Capacitive load drive circuit
US5006739A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1990 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Aug 15, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0291
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In parallel to a first current source for discharging (or charging) a capacitive load in a complementary way with respect to a voltage output circuit, a second current source for compensating a voltage change caused by leak resistance is provided. Since the voltage change of the capacitive load caused by the leak resistance is not so large, the amount of a current let flow by the second current source provided for compensating the voltage change of the capacitive load caused by the leak resistance may be made smaller than the amount of a current let flow by the first current source. By providing the second current source, therefore, it becomes possible to compensate the voltage change of the capacitive load caused by leak resistance while limiting an increase in dissipated power to a very small value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.