Voltage controlled oscillator including a plurality of differential amplifiers
US6252467A · kind A · utility
12Cited by
2References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1999 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Jul 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0322
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A differential VCO includes a ring oscillator with a plurality of differential buffers connected in a ring, a bias circuit including a replica circuit of the differential buffers, and a differential gain increasing circuit for increasing differential gain of the differential buffers. Even when the differential gain of the differential buffer lowers as a result of obtaining a clock signal of higher frequency, the ring oscillator oscillates smooth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.