Amplifier circuit
US7295072B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2005 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Jan 20, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45702
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier circuit includes a first differential amplifier circuit, a second differential amplifier circuit which amplifies an output signal from the first differential amplifier circuit, and an active feedback circuit which performs waveform shaping on the output signal from the first differential amplifier circuit by feeding back an output signal from the second differential amplifier circuit. The active feedback circuit includes first and second transistors having collectors or drains respectively connected to respective output nodes of the first differential amplifier circuit, bases or gates respectively connected to two output nodes of the second differential amplifier circuit, and emitters or sources connected in common, and a first current source which has a first end connected to the emitters or sources of the first and second transistors, and a second end connected to a low-voltage power supply, and producing a current that can be externally adjusted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.