Transimpedance amplifier with a high gain/bandwidth product for conversion of a DAC output current
US7227420B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 2005 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Sep 6, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45528
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The two output currents (INP, IN) which are produced by a current source digital/analog converter (DAC) are supplied to the two halves of a symmetrical transimpedance amplifier. The input current (INP, IN) is supplied to a first stage, which is formed by a first transistor (N2), and a potential at the output of the first stage is supplied to a second stage, which is formed by a second transistor (N3), and the output voltage (VOUT, VOUTP) is formed by a potential at the output of the second stage. The output of the second stage is coupled to the output of the first stage through a Miller capacitor (Cm). The output of the transimpedance amplifier is coupled to its input by means of a connecting line which contains a feedback resistor (Rf).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.