Analog temperature controlled crystal oscillator
In physics, an Analog Temperature Controlled Crystal Oscillator or Analogue Temperature Compensated Crystal Oscillator (ATCXO) uses analog sampling techniques to correct the
temperaturedeficencies of a crystal oscillatorcircuit, its package and its environment.
Typically the correction techniques involve the physical and
electrical characterisationof the motional inductance and terminal capacitanceof a crystal blank, the knowledge of which is used to create a correction polynomial, or algorithm, which in turn is implemented in circuit blocks by Electronic Design Engineers. These circuitblocks are usually simulated in a mathematical modelling software tool such as SPICE, to verify that the original measured data can be corrected adequately. Once the system performance has been verified, these circuits are then implemented in a silicondie, usually in a bulk CMOS technology. Once fabricated, this die is then embedded into an oscillatormodule along with the crystal blank. Due to the sub 1ppm accuracy of this type of crystaloscillator specialist packaging must be used to ensure good ageing and temperature shock characteristics Example applications are for use in low power or battery operated consumer electronic products such as GSMor CDMAmobile phones, or GPSsatellite navigation systems.
* [http://www.mwrf.com/Articles/ArticleID/18910/18910.html Wireless Modules Score A Hit At Clay Pigeon Shoots ] at www.mwrf.com/ (minor mention)
* [http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel2/813/2439/00068834.pdf?temp=x Low profile high stability digital TCXO: ultra low powerconsumption TCXO] at ieeexplore.ieee.org (membership required)
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