Patent ID: 9306514
Filing Date: 2016-04-05
CPC Classification: H01L,H03F

Claim Text:
1. A hybrid radio frequency (RF) power amplifier comprising: a first device comprising an RF input terminal, an RF output terminal, a pre-driver stage configured to amplify an RF input signal received via the RF input terminal, and a control circuit, the RF input terminal, the RF output terminal, the pre-driver stage, and the control circuit disposed in or over a first substrate; a second device comprising a heterojunction bipolar transistor (HBT) amplifier circuit disposed in or over a second substrate, the HBT amplifier circuit configured to amplify an output of the pre-driver stage and provide an amplified RF signal, wherein the amplified RF signal is provided as an output of the RF power amplifier through the RF output stage; a control circuit configured to control operation of the HBT amplifier circuit responsive to a control signal, the control circuit disposed in or overthe first substrate; and a protection circuit configured to protect the HBT amplifier circuit from electrostatic discharge (ESD) and break down.