Low noise design of a buffered direct injection transconductance preamplifier for a focal plane array
Buffered direct injection (BDI) common gate transconductance preamplifiers are typically used to couple infrared focal plane arrays to signal processing circuitry. This yields improved charge transfer efficiency over other methods of charge coupled device (CCD) readout. The use of CMOS technology in this stage is common due to the ease of implementing the design on VLSI integrated circuits. Crucial to the design of any detector preamplifier is its noise performance. The preamplifier's noise should be less than that of the detector in order to minimize system noise performance. CMOS integrated circuits however, are inherently noisy, especially at low frequencies where they are susceptible tq 1/f noise. This paper presents a computer aided design of an active-load, long-tail pair difference amplifier input stage to an operational amplifier. This design is based on a user specified noise performance for the system. The program produces the required physical dimensions of the transistors of the operational amplifier input stage. It also provides the electrical characteristics of the transistors for simulation purposes. The noise performance of the preamplifier is reviewed and the experimental results of a method of 1/f noise reduction using chopper-stabilization is presented.
This item is only available in print in the UCF Libraries. If this is your thesis or dissertation, you can help us make it available online for use by researchers around the world by downloading and filling out the Internet Distribution Consent Agreement. You may also contact the project coordinator Kerri Bottorff for more information.
Martin, Robert J.
Master of Science (M.S.)
College of Engineering
Electrical Engineering and Communication Sciences
Length of Campus-only Access
Masters Thesis (Open Access)
Dissertations, Academic -- Engineering; Engineering -- Dissertations, Academic
West, Mark E., "Low noise design of a buffered direct injection transconductance preamplifier for a focal plane array" (1989). Retrospective Theses and Dissertations. 4245.