Digital modulated RF power amplifier with impedance compensation circuit
US7978009B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2009 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Dec 25, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/2175
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital modulated power amplifier unit includes a differential radio frequency (RF) amplifier circuit having differential output nodes, a digital modulation signal input and complimentary clock signal inputs. The differential RF amplifier circuit includes a first pair of transistors operable to receive a digital modulation signal and a second pair of transistors operable to receive complimentary clock signals. The digital modulated power amplifier unit further includes an impedance compensation circuit connected between the differential output nodes of the differential RF amplifier circuit. The impedance compensation circuit includes a transistor connected in series between first and second RC circuits. The transistor is operable to electrically connect and disconnect the first RC circuit and the second RC circuit responsive to the digital modulation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.