Skyworks Solutions, Inc.

Aceinna Transducer Systems Co., Ltd.

Weize Xu

Guillaume Alexandre Blin

Douglas M Johnson

Jung Hee Lee

Attila Kalamar

Michael John Mitzen

Alexander Dribinsky

Leyue Jiang

Bin Liu

Examples provide methods and apparatus for controlling a DC bias current in an RF amplifier. In one example where the RF amplifier is implemented on an amplifier die, a reference voltage is produced across a reference resistor implemented on the amplifier die, the DC bias current is measured, and a current controller, which is implemented on a controller die that is separate from the amplifier die, operates a feedback loop using the reference voltage to control a level of the DC bias current.

Analog bias control of RF amplifiers

A linearity compensation circuit is disclosed for improving the linearity of a sensing signal. The linearity compensation circuit may include a compensator that is capable of receiving a sensing signal from a sensor and generating a compensation signal based on the sensing signal. The linearity compensation circuit may also include an output circuit that is capable of combining the compensation signal and the sensing signal to generate a compensated signal that exhibits an improved linearity. Also disclosed is a sensing apparatus which includes a sensor and the linearity compensation circuit. The sensing apparatus may thus be able to generate a sensing signal that is linear over a wider dynamic range.

Linearity compensation circuit and sensing apparatus using the same

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Acton, MA, United States of America

Weize Xu