Anand Hariraj Udupa,Jagannathan Venkataraman,Hussam Ahmed P,Sandeep Kesrimal Oswal
申请号：
US14694500
公开号：
US10006950B2
申请日:
2015.04.23
申请国别(地区):
US
年份:
2018
代理人:
摘要：
The disclosure provides a circuit for impedance measurement. The circuit includes an excitation source that generates an excitation signal. A switched resistor network is coupled to the excitation source, and generates an output signal in response to the excitation signal. A sense circuit is coupled to the switched resistor network, and generates a sense signal in response to the output signal. A comparator is coupled to the sense circuit, and generates a clock signal in response to the sense signal. A mixer is coupled to the sense circuit, and multiplies the sense signal and the clock signal to generate a rectified signal. A low pass filter is coupled to the mixer and filters the rectified signal to generate an averaged signal. A processor is coupled to the low pass filter and measures a body impedance from the averaged signal.
