Triangular wave generation circuit
US7403049B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2006 |
| Grant date | Jul 22, 2008 |
| Priority date | — |
| Expiry date | Jan 19, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K4/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A first constant-current source supplies a charging current to a second terminal of a first capacitor in which a first terminal is grounded. A first terminal of a second capacitor is grounded, and a first switch is provided between the second terminal of the first capacitor and a second terminal of the second capacitor. A second constant-current source supplies current to the second capacitor, and a second switch is provided on a current path of the second constant-current source. A third constant-current source draws out current from the first capacitor and the second capacitor. A switch controller turns on the first switch and turns off the second switch when an output voltage appearing in the second terminal of the first capacitor reaches a predetermined upper-limit voltage. The switch controller turns off the first switch and turns on the second switch when the output voltage drops to a predetermined lower-limit voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.