Low power current feedback amplifier
US6724260B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2002 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Nov 27, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45174
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A low power current feedback amplifier having a lower output impedance input stage is provided. To reduce the output impedance, an input stage comprises a closed-loop input buffer. An exemplary input buffer comprises a closed-loop current feedback amplifier configured within the overall current feedback amplifier, wherein the output of the input buffer corresponds to the inverting node of the overall current feedback amplifier. The closed-loop configuration of the input buffer is facilitated by the use of an internal feedback resistor coupled from an inverting input terminal of the input buffer to the output of the input buffer, which corresponds to the inverting input terminal of the overall current feedback amplifier. The closed-loop input buffer realizes a low output impedance since the loop gain reduces the output impedance of the input buffer. With a lower output impedance, the bandwidth of the current feedback amplifier becomes more independent of the gain, even at low current implementations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.