Cascode CMOS RF power amplifier with programmable feedback cascode bias under multiple supply voltages
US7786807B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2009 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Apr 23, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/61
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Radio Frequency (RF) cascode power amplifier operates with differing battery supply voltages. A transconductance stage has a transistor with an RF signal input at its gate. A cascode stage has at least one cascode transistor, the cascode stage coupled in series with the transconductance stage between a battery voltage node and ground, the cascode stage having an RF signal output at the battery voltage node and at least one bias input to the at least one cascode transistor. Cascode bias feedback circuitry applies fixed bias voltage(s) to the at least one two bias inputs for a low battery voltage and applies feedback bias voltage(s) to the at least two bias inputs for a high battery voltage, the feedback bias voltage(s) based upon a voltage of the battery voltage node. More than two differing battery supply voltages are supported.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.