Oscillator circuit having a stable output signal resistant to power supply voltage fluctuation
US7663447B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 2007 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Oct 19, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D86/0214
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A stable frequency is outputted by an oscillator circuit including a constant current circuit which is electrically connected between a first terminal and a second terminal, a voltage controlled oscillator circuit in which an oscillation frequency fluctuates in accordance with a potential difference between power supply voltage terminals, an n-channel transistor, a p-channel transistor in which a gate-source voltage is set to be constant by the constant current circuit, and a capacitor, in which a source electrode of the p-channel transistor is electrically connected to the first terminal, a drain electrode of the p-channel transistor is electrically connected a drain electrode and a gate electrode of the n-channel transistor, a source electrode of the n-channel transistor is electrically connected to the second terminal, and a gate electrode of the n-channel transistor is electrically connected to the second terminal through the capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.