWave Technology Corp.

Inventor： Ching Shou Huang

IPC: H04L27/152 ,  H04L7/033 ,  H03L7/099

Abstract: A frequency modulation demodulation device and a control method thereof are provided. The frequency modulation demodulation device includes an input terminal, a phase converter, a phase-locked loop circuit, and a frequency offset/shift detector. The input terminal receives an input signal. The phase converter is coupled to the input terminal and receives the input signal to obtain a phase signal. The phase-locked loop circuit is coupled to the phase converter to generate a phase adjustment signal according to the phase signal, and the phase-locked loop circuit adjusts the phase signal according to the phase adjustment signal to perform demodulation of the input signal. The frequency offset/shift detector is coupled to the phase-locked loop circuit and generates a frequency offset/shift determining signal according to the phase adjustment signal obtained from the phase-locked loop circuit. The frequency offset/shift determining signal is related to a phase frequency offset/shift of the input signal.

公开(公告)号：US11362870B2

公开(公告)日：2022-06-14

申请号：US17115805

申请日：2020-12-09

Applicant: RichWave Technology Corp.

Inventor： Ching Shou Huang

IPC: H04L27/152 ,  H03L7/099 ,  H04L7/033 ,  H03L7/093

Abstract: A frequency modulation demodulation device and a control method thereof are provided. The frequency modulation demodulation device includes an input terminal, a phase converter, a phase-locked loop circuit, and a frequency offset/shift detector. The phase converter receives an input signal to obtain a phase signal. The phase-locked loop circuit generates a phase adjustment signal according to the phase signal and adjusts the phase signal according to the phase adjustment signal to perform demodulation of the input signal. The phase-locked loop circuit performs signal alignment and signal compensation on the phase signal to generate a filtered phase signal. The phase adjustment signal provides a feedback of and adjusts the phase signal. The frequency offset/shift detector generates a frequency offset/shift determining signal according to the phase adjustment signal. The frequency offset/shift determining signal is related to a phase frequency offset/shift of the input signal.