Analog transconductance amplifier
US7528654B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2007 |
| Grant date | May 5, 2009 |
| Priority date | — |
| Expiry date | Aug 11, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/16
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An analog transconductance amplifier includes an input stage including a first transistor and a second transistor connected in series to the first transistor. The first and second transistors are connected between positive and negative voltages and are respectively controlled by an input voltage and a first control voltage for generating a normalized drive voltage. An amplification stage includes a first conduction path including an amplification transistor controlled by the normalized drive voltage. A first load transistor is connected in series to the amplification transistor and is controlled by a second control voltage. A second conduction path includes at least one second load transistor controlled by a third control voltage. A current mirror forces through the second conduction path a replica of current flowing through the first conduction path. An output stage transistor delivers an output current, and is controlled by a voltage on the second load transistor. All of the transistors in the analog transconductance amplifier are field effect transistors of a same conductivity type.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.