Monolithic clock generator and timing/frequency reference
US9240792B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2014 |
| Grant date | Jan 19, 2016 |
| Priority date | — |
| Expiry date | Jan 27, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0812
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A periodic signal generator includes a resonant LC tank circuit that generates a periodic reference signal at a first frequency at a differential output thereof. A temperature-responsive frequency compensation module is electrically coupled to the differential output of the resonant LC tank circuit. This module includes a temperature dependent voltage control module that generates a temperature dependent control voltage and an array of switchable capacitive modules that is electrically coupled to a first node of the differential output of the resonant LC tank circuit and responsive to the temperature dependent control voltage and a plurality of switching coefficients. The array of switchable capacitive modules includes a fixed capacitor having a first terminal electrically coupled to the first node and a voltage-controlled variable capacitor having a first terminal electrically coupled to the first node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.