Variable delay circuit having a ramp voltage generating unit
US6466076B2 · kind B2 · utility
37Cited by
6References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 14, 2001 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | May 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2005/00026
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A variable delay circuit includes a ramp voltage generating unit having a storage capacitor, a charging transistor for charging the capacitor and a constant-current source for discharging the capacitor, and a comparator for comparing the output of the ramp voltage generating circuit against a voltage setting to output a delayed signal. The electric charge flowing out from the output node of the ramp voltage generating unit through the charging transistor during generating the ramp voltage is compensated by a compensating capacitor to output a linear ramp voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.