Voltage controlled ring oscillator frequency multiplier
US5764111A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 1997 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Feb 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/10
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage controlled ring oscillator (10) integrated with a phase locked loop (101) using CMOS technology. The ring oscillator (10) provides a frequency multiplied harmonic output frequency (42) at a frequency of 2.5 GHz or more while operating at only one-third of that frequency. The ring oscillator (10) uses an odd number of inverter stages (12, 14, 16) and provides high frequency CMOS operation by utilizing the phase shifted signals of the ring frequency at each ring inverter output (20, 24, 28). The ring oscillator (10) draws minimal current and is incorporated in a frequency synthesizer (100) used in a radio communication device (200).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.