David Boettcher Baek,Donald Bernard Lemersal,Lars Lading
申请号：
US14795703
公开号：
US20170007186A1
申请日:
2015.07.09
申请国别(地区):
US
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.
