Micropower RC oscillator having hysteresis produced by switching current sources to a transistor
US5570067A · kind A · utility
9Cited by
2References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Oct 29, 1996 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0322
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An RC oscillator operates at very low current levels and manifests very brief internal component delays. The RC oscillator does not employ a conventional comparator and a conventional hysteresis circuit for changing reference voltages on the comparator. Instead, the RC oscillator includes a plurality of amplifiers. Hysteresis is achieved by changing the threshold voltage of one of the amplifiers. The threshold voltage is changed by switching different current values through the transistor so that the current for activating the amplifier is different from the current for deactivating the amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.