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ULTRA-LOW POWER CONSUMPTION ELECTRODELESS CAPACITOR VOLUME MEASUREMENT CIRCUIT AND METHOD APPLICABLE IN HEART RATE MONITORING
ULTRA-LOW POWER CONSUMPTION ELECTRODELESS CAPACITOR VOLUME MEASUREMENT CIRCUIT AND METHOD APPLICABLE IN HEART RATE MONITORING
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机译：超低功耗电容式电容测量电路和方法，适用于心率监测
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摘要
Ultra-low power consumption electrodeless resistor volume measurement circuit and method applicable in heart rate measurement monitoring. The circuit comprises pulse signal source P, integrating capacitor C1, sampling capacitor C2, operational amplifier OPA1, a bandpass filter, analog switch SW1, analog switch SW2, analog switch SW3, an analog-to-digital converter, an MCU, and two skin contact ends. Analog switch SW2 is connected to integrating capacitor C1. An output of integrating capacitor C1 is connected to sampling capacitor C2 via analog switch SW3. An output of sampling capacitor C2 is connected to an input of operational amplifier OPA1. An output of operational amplifier OPA1 is connected to the bandpass filter. An output of the bandpass filter is connected to the MCU. The need for inert noble metal electrodes is obviated, the need to apply in advance an electrically-conductive paste is obviated, measurement is not affected by sweating of the human body, at the same time, advantages of low costs and ultralow power consumption are provided. This is applicable in a high-performance intelligent wearable device.
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