Patent ID: 9419567
Filing Date: 2016-08-16
CPC Classification: H01L,H03F,H04B

Claim Text:
1. A system for biasing a power amplifier, the system comprising: a first die including a power amplifier circuit, a semiconductor resistor, and an isolation feature, the power amplifier circuit including a transistor formed on a semiconductor, the semiconductor resistor formed from one or more layers as a layer stack device on the semiconductor that includes the transistor, the isolation feature configured to isolate the semiconductor resistor from the transistor, the semiconductor resistor configured to sense a beta parameter of the power amplifier circuit, the beta parameter dependent on characteristics of the first die; and a second die including a bias signal generating circuit that is configured to generate a bias signal based at least in part on a measurement of the beta parameter sensed by the semiconductor resistor of the first die.