Oscillator
US8451068B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2011 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Nov 23, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/0088
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Provided is an oscillator using an MEMS resonator, which can reduce an influence of noise of a TIA and improve phase noise characteristics of an oscillator output. The oscillator includes an MEMS resonator, a TIA, a buffer amplifier, and a current/voltage converter that couples, by electromagnetic induction, with a wiring line via which an output of the MEMS resonator is fed to the TIA, so as to convert a current flowing in the wiring line to a voltage and output the voltage to the buffer amplifier. Thus, the oscillator output is extracted from the current/voltage converter. Further, the current/voltage converter is provided in the form of an oscillation output coil provided so as to surround the wiring line in a noncontact manner, in which oscillation output coil one end is connected to ground and the other end is connected to the buffer amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.