Operational transconductance amplifier with DC offset elimination and low mismatch
US7193466B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2004 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | May 11, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45574
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Provided is a transconductor capable of eliminating a direct current (DC) offset component of a signal and compensating a mismatch of the signal. The transconductor includes amplifiers of simple circuit structures, and a common mode control DC offset elimination circuit. The transconductor includes a common mode control DC offset elimination circuit unit receiving input/output voltages to stabilize the current supplying and the output DC value, a first amplifier and a second amplifier reducing a mismatch in a transconductor circuit and increasing an output resistance, in order to prevent a signal distortion or a wrong operation of the circuit that is caused by the mismatch signal and unstable DC voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.