Multi-mode transceiver having tunable harmonic termination circuit and method therefor
US8160518B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2007 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Jan 18, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/0458
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transceiver includes a harmonic termination circuit that receives a tunable harmonic voltage from a power amplifier control. The harmonic termination circuit includes a variable capacitor that is capable of adjusting its capacitance in response to the tunable harmonic termination voltage to achieve at least two modes of operation. The at least two modes of operation may be EDGE mode and GSM mode. In this embodiment, the harmonic termination circuit allows for linearity specifications of EDGE to be met, while not degrading the efficiency of the transceiver when operating in GSM mode. In one embodiment, the harmonic termination circuit further includes an inductive element in series with the variable capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.