Sample-and-hold device using complementary bipolar technology
US6275076A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2000 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Mar 15, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C27/026
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The proposed sample-and-hold device using a complementary bipolar technology comprises a follower input stage having an input receiving a voltage Vin to be sampled, at least one sampling circuit having a switching stage to be placed either in a first state called a "follower" state where its output follows the potential at its signal input or in a second state called an "isolated" state where its output is isolated from it signal input, the output of the switching stage being connected to the base of a first follower transistor whose emitter is connected to a terminal of an output sampling capacitor, the sampling circuit furthermore comprising a second transistor, having its emitter supplied by a current source and having its base connected to a potential copying that of the terminal of the output sampling capacitor, and a third transistor controlled by the digital command so as to be crossed by a current when the switching stage is in the <<isolated state>>, and so as to be off when the switching stage is in the <<follower>> state, the third transistor having its emitter connected to the base of the first transistor and its base connected to the emitter of the second transistor. A…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.