Zcomm VCO : High Performance Voltage Controlled Oscillators
Introduction: Zcomm VCOs are renowned for their exceptional performance in RF and microwave applications. These voltage controlled oscillators provide precise frequency control, making them ideal for communication systems, radar and aerospace applications. Zcommâs innovative designs ensure reliability and efficiency, even in demanding environments. Discover their specifications and use cases.
Z-communication manufactures VCO which are used in PLL based frequency synthesizer designs. Z-comm VCOs are available for frequency range from 150MHz to 14 GHz. Zcomm vco has features such as low power consumption, ultra fine tuning precision, exceptional spectral purity etc.
Application Note : VCO in synthesizer design
The figure depicts position of VCO in RF synthesizer design. As shown VCO converts differential voltage into change in frequency oscillator output. This output frequency is again feed back to the input phase comparator module.

Hence VCO corrects the frequency drift due to temperature variation and aging. Hence it keeps the synthesizer output stable and locked to the reference frequency source. This reference frequency source is usually provided using OCXO crystal oscillator. Loop filter generates voltage based on the phase difference between reference frequency output and VCO output. Simple loop filter is RC low pass filter circuit and simple phase comparator circuit is EX-OR gate.
Z-comm VCO selection Guide
Following factors are considered in selecting z-comm vco
or any other manufacturer VCO
• Frequency range of operation
• DC tuning voltage range
• Output power
• Phase noise
• VCC,ICC
• Pushing (MHz/Volt)-Output fequency variation due to supply voltage change
• Pulling (MHz)- Frequency variation due to load impedance change
• Package type
• tuning speed
About Zcomm
Z-Communications Inc. is a world leader in VCO and PLL since decades. Among manufacturers, Z-comm is a largest VCO manufacturer for wireless as well as commercial market.
Other than VCO and PLL, Z-comm also produces RF components and microwave components.
With continuous investment in R & D, Z-comm develops quality components with excellent
performance.
➨ Visit Zcomm.com website to select VCOs and PLLs available in different frequency bands.
Conclusion
Zcomm VCOs deliver unparalleled performance for RF systems across industries. With a focus on innovation and precision, they ensure optimal signal quality and reliability. Whether for communication or aerospace, Zcomm VCOs are a trusted choice for professionals worldwide.
VCO related resources
Frequency pushing vs pulling
VCO tuning constant
VCO vs VCXO
NCO vs VCO
DDS basics
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RF synthesizer basics