Patent ID: 9008229
Filing Date: 2015-04-14
Classification: G04R

Abstract:
1. A device configured to obtain a Radio Controlled Clock (RCC) signal comprises: a receiving circuit configured to receive an analog AM RCC signal and to process said analog AM radio RCC signal to generate a digital AM RCC signal; a demodulation circuit configured to be in connection with said receiving circuit to demodulate said digital AM RCC signal to generate said RCC signal; wherein the receiving circuit includes: an antenna; an analog quadrature mixing circuit configured to connect with the antenna, wherein said output of the analog quadrature mixing circuit including a first output branch and a second output branch; a quadrature local oscillator circuit configured to connect with said analog quadrature mixing circuit; a first analog low-pass filter configured to connect with said first output branch; a second analog low pass filter configured to connected with said second output branch; a first analog to digital converter configured to connect with said first analog low-pass filter; a second analog to digital converter configured to connect with said second analog low-pass filter; a digital quadrature mixing circuit configured to connect with said first analog to digital converter and said second analog-to digital-converter, wherein the output of said digital quadrature mixing circuit including a third output branch and a fourth output branch; a quadrature digital local oscillator circuit configured to connect with said digital quadrature mixing circuit; a first digital low pass filter configured to connect with said third output branch at one end and to connect with said demodulation circuit at the other end; a second digital low pass filter configured to connect with said fourth output branch at one end and to connect with said demodulation circuit at the other end.