Chopper-stabilized current feedback amplifier
US10979006B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2019 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Sep 6, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45634
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A chopper-stabilized current feedback amplifier includes an input buffer having a non-inverting input and an inverting input. A first group of chopper circuits modulate current at the non-inverting and inverting inputs. The current feedback amplifier further includes a plurality of current mirrors coupled to the input buffer. A second group of chopper circuits modulate current in the current mirrors. The current feedback amplifier also includes phase detector circuitry coupled to the current mirrors and configured to detect a transition current in the current mirrors. The current feedback amplifier also includes a switched capacitor filter having an input coupled to the current mirrors. The switched capacitor filter is turned OFF responsive to the detection of the transition current by the phase detector circuitry. The current feedback amplifier also includes an output stage having an input coupled to the switched capacitor filter and is configured to produce an output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.