Current controlled oscillation device and method having wide frequency range
US7355486B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2006 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Jun 30, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0891
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A current controlled, phase locked loop device includes a phase detector configured to compare a reference frequency to an output frequency of a current controlled oscillator (ICO), a charge pump coupled to the phase detector and a low pass filter coupled to the charge pump. A voltage to current (V to I) converter is coupled to the low pass filter, providing an output current for integral control of the ICO. A control circuit is coupled to the ICO, and receives increment and decrement outputs of the phase detector, wherein the control circuit is configured to provide proportional control of the ICO through an amount of bias current applied thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.