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AssigneepSemi Corporation
InventorsTero Tapio Ranta, Keith Bargroff, Christopher C. Murphy, Robert Mark Englekirk
Estimating the term…
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.
A compensation circuit configured to monitor a target circuit having one or more performance parameters affected by heating during operation of the target circuit, the compensation circuit including:
A time division duplexing radio system including (1) a power amplifier having a Gain that droops due to heating of the power amplifier during pulsed operation, and (2) a temperature compensation circuit, the temperature compensation circuit including:
An integrated circuit including (1) a WiFi power amplifier having a Gain that droops due to heating of the WiFi power amplifier during pulsed operation, and (2) a temperature compensation circuit, the temperature compensation circuit including:
Dependencies are inferred from the claim text.