HF amplifier with switchable gain

Details HF amplifier with switchable gain HF amplifier with switchable gain

2006-07-04

2006-07-04

Shingleton, Michael B (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S144000, C330S285000, C330S002000, C330S296000, C330S297000, C330S134000

Reexamination Certificate

active

07071782

ABSTRACT:
A device for amplifying or attenuating HF signals is characterized in that a transistor is connected in a common-emitter configuration in amplifying operation, and a base-collector diode is connected in the forward-biased direction for attenuating operation.

REFERENCES:
patent: 3098936 (1963-07-01), Isabeau
patent: 3883815 (1975-05-01), Grundy
patent: 4028629 (1977-06-01), Ringland
patent: 6211729 (2001-04-01), Morkner et al.
patent: 6253070 (2001-06-01), Andrews
patent: 100 34 864 (2001-04-01), None
Millman “Microelectronics Digital and Analog Circuits and Systems” McGraw-Hill Book Company 1979 pp. 68, 69 ,530.

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