US 7,733,187 B2 · High frequency power amplifier

Abstract

A small, high performance high frequency power amplifier enables easily adjusting and switching the impedance. The high frequency power amplifier module includes a first semiconductor chip including one or a plurality of high frequency amplification devices, and a second semiconductor chip including one or more high frequency matching circuit devices and one or more switching devices. The second semiconductor chip includes the matching circuit for a high frequency amplifier device. The second semiconductor chip also includes a circuit composed of a capacitance and a switching device connected in series or parallel to the capacitance. The switching device switches on or off so that the capacitance is connected or is not connected as a part of the matching circuit.

Claims13

Dependent claims

A high frequency power amplifier comprising:

a first semiconductor chip including a main amplification stage having a first high frequency amplification device;
and
a second semiconductor chip including a main matching stage having a first switching device;
wherein the main amplification stage has a first output pin operable to output a first signal amplified by the first high frequency amplification device;
and
the main matching stage has a first input pin operable to receive the first signal, and
a first high frequency matching circuit device operable to match the first signal;
and
the first switching device is any one of a field effect transistor and a heterojunction field effect transistor.

6 more elements

Dependencies are inferred from the claim text.

High frequency power amplifier

Life of this patent

High frequency power amplifier

Life of this patent

Abstract

Claims13