VCO Oscillators

VCO (Voltage Controlled Oscillators) can also be known as silicon oscillators or VCOs. They are electronic devices designed to control oscillation frequency by varying the DC voltage input. Oscillation frequencies can be adjusted from a few Hz to hundreds of GHz. The VCO's can also work as modulators of both frequency and phase by delivering a modulating signal to the control input. Voltage Controlled Oscillators are also commonly used as an integral part of the phase-locked loop.


What are the types of VCO Oscillators?


Voltage Controlled Oscillators can be categorized into 2 types according to the type of waveform generated:


Linear / Harmonic Oscillator - this type of oscillator generates a sinusoidal type of waveform.


Relaxation Oscillator - This type of VCO is able to generate a triangular waveform or a sawtooth waveform.


What are the voltage controlled oscillators used for?


There are several typical applications of VCOs and they are:


  • Function Generators

  • Phase-Locked Loops

  • Tone Generators

  • Clock Generators

  • Electronic Jamming Equipment

  • Frequency Synthesizers

How to choose the right VCO?


  • Some key parameters that need to be considered before selecting the VCO are:

  • The Frequency Range - the minimum and maximum tunable oscillation frequency (MHz)

  • Output Power - The output power produced by the VCO (dbm)

  • Tuning Voltage - the voltage level applied to the device to tune and set the desired oscillation frequency (V)

  • Tunning Sensitivity - the level of variation of the oscillation frequency with different voltages applied to the VCO (MHz/V)

  • Supply Voltage - a DC Voltage required to correct operation (V)

  • Pulling - drift in the output frequency due to load variation (MHz/V)

  • Pushing - drift in the output frequency due to variation in the supply voltage (MHz/V)

  • Phase Noise - a clarity of the output signal from the VCO (dBc/Hz)

