Multi-level/multi-threshold/multi-persistency gps/gnss atomic clock monitoring
US-2016245921-A1 · Aug 25, 2016 · US
Common reference crystal systems
US9130576B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9130576-B2 |
| Application number | US-201414170872-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 3, 2014 |
| Priority date | Jun 4, 2012 |
| Publication date | Sep 8, 2015 |
| Grant date | Sep 8, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
One embodiment of communication system comprises a crystal oscillator configured to output a reference clock; cellular radio frequency (RF) and baseband phase locked loops configured to receive the reference clock within a cellular module and compensate for calculated frequency errors between a received cellular downlink signal and a cellular local oscillator signal during operation of the cellular module; global positioning system (GPS) frequency compensation circuitry configured to receive the reference clock within a GPS module and compensate for calculated frequency errors during operation of the GPS module; and a temperature sensing circuit which includes a plurality of sensing resistors and is configured to output a signal corresponding to a temperature of a reference crystal which is translated to a frequency deviation, wherein the (GPS) frequency compensation circuitry is configured to offset the frequency deviation and output a temperate compensated signal to meet GPS clock frequency requirements.
First claim
Opening claim text (preview).
The invention claimed is: 1. A system comprising: a crystal oscillator configured to support a cellular receiver and a global positioning system (GPS) receiver; an uncompensated crystal resonator coupled to the crystal oscillator, the uncompensated crystal resonator configured to generate a reference signal; a temperature sensing circuit configured to output a signal substantially proportional to a current temperature; and a compensation module integrated with the GPS receiv…
Assignees
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Classifications
- G01S19/235Primary
Physics · mapped topic
- H03L1/022Primary
Electricity · mapped topic
Physics · mapped topic
- H03B5/32Primary
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9130576B2 cover?
- One embodiment of communication system comprises a crystal oscillator configured to output a reference clock; cellular radio frequency (RF) and baseband phase locked loops configured to receive the reference clock within a cellular module and compensate for calculated frequency errors between a received cellular downlink signal and a cellular local oscillator signal during operation of the cell…
- Who is the assignee on this patent?
- Broadcom Corp
- What technology area does this patent fall under?
- Primary CPC classification G01S19/235. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Sep 08 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).