Abstract

A gain enhanced common gate transresistance circuit is typically used as the coupling circuit between detector and multiplexer in a focal plane array. At an operating temperature of 77 degrees Kelvin, the dominant noises in the system are shot noise and 1/f noise. The 1/f noise corner frequency of the CMOS amplifiers used in focal plane arrays can .be as high as 10 kHz. In this paper it is shown that the 1/f noise corner frequency contributed to the system noise by the amplifier is a function of the bias voltage applied to the photodiode detector. Specifically, as the reverse bias to the detector increases, the 1/f noise corner contributed to the system by the amplifier decreases, while the 1/f noise corner contributed to the system by the photodiode increases. This implies there is a trade off between the amplifier contributed 1/f noise corner and the photodiode contributed 1/f noise corner. Therefore there is an optimum bias voltage, which is not zero volts, where the overall noise in the system will be at a minimum.

Graduation Date

1987

Semester

Fall

Advisor

Martin, Robert J.

Degree

Master of Science (M.S.)

College

College of Engineering

Format

PDF

Pages

84 p.

Language

English

Rights

Public Domain

Length of Campus-only Access

None

Access Status

Masters Thesis (Open Access)

Location

Orlando (Main) Campus

Identifier

DP0025745

Included in

Engineering Commons

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