BAEK DAVID BOETTCHER,LEMERSAL DONALD BERNARD,LADING LARS
申请号：
IN201747041464
公开号：
IN201747041464A
申请日:
2017.11.20
申请国别(地区):
IN
年份:
2017
代理人:
摘要：
This disclosure provides systems methods and apparatus for performing signal processing in impedance sensing applications and more specifically for recovering data from an amplitude modulated signal. In one aspect a device includes a sensing circuit operable to sense an amplitude modulated signal having a carrier frequency. The device also includes a mixer operable to mix the amplitude modulated signal with a mixing signal having a mixing frequency to provide a frequency downshifted signal having an intermediate frequency less than the carrier frequency. The device also includes a filter operable to filter the frequency downshifted signal to provide a filtered signal. The device further includes a sampler operable to undersample the filtered signal at an undersampling frequency to provide a digital signal the digital signal being representative of a modulating signal.
