Quadrature ring oscillator
US6744325B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2002 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Apr 15, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/0078
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A quadrature ring oscillator for high clock-rate applications is disclosed. A quadrature LC ring oscillator may use two stages of LC oscillators and variable mixers to provide consistent oscillation even at high clock rates. One stage of the quadrature ring oscillator comprises a first resonating element having an input and an output, and a first variable summer having L and P inputs and an output, with its L input being connected to the output of the first resonating element. The output of the first variable summer is connected to the input of the first resonating element The first variable summer may generate its output at a first phase by combining the L and P inputs. A second stage of the LC ring oscillator comprises a second resonating element, which has an input and an output, with its output being connected to the P input of the first variable summer. An inverter is used to produce an inverted signal of the output of the first resonating element. This stage also comprises a second variable summer having L and P inputs and an output, with its output connected to the input of the second resonating element. The P input of this second variable summer is connected to the inverted…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.