Voltage-controlled oscillator, clock converter, and electronic device
US7012476B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 18, 2004 |
| Grant date | Mar 14, 2006 |
| Priority date | — |
| Expiry date | Mar 18, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0091
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage-controlled oscillator includes a voltage-controlled phase-shift circuit, outputting a signal with the shift deviated from an input signal by a specified amount with an external control voltage Vt, a SAW resonator, a buffer, inputting a resonance signal having a specified resonance frequency from the SAW resonator, outputting a clock signal with a desired frequency, and outputting a positive-feedback-oscillation-loop output signal, wherein the voltage-controlled phase-shift circuit, the SAW resonator, and the buffer construct a positive-feedback oscillation loop, in which the frequency temperature characteristic of the SAW resonator is rotated by a specified amount using the temperature characteristic of the propagation delay time of the buffer to correct the frequency temperature characteristic of the SAW resonator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.