Power Amplifier Self-Heating Compensation Circuit

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United States of America Patent

APP PUB NO 20190173433A1
SERIAL NO

16253115

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Temperature compensation circuits and methods for adjusting one or more circuit parameters of a power amplifier (PA) to maintain approximately constant Gain versus time during pulsed operation sufficient to substantially offset self-heating of the PA. Some embodiments compensate for PA Gain “droop” due to self-heating using a Sample and Hold (S&H) circuit. The S&H circuit samples and holds an initial temperature of the PA at commencement of a pulse. Thereafter, the S&H circuit generates a continuous measurement that corresponds to the temperature of the PA during the remainder of the pulse. A Gain Control signal is generated that is a function of the difference between the initial temperature and the operating temperature of the PA as the PA self-heats for the duration of the pulse. The Gain Control signal is applied to one or more adjustable or tunable circuits within a PA to offset the Gain droop of the PA.

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Patent Owner(s)

Patent OwnerAddress
PSEMI CORPNot Provided

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bargroff, Keith San Diego, US 33 233
Englekirk, Robert Mark Littleton, US 53 478
Murphy, Christopher C Lake Zurich, US 11 15
Ranta, Tero Tapio San Diego, US 48 409

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