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 Prix 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
N° de stock RS 662-4573
Référence fabricantSN74LS628N
3,252 €
Each (In a Pack of 5)
Unité
VCO 1.1 → 25MHz - 45pF PDIP Squarewave 0°C 70°C 19.3 x 6.35 x 4.57mm 4.57mm - - -
N° de stock RS 923-2473
Référence fabricantSN74LS629N
4,358 €
Each (In a Tube of 25)
Unité
- - - - SOIC - 0°C 70°C 19.3 x 6.35 x 4.57mm 4.57mm - - -
N° de stock RS 442-870
Référence fabricantSN74LS629N
5,23 €
Each
Unité
VCO 1.1 → 25MHz - 45pF PDIP Squarewave 0°C 70°C 19.3 x 6.35 x 4.57mm 4.57mm - - -
N° de stock RS 162-7068
Référence fabricantSN74LS628N
2,593 €
Each (In a Tube of 25)
Unité
- 1.1 → 25MHz - 45pF SOIC Squarewave 0°C 70°C 19.3 x 6.35 x 4.57mm 4.57mm - - -
N° de stock RS 905-5857
Référence fabricantCVCO55BE-0510-0770
MarqueCrystek
22,22 €
Each
Unité
VCO 770MHz - - SMD VCO -40°C 85°C 12.7 x 12.7 x 3.81mm 3.81mm 9.45V dc 8.55V dc -
N° de stock RS 862-6161
Référence fabricantHMC510LP5E
24,90 €
Each
Unité
VCO - - - QFN - -40°C 85°C 5.1 x 5.1 x 1mm 1mm - - Hittite
N° de stock RS 672-1558
Référence fabricantFVXO-HC53BR-44.736
5,33 €
Each
Unité
VCO 44.736MHz ±50ppm 15pF - HCMOS -40°C 85°C 5 x 3.2 x 1.4mm 1.4mm - - -
N° de stock RS 423-462
Référence fabricantLTC6908CS6-1#TRMPBF
3,58 €
Each
Unité
VCO 50 → 10MHz 300ppm/√kh 5pF TSOT-23 CMOS -40°C 85°C 2.9 x 1.5 x 0.9mm 0.9mm - - -
N° de stock RS 160-2662
Référence fabricantHMC511LP5E
27,726 €
Each (On a Reel of 50)
Unité
VCO - - - QFN - -40°C 85°C 5.1 x 5.1 x 1mm 1mm - - Hittite
N° de stock RS 917-3438
Référence fabricantLTC6908CS6-1#TRMPBF
2,309 €
Each (On a Reel of 500)
Unité
VCO 50 → 10MHz 300ppm/√kh 5pF TSOT-23 CMOS -40°C 85°C 2.9 x 1.5 x 0.9mm 0.9mm - - -
N° de stock RS 160-2659
Référence fabricantHMC509LP5E
27,726 €
Each (On a Reel of 50)
Unité
- - - - QFN - -40°C 85°C 5.1 x 5.1 x 1mm 1mm - - Hittite
N° de stock RS 190-4913
Référence fabricantMAX2608EUT+T
0,927 €
Each (On a Reel of 2500)
Unité
VCO 300 → 500MHz - 0.5 SOT-23 - -40°C 85°C 3 x 1.75 x 1.3mm 1.3mm - - -
N° de stock RS 131-1242
Référence fabricantHMC1163LP5E
31,42 €
Each
Unité
VCO 9.65 → 10.41GHz - - LFCSP - -40°C 85°C 5.1 x 5.1 x 0.95mm 0.95mm - - HMC1163
N° de stock RS 160-2661
Référence fabricantHMC510LP5E
24,485 €
Each (On a Reel of 50)
Unité
VCO - - - QFN - -40°C 85°C 5.1 x 5.1 x 1mm 1mm - - Hittite
N° de stock RS 672-1520
Référence fabricantFVXO-HC53BR-8.192
3,95 €
Each
Unité
VCO 8.192MHz ±50ppm 15pF - HCMOS -40°C 85°C 5 x 3.2 x 1.4mm 1.4mm - - -
N° de stock RS 862-6152
Référence fabricantHMC509LP5E
31,18 €
Each
Unité
VCO - - - QFN - -40°C 85°C 5.1 x 5.1 x 1mm 1mm - - Hittite
N° de stock RS 145-1166
Référence fabricantSN74LS624N
2,987 €
Each (In a Tube of 25)
Unité
VCO 1.1 → 25MHz - 45pF PDIP Squarewave 0°C 70°C 19.3 x 6.35 x 4.57mm 4.57mm - - -
N° de stock RS 160-2702
Référence fabricantHMC586LC4B
171,176 €
Each (On a Reel of 50)
Unité
VCO 4 → 8GHz - - SMT - -40°C 85°C 4 x 4 x 1.2mm 1.2mm - - Hittite
N° de stock RS 862-6417
Référence fabricantHMC586LC4B
201,29 €
Each
Unité
VCO 4 → 8GHz - - SMT - -40°C 85°C 4 x 4 x 1.2mm 1.2mm - - Hittite
N° de stock RS 799-2811
Référence fabricantMAX2750EUA+
5,61 €
Each
Unité
VCO 2400 → 2500MHz - 220pF μMAX - -40°C 85°C 3.1 x 3.1 x 0.95mm 0.95mm - - -