Skyworks Solutions, Inc.

Conexant Systems, Inc.

Mark Bloom

Hugh J Finlay

David Steven Ripley

Paul Raymond Andrys

Kevin Choi

Terry J Shie

Kevin M Hoheisel

Thomas L Fowler

Naishuo Cheng

A constant current bias approach that receives an input bias voltage and maintains a temperature independent constant current bias in a linear amplifier device. Integrated sense circuitry protects against unacceptable input voltages to guarantee bias stability. Fabrication in multiple semiconductor technologies and assembly into a single package allows for optimum cost and performance of DC bias and RF amplifier sections.

Constant current biasing circuit for linear power amplifiers

The bias control selectively provides for bias of a power amplifier based upon a bandgap voltage generated by the bias control, or by a bias voltage external to the bias control. A controller controls the selection of either the bandgap voltage or external bias voltage. The bias control is fabricated in a first semiconductor material capable of operating at low voltage supply levels, such as complementary metal oxide semiconductor (CMOS) material and may be fabricated on an integrated circuit common with a power amplifier.

Configurable power amplifier and bias control

A high efficiency, multiple power output power amplifier uses a pair of amplifiers having similar characteristics coupled to a pair of radio frequency RF couplers. When both amplifiers are operating, the power output is the sum of the outputs of the two amplifiers. When lower power operation is desired, one of the amplifiers is turned off and a high impedance is presented to the isolated port of the output RF coupler, thereby ensuring that all of the power output of the remaining power amplifier is available for output.

Multi-level power amplifier

High efficiency multiple power level amplifier

Growing community of inventors

Chandler, AZ, United States of America

Mark Bloom