At the heart of the XO, VCXO, TCXO and OCXO product is quartz crystal (X).
Crystal Oscillator (XO)
Generally XOs are lower in cost than TCXOs as they do not have temperature compensation. They are simply quartz crystals combined with basic oscillation circuitry. XOs can offer high frequencies with low performance. They are typically used in telecommunication networks and other broadband applications.
A small cellular base station that plugs into an existing internet connection and provides strong mobile signal in the home. (See also Small cell definition).
In some industries reliability and high precision performance are critical.
Rakon’s high reliability solutions are found in space, defence and industrial applications which require the most stringent performance criteria.
Oven Controlled Crystal Oscillator (OCXO)
OCXOs are used in applications where precise reference clocks are needed to secure high volume data traffic. Stabilities can be as tight as less than 1 part per billion (ppb). OCXOs are generally more expensive, physically larger and consume a lot more power than a TCXO. Used in telecom infrastructure, space and defence applications.
Parts per billion (ppb)
A measure of accuracy. In Rakon’s OCXO products the timing accuracy is often measured in ppb. One ppb is,1/1,000 of a ppm which is 1000 times more accurate again or equal to 99.9999999% accuracy.
Parts per million (ppm)
A measure of accuracy. In Rakon’s TCXO, VCXO and XO products the timing accuracy is often measured in ppm. One ppm equals 1/1,000,000 which is equal to 99.9999% accuracy.
Personal Navigation Device (PND)
An in-car, dash mounted, GPS navigation device.
A small, lower cost, cellular base station typically installed on lamp posts which provides a limited area coverage compared to conventional (macro)base stations. Small cells are expected to reduce the need for macro stations.
Smart Wireless Device (SWD)
A portable device with added data functionality such as internet access, computing and video capability. Examples include smart phones (such as iPhones, Android phones etc) and tablet PCs (such as iPads).
Temperature Compensated Crystal Oscillator (TCXO)
A TCXO is essentially a quartz crystal combined with electronic circuitry to make it oscillate and it also removes much of the error in frequency caused by variations in temperature.
High Stability Temperature Compensated Crystal Oscillator
High Stability TCXOs are used in high volume, high performance markets such as mobile phone devices where small oscillator size is important. High Stability TCXOs have a typical performance of 0.5 parts per million (ppm) over wide temperature ranges. They are available in sizes as small as 2.0 x 1.6 mm.
Ultra Stable Temperature Compensated Crystal Oscillator
Many applications demand an even higher level of performance than our high stability TCXOs. Using unique technology, Rakon’s Ultra Stable TCXOs can achieve stabilities better than 100 parts per billion (ppb) over temperature. They are used in telecommunication networks and other high precision applications.
Telecommunications (Telecom) infrastructure
All the equipment which provides global communications networks, both wired and wireless.
Voltage Controlled Crystal Oscillator (VCXO)
A VCXO is an oscillator designed to have its oscillation frequency changed significantly by a controlled voltage. Customers using high performing OCXOs for base stations and telecom infrastructure also use many VCXOs at different frequencies as part of their timing network requirements. VCXOs can offer much higher frequencies as well as low noise performance. They are typically used in telecommunication networks.
The following are a list of whitepapers and articles prepared by Rakon in answer to various questions from customers. They are presented here for your reference, should you have any specific questions please contact us at any time.
Rakon has a wide range of high TCXO solutions, from highly stable products for mass volume consumer applications through to industry leading ultra-stable products for more demanding applications.
Rakon's commitment to quality and high performance has meant it has become the default standard for consumer GPS, emergency beacons, telecommunications infrastructure and many other performance critical applications.
A range of solutions are available with frequencies up to 700MHz with CMOS, PECL or LVDS outputs.
Rakon has expertise in high performance, low jitter, low phase noise XOs for demanding applications, including telecommunications and test and measurement.
Rakon also offer commercial products such as a 27 MHz VCXO in 5.0 x 3.2 and 7.0 x 5.0 mm packages for video applications.