Low voltage, switched capacitance circuit employing switched operational amplifiers with maximized voltage swing
US5745002A · kind A · utility
27Cited by
2References
48Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1994 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Oct 19, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H19/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A switched capacitance circuit, using a switched operational amplifier structure as an input switch of the switched capacitance, is provided with a new biasing circuit. An additional switched capacitor, switched alternately to power supply and to ground, is connected to the output side of the primary switched capacitor. Precision is retained while ensuring a rail-to-rail dynamic range, without requiring boosted control phases. Special arrangements may be implemented for controlling the amplitude of switching spikes when so required. A fully differential embodiment is also feasible with additional advantages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.