Autoliv Asp, Incorporated

Nxp B.v.

Yumin Lu

Robert Ian Gresham

Kathiravan Krishnamurthi

Ian Gresham

An amplifier circuit is disclosed comprising: an input terminal configured to receive a radio frequency input signal; an output terminal configured to provide a radio frequency output signal; a first transistor having a first collector, a first emitter, and a first base; a second transistor having a second collector, a second emitter, and a second base; a bypass switch; and a controller. The first base is connected to the input terminal and the second emitter. The first collector is connected to a circuit voltage supply and the output terminal. The first emitter is connected to ground and to the second base. The second collector is connected to a collector voltage supply. The bypass switch is connected between the first base and the output terminal. The controller is configured to operate the amplifier circuit in a normal mode of operation or a bypass mode of operation in accordance with an amplitude level of the radio frequency input signal, wherein the controller is configured to open the bypass switch in the normal mode of operation and close the bypass switch in the bypass mode of operation to selectively bypass the first transistor.

Amplifier circuit

A voltage controlled oscillator (VCO) is provided that includes an output buffer having a first buffer stage including a first transistor and a second buffer stage including a second transistor. The first and second transistors are connected in a cascaded emitter follower buffer arrangement.

Voltage controlled oscillator with cascaded emitter follower buffer stages

A frequency multiplier is provided that includes a switching component having a plurality of differential pairs of transistors. The frequency multiplier further includes a gain stage. A common mode feedback generated by the switching component is also provided to the gain stage.

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Chelmsford, MA, United States of America

Yumin Lu