Circuit and method of sensing process and temperature variation in an integrated circuit
US5359234A · kind A · utility
25Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 1993 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | Feb 1, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/135
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage controlled oscillator runs at full speed to generate an output frequency dependent on temperature and process variation. First and second clock signals are generated from the oscillator signal, while third and fourth clock signals are developed in response to an input clock signal. The number of clock signals occurring during a first state of the third clock signal are counted for providing a plurality of output signals also indicative of the temperature and process variation. The plurality of output signals compensate an input signal for the temperature and process variation for providing an output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.