Low-power feedforward amplifier

Details Low-power feedforward amplifier Low-power feedforward amplifier

1986-02-24

1987-06-30

Wan, Gene

Amplifiers

Hum or noise or distortion bucking introduced into signal...

330151, 330278, H03F 126, H03G 310

Patent

active

046773908

ABSTRACT:
A feedforward trunk amplifier having the distortion advantages associated with the feedforward topology while providing significantly reduced power consumption and cost. The trunk amplifier has a discrete preamplifier including active gain and slope control, and a low-power feedforward output stage including a medium-gain, hybrid main amplifier, a high-gain, discrete error amplifier having two gain stages which share the same bias current, and miniature coaxial cable delay lines mounted on the cover of the amplifier housing.

REFERENCES:
patent: 4447790 (1984-05-01), Fukuda et al.
Preschutti, J. P., "Limitations and Characteristics of Broadband Feedforward Amplifiers" CCTA Technical Papers 27th Annual CCTA Convention, Jun. 11-14, 1984, pp. 1-9.
Preschutti, J. P. "Applications of Feedforward Technology in Broadband Communications Systems" CCTA Tech. Papers 27th Annual CCTA Con. Jun. 11-14, 1984, pp. 1-8.
Blumenkranz, R. M. "A Microprocessor Monitored Feedforward Supertrack CATV Amplifier" IEEE Transaction on Cable Television, vol. CATV-5, No. 3, Jul. 1980, pp. 105-116.
Prochazka, A., "Design of a Wideband Feedforward Distribution Amplifier" IEEE Transaction on Consumer Electronics, Nov. 1976, pp. 349-350.
Evans, Charles "Feedforward," Communications/Engineering Digest, Apr. 1977.
Paulic, John "Some Considerations for Applying Several Feedforward Gain Block Models to CATV Distributions Amplifiers" NCTA Paper, 32nd Annual NCTA Convention, Jun. 12-15, 1983, pp. 1-6.
Texscan El Paso CATV Instruction Manual CATV100-9 Model 155 Hybrid IC Amplifier Module, Dec. 1983, pp. 1-24.

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