Frequency reference signal generating system and method for frequency synthesizers
US8686800B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2012 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Nov 13, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B28/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system for generating a frequency reference signal comprising an oscillator, a direct digital synthesizer coupled to the oscillator and configured to receive a signal output from the oscillator, a digital to analog converter coupled to the direct digital synthesizer and configured to receive a sampled signal from the direct digital synthesizer and to convert the sampled signal to an analog waveform, and a bandpass filter coupled to the digital to analog converter and configured to select an aliased output signal from the digital to analog converter at a Nyquist zone other than a first Nyquist zone and to output the frequency reference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.