Multiple bandwidth crystal controlled oscillator
US4896122A · kind A · utility
39Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1989 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Jul 14, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/0094
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A dual bandwidth crystal controlled oscillator is described having a first transconductance amplifier providing sufficient gain to maintain oscillation with an oscillator crystal at a minimum current drain. A second transconductance amplifier is provided which can be selectively coupled to the first transconductance amplifier, thereby augmenting the gain of the first transconductance amplifier to provide the capability for rapid oscillator start-up following battery saver operation. The dual bandwidth crystal controlled oscillator can be utilized in conventional oscillator and frequency synthesizer applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.