Structure of operational amplifier
US6351187B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2000 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Jun 15, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/7227
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An operational amplifier including a differential amplifier circuit, and a reverse output buffer. The reverse output buffer has a first forward switch, a second forward switch, a first reverse switch, and a second reverse switch. The first forward switch and the first reverse switch and the second forward switch are connected in series between a reference voltage source and a grounding terminal. The second forward switch being connected between the output terminal of the operational amplifier and the grounding terminal. The second reverse switch and the second forward switch are electrically connected by a bias voltage provided from a bias voltage input terminal connected thereto, so that when the second bias voltage input terminal is at low potential and the first bias voltage is at high potential, the second reverse switch is on, and the second forward switch is off. The operational amplifier will then function normally. When the second bias voltage input terminal is at high potential and the first bias voltage input terminal is at low potential, the second reverse switch is off, and the second forward switch is on. This causes the operational amplifier to consume no electricity,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.