Compensation circuit for compensating for an input charge in a sample and hold circuit
US10115475B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2016 |
| Grant date | Oct 30, 2018 |
| Priority date | — |
| Expiry date | May 19, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A compensation circuit for compensating for an input charge at a first input of a sample and hold circuit, comprising: a first buffer, a first compensation capacitor comprising a first compensation terminal switchable between a first buffer input and a first buffer output, and a second compensation terminal switchable between the first buffer output and a reference terminal, and a control circuit to switch the first compensation terminal to the first buffer1 output and the second compensation terminal to the reference terminal during sampling, for storing a compensation charge into the first compensation capacitor, and to switch the first compensation terminal to the first buffer input and the second compensation terminal to the first buffer output during holding, for discharging the first compensation capacitor into the first input. The compensation charge is substantially equal to the input charge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.