Amplifiers – With plural amplifier channels – Redundant amplifier circuits
Patent
1996-12-04
1999-02-02
Mottola, Steven
Amplifiers
With plural amplifier channels
Redundant amplifier circuits
330276, H03F 368, H03F 326
Patent
active
058670610
ABSTRACT:
A stacked power amplifier is provided in which an input signal is independently coupled to each of a series of amplifying devices in the stack. A transformer is used at the input circuit of each device to create an RF swing across each amplifying device which is substantially equal. This results in an equal distribution of RF and DC voltage among the devices in the stack.
REFERENCES:
patent: 4275360 (1981-06-01), Gill et al.
patent: 4816784 (1989-03-01), Rabjohn
patent: 5264803 (1993-11-01), Mayfield
Carlos Galup-Montoro, et al., "Series-Parallel Association of FET's for High Gain and High Frequency Application", Sep. 1994, IEEE Journal of Solid-State Circuits, vol. 29 No. 9, pp. 1094-1100.
M. Shifrin et al., "A New Power Amplifier Topology With Series Biasing and Power Combining of Transistors", May 1992, IEEE Microwave and Millimeter-Wave Monolithic Circuit Symposium, pp. 39-41.
E.M. Cherry and D.E. Hooper, "Amplifying Devices and Low-Pass Amplifier Design", pp. 883-884.
Derwent World Patent Search, 007013475 WPI Acc. No.: 87-013472/02, Abstract for Soviet Union Patent No. 1,231,575.
Derwent World Patent Search, 001439025 WPI Acc. No.: 76-A1908X/01, Abstract for Soviet Union Patent No. 468,350.
Leroux Robert
McRory John
Rabjohn Gordon G.
Suthers Mark S.
Mottola Steven
Northern Telecom Limited
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