Dynamic depressed collector

Details Dynamic depressed collector Dynamic depressed collector

2006-02-03

2008-05-06

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

C315S003500, C330S043000, C330S044000, C330S127000

Reexamination Certificate

active

07368874

ABSTRACT:
A biasing system for use with a multi-stage depressed collector of a high power amplifier includes one or more adjustable power sources. A power controller provides control signals to the power sources depending on the operational RF power level. For low power applications, biasing of collector electrodes is reduced such that savings in energy costs are realized, and operational temperature and wear are reduced. The control signals are based on values stored in a look-up table. For multiple depressed electrodes, biasing can be controlled in tandem or independently.

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International Search Report, International Application No. PCT/US2006/005667, date mailed Jun. 30, 2006.
J.X. Qiu et al., “Efficiency Enhancement of Traveling-Wave Tube Amplifier with Dynamically Adjusted Collector Bias Voltages”, IVEC, May 2007, 2 pgs.

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