Oscillation circuit operating with stable oscillation frequency at a specific low power-supply voltage
US5250914A · kind A · utility
24Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1992 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Jun 24, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/03
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In an oscillation circuit, the Schmidt circuit generates the control signal of the first level when the charge-discharge voltage inputted from the capacitor shifts to a voltage higher than the first threshold voltage and generates the control signal of the second level when the charge-discharge voltage shifts to a level lower than the second threshold voltage. The switching circuit connects the second current source circuit with the capacitor when the control signal is of the first level and connects the first current source circuit with the capacitor when the control signal is of the second level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.