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Application circuit of low noise Op-amp TC75S67TU for pulse sensor

The application circuit to the pulse sensor of the photon detection system of low noise level Op-amp TC75S67TU. Describes design guidance of the small pulse sensor circuit

Circuit of application circuit of low noise Op-amp TC75S67TU for pulse sensor.
Waveforms of application circuit of low noise Op-amp TC75S67TU for pulse sensor.


  • The pulse sensor circuit using low noise Op-amp TC75S67TU
  • Introduction of application of the TC75S67TU for pulse sensor
  • Describes usage and precautions of the TC75S67TU in designing of pulse sensor


  • Super low noize level
  • Wearable on body
  • Small board size

Reference design files

Design, Document

“Design・Document” contains the documents listed below.

Design, File

“Design・File” contains the contents listed below.

*1:Actual PCB was designed on CR5000BD.The other files were made from CR5000BD file.
*2: The data was generated on CR5000BD.

Toshiba items

Part Number Device Category Portion Usage Description
TC75S67TU Op-amp

I-V converter・1

VNI=6nV/√Hz(typ)@VDD=2.5V / UFV(SOT-353F)
TC75S54FU Op-amp Bias voltage generater VDD、VEE=±0.9 to 3.5V (SOT-353)


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