Track and hold circuit
US5315170A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1992 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Jun 23, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C27/026
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A track and hold circuit for producing an output voltage having a level related to the voltage level of an input voltage fed to the circuit during a track mode and for maintaining the level of the output voltage constant during a hold mode. The circuit includes a current source and a capacitor with the capacitor being charged with the current or discharged selectively in accordance with the level of the input voltage relative to the level of the output voltage to produce at the capacitor the voltage related to the voltage level of the input voltage. Current from the current source is directed away from the capacitor during the hold mode in order to reduce the effect of charge stored during the track mode from slowing the transition from track mode to hold mode operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.