Non-Linear Capacitance Compensation
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsAnil Samavedam, David E. Bockelman, Vishnu Srinivasan, Eric Kimball
Life of this patent
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Abstract
Embodiments are directed to capacitance compensation via a compensation device coupled to a gain device to compensate for a capacitance change occurring due to an input signal change, along with a controller coupled to the compensation device to receive the input signal and to control an amount of compensation based on the input signal. In some embodiments, banks may be formed of multiple compensation devices, where each of the banks has a different size and is coupled to receive a different set of bias voltages.
Claims18
An apparatus comprising:
- a gain device to receive an input signal and to output an amplified signal;
- and
- a compensation device coupled to the gain device to compensate for a change in a capacitance of the gain device occurring due to a change in the input signal;
- and
- a controller coupled to the compensation device to receive the input signal and to control an amount of capacitance compensation provided by the compensation device based on the input signal.
A power amplifier comprising:
- a gain stage having first and second complementary amplifiers, the gain stage to receive a differential input signal and to output a differential amplified signal;
- a transformer having a first side and a second side, the second side to provide the differential input signal to the gain stage;
- and
- first and second compensation devices coupled to the first side, wherein each of the first and second compensation devices is to compensate for a change in capacitance of at least a portion of the first and second complementary amplifiers responsive to a signal swing of the differential input signal.
Dependencies are inferred from the claim text.