Crystal oscillator circuit with feedback control
US4544897A · kind A · utility
7Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1983 |
| Grant date | Oct 1, 1985 |
| Priority date | — |
| Expiry date | Nov 29, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D7/165
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An oscillating circuit includes first and second stage amplifiers, a feedback circuit formed of a capacitor and a resistor and connected between the output terminal of the second stage amplifier and the input terminal of the first stage amplifier and a crystal resonator having a predetermined resonance frequency and being connected to the first stage amplifier, the total gain of the oscillating circuit being selected so that the oscillating circuit initiates its oscillation only when the crystal resonator is connected to the first stage amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.