Patent ID: 11864866
Assignee: CORTIRIO LIMITED
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 8:
9. A method according to claim 8, wherein the first measurement mode is implemented by:
holding each photodiode pair in a reverse bias state where a first bias voltage Vbn is applied to an anode of the first photodiode of the photodiode pair and a second bias voltage Vbp is applied to a cathode of the second photodiode of the photodiode pair, and a measurement voltage Vm is applied at the cathode of the first photodiode connected to the anode of the second photodiode, said measurement voltage a voltage level between the first bias voltage and second bias voltage, and
measuring an output of each photodiode pair corresponding to a difference in the light detected of the photodiode pair by measuring the current output at the cathode of the first photodiode connected to the anode of the second photodiode.