Patent ID: 8078248

Claim:
A digital logic module of oximeter sensor probe connected to an external microprocessor for receiving a control signal, a first light source pulse width modulation signal, a second light source pulse width modulation signal, and a timing output signal from the microprocessor for analysis to obtain a value of blood oxygenation level, the digital logic module of oximeter sensor probe comprising: a detection probe including a light emitting unit and a light sensitive element, the light emitting unit having a first wavelength light source and a second wavelength light source, the light sensitive element capturing lights generated by the first wavelength light source and the second wavelength light source for being transformed into a first electrical signal and a second electrical signal respectively; an operation circuit electrically connected to the light sensitive element of the detection probe for receiving the first electrical signal and the second electrical signal to perform amplifying, demodulating, filtering, and analog-to-digital converting so as to generate a first digital signal and a second digital signal for being transmitted to the microprocessor; and an integrated circuit including a light source driving unit and a light source capturing unit, the light source driving unit electrically connecting to the microprocessor and the first wavelength light source and the second wavelength light source of the light emitting unit, respectively, the light source capturing unit electrically connecting to the microprocessor and the operation circuit, respectively; wherein the microprocessor is configured to output the control signal, the first light source pulse width modulation signal, the second light source pulse width modulation signal, and the timing output signal for driving the light source driving unit and the light source capturing unit to output a data signal to the microprocessor in a first mode, and, to output a first light source driving signal and a second light source driving signal to the first wavelength light source and the second wavelength light source respectively for controlling light emitting cycle, and a first light source capturing signal and a second light source capturing signal to the operation circuit for periodically capturing the first electrical signal and the second electrical signal in a second mode.