Track-and-hold circuit utilizing a negative of the input signal for tracking
US5689201A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1995 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Aug 8, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C27/026
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A track-and-hold circuit that utilizes the negative of the input signal to improve tracking of the input signal during the track mode. By applying the negative of the input signal to an amplifier node to which the output signal is coupled, the output signal is forced to track the input signal in magnitude and polarity. Single-ended and fully differential embodiments of the circuit are disclosed, as well as embodiments using an operational amplifier and a cascode inverter amplifier. An improved switching scheme reduces delay in the transition from the hold mode to the track mode. A sample-and-hold circuit may be constructed from a pair of the track-and-hold circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.