Since 1973, IQD has established a leading position in the European market as a specialist manufacturer and supplier of quartz based frequency control components. IQD´s own facilities are supplemented by a small number of quality managed partner factories with specific technology strengths.

IQD offers one of the most comprehensive frequency product ranges available, from low cost commercial grade product to that used in high reliability military and professional grade applications, including Quartz Crystals, Crystal Clock Oscillators, Industrial & Automotive Crystals (AEC-Q200 & TS16949 release with full PPAP), Fast Make Oscillators, VCXOs, TCXOs & VCTCXOs, OCXOs, GPS Disciplined OCXOs and Rubidium Oscillator.

IQD is certified to ISO 9001.


IQD Frequency Products Quartz Crystal
Quartz Crystal

IQD offers a comprehensive range of quartz crystal resonators covering both surface mount (SMD) and legacy thru-hole quartz crystal units that is suitable for most applications.

IQD Frequency Products Clock Oscillators
Clock Oscillators

IQD’s comprehensive range of crystal clock oscillators are available in a range of voltages down to 1.8V and in a variety of package sizes including both miniature surface mount (SMD) and thru-hole packages.

IQD Frequency Products VCXOs

Voltage Controlled Crystal Oscillators (VCXOs) are used for fine adjustment of the operating frequency and are normally used in conjunction with a phase locked loop.

IQD Frequency Products TCXOs and VCTCXOs

IQD's wide range of Temperature Compensated Crystal Oscillators (TCXOs) and Voltage Controlled TCXOs (VCTCXOs) offer tight frequency temperature stability performance down to the 'parts per billion' (ppb) level of many low end Oven Controlled Crystal Oscillators (OCXOs).

IQD Frequency Products OCXOs

IQD's range of Oven Controlled Crystal Oscillators (OCXOs) includes frequencies up to 100MHz with a wide choice of package sizes, supply voltages and outputs available.

IQD Frequency Products GPS Disciplined OCXOs
GPS Disciplined OCXOs

GPS Disciplined OCXOs (Oven Controlled Crystal Oscillators) are a range of advanced clock modules which provide electrical timing functionality for distributed network systems.

IQD Frequency Products Rubidium Oscillators
Rubidium Oscillators

Rubidium oscillators are a type of atomic clock and are the most accurate time standards known and are used as time distribution services to control things such as telecommunications infrastructure, TV broadcasts and global navigation satellite systems (GPS).