Transresistance amplifier
US7202744B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2005 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | Oct 7, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/303
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transresistance amplifier circuit includes an input terminal receiving an input current, an output terminal providing an output voltage indicative of the input current, a first bias current source providing a first bias current to the input terminal, a first transistor, a second transistor, and a biasing circuit. The first transistor is coupled between the output terminal and the input terminal and controlled by a first bias voltage. The second transistor is coupled between a first supply voltage and the output terminal and controlled by a second bias voltage. The biasing circuit generates the first bias voltage for the first transistor for imposing a first voltage at the input terminal. The first voltage is equivalent to a selected voltage of an application circuit and the biasing circuit generates the first bias voltage in a manner so as to allow the first voltage to track variations in the selected voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.