Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1994-10-20
1996-01-09
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330259, 330305, 330306, 331 57, 331108B, H03F 345, H03B 502
Patent
active
054831954
ABSTRACT:
A low noise linear amplifier and a microwave voltage controlled oscillator constructed from such amplifier. Each amplifier within the VCO utilizes a ratioed transistor configuration to generate a linear output over a wide range of inputs. Output current from the amplifier is split into a main output current and components of in-phase and 180.degree. out-of-phase current. A logarithmic tuning control combines the components of in-phase and 180.degree. out-of-phase currents in inverse ratio to provide a constant d.c. feedback current.
REFERENCES:
patent: 5079515 (1992-01-01), Tanimoto
patent: 5093634 (1992-03-01), Khoury
patent: 5172076 (1992-12-01), Brown
patent: 5185581 (1993-02-01), Brown
"Phase Noise in Signal Sources", W. P. Robins, IEE Telecommunications Series 9, Peter Peregrinus Ltd., 1982, pp. 47-53.
"An 8GHz Silicon Bipolar Clock-Recovery and Data-Regenerator IC", Pottbacker et al, Digest of Technical Papers, 1994 IEEE International Solid-State Circuits Conference, p. 116.
MacGregor George
Mullins James B.
Northern Telecom Limited
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