Anadigics, Inc.

Skyworks Solutions, Inc.

Michael Wayne Trippe

Rui Filipe Antunes Ribafeita

Brittin C Kane

Carl S Chun

Daryl W Barry

Sangwoo Han

Jonathan Paul Griffith

Thomas B Smith

An electronic current mirror circuit particularly suitable for use in radio frequency (RF) and microwave power amplifiers. The electronic circuit includes a first current mirror circuit and a second current mirror circuit. The first current mirror circuit includes a first input circuit path and a first output circuit path, the first input circuit path is operated at a first supply voltage and the first output circuit path is operated at a second supply voltage. The second current mirror circuit includes a second input circuit path and a second output circuit path, the second input circuit path is operated at the second supply voltage, and the second output circuit path is connected to the first input circuit path so that variations in a current through the first output circuit path are compensated by a current in the second output circuit path.

Circuit arrangement for compensating current variations in current mirror circuit

An improved current mirror circuit. The current mirror circuit includes a current mirror base network, a current source transistor, and an error transistor. The current mirror base network includes a first terminal, a second terminal, and a third terminal. The first terminal is connected to the current source transistor through a first impedance element. The second terminal is connected to the error transistor. The third terminal is connected to a first bias voltage source, and the first terminal is connected to a second bias voltage source.

Current mirror circuit

The present innovation is directed to a single-chip integrated circuit power amplifier configured to employ the efficiency enhancement techniques utilized in Doherty amplifiers. The single-chip integrated circuit power amplifier may be implemented using uniquely designed biasing circuits as described herein. Also, the use of combined HBT/FET processes and a lumped quarter-wavelength transformer may be inherently well suited for the implementation of Doherty amplifiers in the single-chip techniques described herein.

Efficiency enhancement for MMIC amplifiers

A transistor bias circuit is provided that is capable of biasing an amplifier transistor having a control terminal, a current-sink terminal, and a current-source terminal in order to control inter-modulation and linearize the output corresponding to radio frequency and microwave frequency ranges. Additionally, an embodiment of the present circuit is capable of dynamic power control. The transistor bias circuit according to the present invention utilizes a leakage current to alter the electrical characteristics of the amplifier transistor. The bias circuit comprises a bias transistor having a control terminal, a current-sink terminal, and a current-source terminal. Additionally, at least one DC input port, at least one resonator element, a diode element, and a resistive element is provided.

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Norcross, GA, United States of America

Michael Wayne Trippe