Heart rhythm recognition circuit and method with high reliability and low calculation load suitable for wearable devices
A wearable device and identification circuit technology, which is applied in the measurement of pulse rate/heart rate, application, diagnostic recording/measurement, etc., can solve the problems of not being able to meet the further needs of health, original signal interference, and high calculation load, and achieve low power consumption, Effects with low requirements and low signal-to-noise ratio
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[0026] Describe technical scheme of the present invention in further detail below in conjunction with accompanying drawing: as figure 1 As shown, F1 is a low-pass filter, F2 is a high-pass filter, K is the control logic, P2 is the normally open software phase-locked loop, P2 covers the common heart rate range of the human body (60-90 beats per minute), P1, P3 , P4 is the backup software phase-locked loop, the normally open software phase-locked loop and the backup software phase-locked loop effectively lock the frequency range to cover the possible heart rate range of the whole human body (45-200 beats per minute). In addition to outputting the heart rate, each phase-locked loop also outputs valid locking signal strength and frequency overflow flags. Each phase-locked loop can also be independently enabled, and the control logic can turn off or turn on each phase-locked loop.
[0027] The P2 PLL cannot be shut down and is always running. In most cases, only the P2 PLL is runn...
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