Voltage sensitive supercharger for a sample and hold integrated circuit
US4142117A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1977 |
| Grant date | Feb 27, 1979 |
| Priority date | — |
| Expiry date | Apr 11, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C27/026
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An integrated circuit for rapidly charging a capacitive holding device to a voltage level within a predetermined range of acquired samples. One or more supercharging circuits can be provided to supplement the input signal in charging the signal holding device when the input signal by itself is not capable of providing enough current for rapid operation. The supercharging circuits compare the input signal with the held signal and provide supplemental charging current when the differential between these signals exceeds a predetermined threshold amount. Above this threshold the supplemental charging current varies progressively and preferably linearly with the signal differential, until a terminal point is reached above which the supercharging current remains constant. Provision is also made for inhibiting leakage of the held signal back into the charging circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.