VCXO

VCXOs

Voltage Controlled Crystal Oscillators

VCXOs

Voltage Controlled Crystal Oscillators

VCXOs or Voltage Controlled Crystal Oscillators allow for fine-tuning of the output frequency by varying the control voltage and are normally used in conjunction with a phase locked loop (PLL). Frequency adjustments are possible down to the parts per million (ppm) level. VCXOs offer design engineers the ability to generate more stable output frequencies whilst ensuring the application signal remains intact.

IQD’s VCXO models are available with a wide range of different ‘pulling' (sometimes referred to as 'VCXO tuning range') and outputs options available such as CMOS, HCMOS, Sinewave, LVDS, LVPECL and differential Sinewave. We also offer VCXOs in tight stabilities and superior phase noise and jitter categories, and customisable designs can be considered for specific applications.

VCXOs are extensively used in telecommunications and find applications in various testing and broadcast equipment.

IQD VCXO Category thumbnail

Key Features of VCXOs

  • Frequency: achievable up to 2.2GHz
  • Low jitter: down to 0.3ps
  • Pulling from ±25ppm up till ±150pp

VCXO Pulling

VCXO Pulling can be specified in one of two ways:

  • Minimum Pulling: This defines the frequency change which will be seen when varying the control voltage input. The range is with reference to the nominal frequency, i.e. the frequency at the midpoint of the pulling range.
  • Absolute Pulling Range (APR): This definition takes into account the frequency tolerance and stability and gives the remaining pulling. This specifies the pulling from the nominal frequency which is guaranteed to be met across the full operating temperature range. For example, if a VCXO will change by ±50 ppm over temperature and has a pulling range of >±200 ppm, therefore the minimum pulling is ±200 ppm, however, the APR would be ±150 ppm.

Read more about Specifying VCXO and Pulling here

Additional Available Features

Telecommunication, test and broadcast equipment, wireless infrastructures, digital audio and video processing, phase-locked loops [PLL], and industrial process controls, optical networking: SONET/SDH.

Featured Products and Applications

IQXV-114 â€“ Package Size: 7050, In Timestamp for CCTV and Hi-temperature and Radiation-tolerant camera systems

 

Learn more about other frequency products from IQD...

Contact Us

Contact Us

For more information about any of our parts or for help with your design-in, you can contact our Sales Team, Application Support or Engineering on +44 (0) 1460 270200, or click Contact Us below to submit your enquiry. 

IQD Customer Service Call Centre

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