Abstract:
Infrared sensing has lot of applications in research, medical, astronomy, traffic & military
surveillance. Micro-bolometer sensors are widely used in the detection of infrared radiations.
The image from the bolometer depends upon the sensitivity of the sensor & readout
integrated circuit. Each bolometer represents a single pixel of the image. My thesis, basically
focus on the readout circuitry of the sensor. After thorough study of different topologies and
the previous research on the topic, we have designed a readout circuit that meets different
design objectives such as minimum power consumption, less cost & large linearity of the
system. Our mixed signal circuit starts with the analog design of pre-amplifier circuit and
moves towards the digital conversion of the signal. By using software like ORCAD,
MATLAB & mentor graphics we validated the circuit by testing it mathematically & at
circuit & PCB level. For mentor graphics layout design we use the facility of national
institute of electronics (NIE), Islamabad.
