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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Omschrijving Prijs Oscillator Type Output Frequency Frequency Stability Load Capacitance Package Type Output Level Minimum Operating Temperature Maximum Operating Temperature Dimensions Height Maximum Operating Supply Voltage Minimum Operating Supply Voltage Series
RS-stocknr. 442-870
FabrikantnummerSN74LS629N
5,23 €
Each
Aantal stuks
VCO 1.1 → 25MHz - 45pF PDIP Squarewave 0°C 70°C 19.3 x 6.35 x 4.57mm 4.57mm - - -
RS-stocknr. 923-2473
FabrikantnummerSN74LS629N
4,358 €
Each (In a Tube of 25)
Aantal stuks
- - - - SOIC - 0°C 70°C 19.3 x 6.35 x 4.57mm 4.57mm - - -
RS-stocknr. 162-7068
FabrikantnummerSN74LS628N
2,593 €
Each (In a Tube of 25)
Aantal stuks
- 1.1 → 25MHz - 45pF SOIC Squarewave 0°C 70°C 19.3 x 6.35 x 4.57mm 4.57mm - - -
RS-stocknr. 662-4573
FabrikantnummerSN74LS628N
3,252 €
Each (In a Pack of 5)
Aantal stuks
VCO 1.1 → 25MHz - 45pF PDIP Squarewave 0°C 70°C 19.3 x 6.35 x 4.57mm 4.57mm - - -
RS-stocknr. 905-5857
FabrikantnummerCVCO55BE-0510-0770
FabrikantCrystek
22,22 €
Each
Aantal stuks
VCO 770MHz - - SMD VCO -40°C 85°C 12.7 x 12.7 x 3.81mm 3.81mm 9.45V dc 8.55V dc -
RS-stocknr. 442-864
FabrikantnummerSN74LS624N
3,59 €
Each
Aantal stuks
VCO 1.1 → 25MHz - 45pF PDIP Squarewave 0°C 70°C 19.3 x 6.35 x 4.57mm 4.57mm - - -
RS-stocknr. 672-1558
FabrikantnummerFVXO-HC53BR-44.736
FabrikantFox Electronics
5,33 €
Each
Aantal stuks
VCO 44.736MHz ±50ppm 15pF - HCMOS -40°C 85°C 5 x 3.2 x 1.4mm 1.4mm - - -
RS-stocknr. 862-6152
FabrikantnummerHMC509LP5E
FabrikantAnalog Devices
32,36 €
Each
Aantal stuks
VCO - - - QFN - -40°C 85°C 5.1 x 5.1 x 1mm 1mm - - Hittite
RS-stocknr. 190-5970
FabrikantnummerMAX2608EUT+T
FabrikantMaxim Integrated
1,984 €
Each (In a Pack of 5)
Aantal stuks
VCO 300 → 500MHz - 0.5 SOT-23 - -40°C 85°C 3 x 1.75 x 1.3mm 1.3mm - - -
RS-stocknr. 862-6089
FabrikantnummerHMC385LP4E
FabrikantAnalog Devices
11,85 €
Each
Aantal stuks
VCO 2.25 → 2.5GHz - - QFN - -40°C 85°C 4.1 x 4.1 x 1mm 1mm - - Hittite
RS-stocknr. 806-2567
FabrikantnummerMC100EL1648DG
FabrikantON Semiconductor
8,77 €
Each
Aantal stuks
VCO 1.1GHz - 6pF SOIC ECL -40°C 85°C 5 x 4 x 1.5mm 1.5mm - - -
RS-stocknr. 862-6164
FabrikantnummerHMC511LP5E
FabrikantAnalog Devices
32,36 €
Each
Aantal stuks
VCO - - - QFN - -40°C 85°C 5.1 x 5.1 x 1mm 1mm - - Hittite
RS-stocknr. 917-3438
FabrikantnummerLTC6908CS6-1#TRMPBF
FabrikantAnalog Devices
2,309 €
Each (On a Reel of 500)
Aantal stuks
VCO 50 → 10MHz 300ppm/√kh 5pF TSOT-23 CMOS -40°C 85°C 2.9 x 1.5 x 0.9mm 0.9mm - - -
RS-stocknr. 160-2662
FabrikantnummerHMC511LP5E
FabrikantAnalog Devices
27,118 €
Each (On a Reel of 50)
Aantal stuks
VCO - - - QFN - -40°C 85°C 5.1 x 5.1 x 1mm 1mm - - Hittite
RS-stocknr. 190-4913
FabrikantnummerMAX2608EUT+T
FabrikantMaxim Integrated
0,927 €
Each (On a Reel of 2500)
Aantal stuks
VCO 300 → 500MHz - 0.5 SOT-23 - -40°C 85°C 3 x 1.75 x 1.3mm 1.3mm - - -
RS-stocknr. 862-6155
FabrikantnummerHMC507LP5E
FabrikantAnalog Devices
32,36 €
Each
Aantal stuks
VCO - - - QFN - -40°C 85°C 5.1 x 5.1 x 1mm 1mm - - Hittite
RS-stocknr. 145-1166
FabrikantnummerSN74LS624N
2,987 €
Each (In a Tube of 25)
Aantal stuks
VCO 1.1 → 25MHz - 45pF PDIP Squarewave 0°C 70°C 19.3 x 6.35 x 4.57mm 4.57mm - - -
RS-stocknr. 672-1520
FabrikantnummerFVXO-HC53BR-8.192
FabrikantFox Electronics
3,95 €
Each
Aantal stuks
VCO 8.192MHz ±50ppm 15pF - HCMOS -40°C 85°C 5 x 3.2 x 1.4mm 1.4mm - - -
RS-stocknr. 163-0465
FabrikantnummerMC100EL1648DG
FabrikantON Semiconductor
7,488 €
Each (In a Tube of 98)
Aantal stuks
VCO 1.1GHz - 6pF SOIC ECL -40°C 85°C 5 x 4 x 1.5mm 1.5mm - - -
RS-stocknr. 131-1242
FabrikantnummerHMC1163LP5E
FabrikantAnalog Devices
31,42 €
Each
Aantal stuks
VCO 9.65 → 10.41GHz - - LFCSP - -40°C 85°C 5.1 x 5.1 x 0.95mm 0.95mm - - HMC1163
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