Patent ID: 8265567
Filing Date: 2012-09-11
Classification: H03H,H04B

Abstract:
1. A radio frequency (RF) transceiver front end circuit with a predefined operating frequency for connecting a transceiver to an antenna, the front end circuit comprising: an antenna port connectible to the antenna; a common transmit and receive port; a power amplifier including a first power amplifier transistor having a base, a collector, and an emitter; a power amplifier input matching network coupling the common transmit and receive port to the power amplifier; a low noise amplifier including a first low noise amplifier transistor having a base, a collector, and an emitter; a low noise amplifier output matching network coupling the common transmit and receive port and the low noise amplifier; and a matching circuit including a power amplifier output matching segment coupled to the collector of the first power amplifier transistor and the antenna port, and a low noise amplifier input matching segment coupled to the base of the first low noise amplifier transistor and the antenna port, the power amplifier matching segment having shared components with the low noise amplifier segment.