Voltage controlled ring oscillator producing a sum output
US5428318A · kind A · utility
8Cited by
6References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 15, 1994 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Feb 15, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2201/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage controlled ring oscillator whose frequency does not depend on the number of stages in the ring oscillator. The inventive voltage controlled ring oscillator comprises N inverters connected in series with the output of the Nth inverter being coupled into the input of the first inverter. The output of each inverter is connected to a transconductance amplifier. The outputs of all transconductance amplifiers are summed. The oscillation period of the circuit is 2t.sub.d, (where t.sub.d is the delay of one inverter) which is independent of the number of inverters in the ring oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.