Amplifiers – Modulator-demodulator-type amplifier
Reexamination Certificate
2006-11-14
2006-11-14
Pascal, Robert (Department: 2817)
Amplifiers
Modulator-demodulator-type amplifier
C330S136000
Reexamination Certificate
active
07135918
ABSTRACT:
A power efficient system and method for linear signal power amplification are provided. A linear power amplifier provides signal amplification from a system input to a system output and is drain-modulated with a power supply signal. An active compensation circuit generates the power supply signal, which is substantially proportional to an envelope of the system input, and provides it to the power amplifier through a low-impedance output. The active compensation circuit reduces noise in the system output spectrum.
REFERENCES:
patent: 5831475 (1998-11-01), Myers et al.
patent: 6492867 (2002-12-01), Bar-David
Dolman Graham
Holder Philip
Ilowski John
Outaleb Noureddine
Nortel Networks Limited
Pascal Robert
Wong Alan
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