Crystal oscillator
US4142161A · kind A · utility
3Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1978 |
| Grant date | Feb 27, 1979 |
| Priority date | — |
| Expiry date | Feb 16, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/323
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A crystal-controlled oscillator of integrated circuit design, comprising, a three-stage direct-coupled amplifier employing insulated gate field-effect-transistors and overall resistive negative (DC) feedback for bias stabilization thereof. The oscillator is designed to operate at a frequency at which the reactive network, including the inherent interelectrode capacitances of the field-effect-transistors, of the amplifier results in a loop phase shift which satisfies the Barkhausen Criterion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.