Amplifiers – Signal feedback – Amplifier in signal feedback path
Patent
1989-02-09
1990-02-20
Mottola, Steven
Amplifiers
Signal feedback
Amplifier in signal feedback path
330308, 330110, H03F 134
Patent
active
049029827
ABSTRACT:
A nonlinear noninverting amplifier design for receiving and amplifying an input signal in an optical communication scheme having a nonlinear inverting feedback is disclosed. The inverting feedback varies nonlinearly with the input signal to avoid saturation of the amplifier while providing a zero state input amplitude signal to reduce the amplitude of the input signal required to turn-on the feedback, thus allowing the amplifier to operate with a wide variation of optical generators, paths, and converters. A nonlinear noninverting amplifier design is provided which eliminates the need for automatic gain control circuitry and can be designed as an integrated circuit.
REFERENCES:
patent: 4048573 (1977-09-01), Evans et al.
patent: 4291276 (1981-09-01), Ida
patent: 4540952 (1985-09-01), Williams
R. G. Smith, Receiver Design for Optical Fiber Communication Systems, Semiconductor Devices for Optical Communication, 1980, pp. 126-132.
Iwashita, et al., Monolithic Integrated Amplifiers for a Gigabit Optical Repeater, Electronics Letters, 24 May 1984, pp. 470-471.
Owen, et al., A Single-Chip NMOS Preamplifier for Optical Fiber Receivers, 1983 IEEE International Solid-State Circuits Conference, pp. 80-81.
Asad A. Abidi, Gigahertz Transresistance Amplifiers in Fine Line NMOS, IEEE Journal of Solid-State Circuits, vol. SC-19, No. 6, Dec. 1984, pp. 986-994.
Moore Charles E.
Zimmer Robert A.
Hewlett--Packard Company
Kelley Guy J.
Mottola Steven
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