Physiological signal conditioning circuit and physiological signal acquisition system

Physiological signal conditioning circuit and physiological signal acquisition system

  • CN 105,286,793 B
  • Filed: 10/12/2015
  • Issued: 08/28/2020
  • Est. Priority Date: 10/12/2015
  • Status: Active Grant
First Claim
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1. A physiological signal conditioning circuit comprises a first amplifying circuit, a direct current eliminating circuit, a second amplifying circuit and a charge holding circuit which are connected in sequence,the input end of the first amplifying circuit is connected to the output end of the physiological signal detecting module;

  • the charge holding circuit is used for holding the charge of the signal output by the second amplifying circuit, the output end of the charge holding circuit is connected to the input end of the analog-digital converter,the physiological signal detection module comprises a driving circuit, a light emitter and a photoelectric detector, the driving circuit is used for generating a driving signal, the light emitter is used for emitting pulsed light to an object to be detected under the driving of the driving signal, the photoelectric detector is used for receiving the pulsed light transmitted by the object to be detected and outputting a physiological signal, the driving signal comprises a switching signal, and the switching signal is used for controlling the pulse width of the pulsed light, so that the pulse width of the pulsed light is less than 250 microseconds.

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