Sample-and-hold apparatus and operating method thereof
US7541846B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2007 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Aug 28, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C27/026
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A sample-and-hold apparatus and an operating method thereof are provided. The sample-and-hold apparatus includes a sampling amplifier, a transistor, a first switch, a second switch, a sampling capacitor, and a drain-charge unit. A first input terminal of the sampling amplifier receives an input signal. A first-terminal of the transistor is coupled to a first voltage. The first switch is coupled between an output terminal of the sampling amplifier and a gate of the transistor. The first and second terminals of the second switch are coupled to a second terminal of the transistor and a second input terminal of the sampling amplifier, respectively. The first and second terminals of the sampling capacitor are coupled to the gate of the transistor and a reference voltage. The drain-charge unit for draining/providing charges has first and second terminals coupled to the second terminal of the second switch and a second voltage, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.