Infrared Biosensor Test System under Pulsed Bias Voltage
Infrared biosensor has been a hot area of research for several years in infrared field. This paper proposes a method to test infrared biosensor array which is not bonding with ROIC. The presented ROIC-less infrared biosensor is encapsulated in a vacuum chip scale packaging, and we design the off-chip “ROIC” in order to read out signal of infrared biosensor. It is necessary to apply bias voltage on pixels when infrared biosensor works, we gave a simulation of infrared biosensor in pulsed bias votage mode according to the infrared biosensor heat balance equation. Based on the simulation result, we have implemented the test system for ROIC-less and small-scale infrared biosensor array. We use FPGA as main controller to readout the infrared signal and transfer the data to PC via USB interface.