CMOS oscillator having stable frequency with process, temperature, and voltage variation
US9325323B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2014 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | Aug 30, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/18
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A clock signal generation circuit configured to generate the clock signal having a frequency that is maintained across variations in a number of operating conditions, such as changes in supply voltage, temperature and processing time. In an embodiment, the frequency spread of the generated clock signal of a PVT-compensated CMOS ring oscillator is configured to compensate for variations in the supply voltage, as well as for variations in process and temperature via a process and temperature compensation circuit. The PVT-compensated CMOS ring oscillator includes a regulated voltage supply circuit to generate a supply voltage that is resistant to variations due to changes in the overall supply voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.