Integrated RF front end
US7088971B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2005 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Jun 22, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/61
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A monolithic integrated circuit (IC), and method of manufacturing same, that includes all RF front end or transceiver elements for a portable communication device, including a power amplifier (PA), a matching, coupling and filtering network, and an antenna switch to couple the conditioned PA signal to an antenna. An output signal sensor senses at least a voltage amplitude of the signal switched by the antenna switch, and signals a PA control circuit to limit PA output power in response to excessive values of sensed output. Preferred fabrication techniques include stacking multiple FETs to form switching devices. An iClass PA architecture is described that dissipatively terminates unwanted harmonics of the PA output signal. A preferred embodiment of the RF transceiver IC includes two distinct PA circuits, two distinct receive signal amplifier circuits, and a four-way antenna switch to selectably couple a single antenna connection to any one of the four circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.