Crystal oscillator that utilizes the power transistor of an output amplifier to heat the crystal resonator
US6707347B2 · kind B2 · utility
7Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2002 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Feb 2, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/32
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A crystal oscillator according to the present invention prevents abnormal oscillation at a temperature in a low-temperature area equal to or lower than an ordinary temperature. The crystal oscillator is configured such that a crystal vibrator is made to abut against a heat source, and the temperature of the crystal vibrator can be kept higher than a temperature where abnormal oscillation occurs. The temperature of the crystal vibrator is assumed to be, for example, higher than 0° C. Additionally, as the heat source, for example, a power transistor that amplifies an oscillation output is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.