...
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Description Price Oscillator Type Output Frequency Frequency Stability Load Capacitance Pin Count Package Type Output Level Minimum Operating Temperature Maximum Operating Temperature Dimensions Height Maximum Operating Supply Voltage Minimum Operating Supply Voltage Series
RS Stock No. 145-1166
Mfr. Part No.SN74LS624N
kr 29,782
Each (In a Tube of 25)
Units
VCO 1.1 → 25MHz - - 14 PDIP-14 Squarewave 0°C 70°C 19.3 x 6.35 x 4.57mm 4.57mm 4.75V dc 5.25V dc -
RS Stock No. 905-5857
Mfr. Part No.CVCO55BE-0510-0770
BrandCrystek
kr 221,53
Each
Units
VCO 770MHz - - - - - -40°C 85°C 12.7 x 12.7 x 3.81mm 3.81mm 9.45V dc 8.55V dc CVCO55
RS Stock No. 423-462
Mfr. Part No.LTC6908CS6-1#TRMPBF
kr 39,90
Each
Units
VCO 50 → 10MHz 300ppm/√kh - 6 TSOT-23 CMOS 0°C 85°C 2.9 x 1.5 x 0.9mm 0.9mm 5.5V dc 2.8V dc -
RS Stock No. 672-1558
Mfr. Part No.FVXO-HC53BR-44.736
kr 53,17
Each
Units
VCO 44.736MHz ±50ppm 15pF - - HCMOS -40°C 85°C 5 x 3.2 x 1.4mm 1.4mm - - -
RS Stock No. 709-4702
Mfr. Part No.AD2S99APZ
kr 268,74
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 160-2659
Mfr. Part No.HMC509LP5E
kr 303,771
Each (On a Reel of 50)
Units
VCO 7.80 → 8.80GHz - - 32 QFN-32 - -40°C 85°C 5.1 x 5.1 x 1mm 1mm 13V dc 2V dc Hittite
RS Stock No. 862-6152
Mfr. Part No.HMC509LP5E
kr 362,34
Each
Units
VCO 7.80 → 8.80GHz - - 32 QFN-32 - -40°C 85°C 5.1 x 5.1 x 1mm 1mm 13V dc 2V dc Hittite
RS Stock No. 163-0465
Mfr. Part No.MC100EL1648DG
Brandonsemi
kr 91,604
Each (In a Tube of 98)
Units
VCO 1.1GHz - - 8 SOIC-8 ECL -40°C 85°C 5 x 4 x 1.5mm 1.5mm - - MC100EL
RS Stock No. 709-4706
Mfr. Part No.AD2S99BPZ
kr 220,46
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 160-2661
Mfr. Part No.HMC510LP5E
kr 207,479
Each (On a Reel of 50)
Units
VCO 8.45 → 9.55GHz - - 32 QFN-32 - -40°C 85°C 5.1 x 5.1 x 1mm 1mm 13V dc 2V dc Hittite
RS Stock No. 806-2567
Mfr. Part No.MC100EL1648DG
Brandonsemi
kr 106,43
Each
Units
VCO 1.1GHz - - 8 SOIC ECL -40°C 85°C 5 x 4 x 1.5mm 1.5mm - - -
RS Stock No. 190-4913
Mfr. Part No.MAX2608EUT+T
kr 11,74
Each (On a Reel of 2500)
Units
VCO 300 → 500MHz - - 6 SOT-23 - -40°C 85°C 3 x 1.75 x 1.3mm 1.3mm 5.5V dc 2.7V dc MAX260
RS Stock No. 672-1390
Mfr. Part No.FVXO-HC73BR-27
kr 53,13
Each
Units
VCO 27MHz ±50ppm 15pF - - HCMOS -40°C 85°C 7 x 5 x 1.4mm 1.4mm - - -
RS Stock No. 160-2662
Mfr. Part No.HMC511LP5E
kr 303,771
Each (On a Reel of 50)
Units
VCO 9.05 → 1.01GHz - - 32 QFN-32 - -40°C 85°C 5.1 x 5.1 x 1mm 1mm 13V dc 2V dc Hittite
RS Stock No. 672-1520
Mfr. Part No.FVXO-HC53BR-8.192
kr 39,36
Each
Units
VCO 8.192MHz ±50ppm 15pF - - HCMOS -40°C 85°C 5 x 3.2 x 1.4mm 1.4mm - - -
RS Stock No. 917-3438
Mfr. Part No.LTC6908CS6-1#TRMPBF
kr 28,488
Each (On a Reel of 500)
Units
VCO 50 → 10MHz 300ppm/√kh - 6 TSOT-23 CMOS 0°C 85°C 2.9 x 1.5 x 0.9mm 0.9mm 5.5V dc 2.7V dc -
RS Stock No. 862-6164
Mfr. Part No.HMC511LP5E
kr 362,34
Each
Units
VCO 6.65 → 7.65GHz - - 32 QFN-32 - -40°C 85°C 5.1 x 5.1 x 1mm 1mm 13V dc 2V dc Hittite
RS Stock No. 189-7193
Mfr. Part No.MAX2750EUA+
kr 63,28
Each (In a Tube of 50)
Units
VCO 2.40 → 2.50GHz - - 8 μMAX-8 - -40°C 85°C 3.1 x 3.1 x 0.95mm 0.95mm 5.5V dc 2.7V dc MAX260
RS Stock No. 131-1242
Mfr. Part No.HMC1163LP5E
kr 695,23
Each
Units
VCO 9.65 → 10.41GHz - - 32 LFCSP-32 - -40°C 85°C 5.1 x 5.1 x 0.95mm 0.95mm - - HMC1163
RS Stock No. 862-6161
Mfr. Part No.HMC510LP5E
kr 211,38
Each
Units
VCO 8.85 → 9.55GHz - - 32 QFN-32 - -40°C 85°C 5.1 x 5.1 x 1mm 1mm 13V dc 2V dc Hittite