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 Package Type Output Level Minimum Operating Temperature Maximum Operating Temperature Dimensions Height Maximum Operating Supply Voltage Minimum Operating Supply Voltage Series
RS庫存編號 806-2567
製造零件編號MC100EL1648DG
HK$74.70
單位
VCO 1.1 GHz - 6pF SOIC ECL -40 °C +85 °C 5 x 4 x 1.5mm 1.5mm 5.5 V 4.2 V -
RS庫存編號 163-0465
製造零件編號MC100EL1648DG
HK$69.395
毎管:98 個
單位
VCO 1.1 GHz - 6pF SOIC ECL -40 °C +85 °C 5 x 4 x 1.5mm 1.5mm 5.5 V 4.2 V -
RS庫存編號 923-2473
製造零件編號SN74LS629N
HK$39.384
毎管:25 個
單位
- - - - SOIC - 0 °C +70 °C 19.3 x 6.35 x 4.57mm 4.57mm 5.25 V 4.75 V -
RS庫存編號 442-870
製造零件編號SN74LS629N
HK$41.98
單位
VCO 1.1 → 25 MHz - 45pF PDIP Squarewave 0 °C +70 °C 19.3 x 6.35 x 4.57mm 4.57mm 5.25 V 4.75 V -
RS庫存編號 917-3438
製造零件編號LTC6908CS6-1#TRMPBF
HK$22.161
個 (在毎卷:500)
單位
VCO 50 kHz → 10 MHz 300ppm/√kh 5pF TSOT-23 CMOS -40 °C +85 °C 2.9 x 1.5 x 0.9mm 0.9mm 5.5 V 2.25 V -
RS庫存編號 423-462
製造零件編號LTC6908CS6-1#TRMPBF
HK$34.34
單位
VCO 50 kHz → 10 MHz 300ppm/√kh 5pF TSOT-23 CMOS -40 °C +85 °C 2.9 x 1.5 x 0.9mm 0.9mm 5.5 V 2.25 V -
RS庫存編號 862-6089
製造零件編號HMC385LP4E
HK$106.62
單位
VCO 2.25 → 2.5 GHz - - QFN - -40 °C +85 °C 4.1 x 4.1 x 1mm 1mm 3.25 V 2.75 V Hittite
RS庫存編號 160-2670
製造零件編號HMC584LP5E
HK$277.499
個 (在毎卷:50)
單位
VCO 6.25 → 6.95 (Output 2) GHz, 12.5 → 13.9 (Output 1) GHz - - QFN - -40 °C +85 °C 5.1 x 5.1 x 1mm 1mm 5.25 V 4.75 V Hittite
RS庫存編號 165-9525
製造零件編號MAX2750EUA+
HK$40.49
毎管:50 個
單位
VCO 2400 → 2500 MHz - 220pF μMAX - -40 °C +85 °C 3.1 x 3.1 x 0.95mm 0.95mm 5.5 V 2.7 V -
RS庫存編號 160-2662
製造零件編號HMC511LP5E
HK$268.69
個 (在毎卷:50)
單位
VCO 4.525 → 5.075 (Output 2) GHz, 9.05 → 10.15 (Output 1) GHz - - QFN - -40 °C +85 °C 5.1 x 5.1 x 1mm 1mm 5.25 V 4.75 V Hittite
RS庫存編號 862-6164
製造零件編號HMC511LP5E
HK$284.80
單位
VCO 4.525 → 5.075 (Output 2) GHz, 9.05 → 10.15 (Output 1) GHz - - QFN - -40 °C +85 °C 5.1 x 5.1 x 1mm 1mm 5.25 V 4.75 V Hittite
RS庫存編號 905-5857
製造零件編號CVCO55BE-0510-0770
BrandCrystek
HK$190.53
單位
VCO 770 MHz - - SMD VCO -40 °C +85 °C 12.7 x 12.7 x 3.81mm 3.81mm 9.45 V dc 8.55 V dc -
RS庫存編號 131-1242
製造零件編號HMC1163LP5E
HK$324.05
單位
VCO 9.65 → 10.41 GHz - - LFCSP - -40 °C +85 °C 5.1 x 5.1 x 0.95mm 0.95mm 5.5 V - HMC1163
RS庫存編號 442-864
製造零件編號SN74LS624N
HK$29.93
單位
VCO 1.1 → 25 MHz - 45pF PDIP Squarewave 0 °C +70 °C 19.3 x 6.35 x 4.57mm 4.57mm 5.25 V 4.75 V -
RS庫存編號 162-7068
製造零件編號SN74LS628NE4
HK$24.531
毎管:25 個
單位
- 1.1 → 25 MHz - 45pF SOIC Squarewave 0 °C +70 °C 19.3 x 6.35 x 4.57mm 4.57mm 5.25 V 4.75 V -
全新
RS庫存編號 190-4913
製造零件編號MAX2608EUT+T
HK$9.775
個 (在毎卷:2500)
單位
VCO 300 → 500 MHz - 0.5pF SOT-23 - -40 °C +85 °C 3 x 1.75 x 1.3mm 1.3mm - 2.7 V -
RS庫存編號 862-6433
製造零件編號HMC732LC4B
HK$1,129.68
單位
VCO 6 → 12 GHz - - SMT - -40 °C +85 °C 4 x 4 x 1.2mm 1.2mm 5.5 V - Hittite
RS庫存編號 662-4573
製造零件編號SN74LS628NE4
HK$28.622
/個 (每包:5個)
單位
VCO 1.1 → 25 MHz - 45pF PDIP Squarewave 0 °C +70 °C 19.3 x 6.35 x 4.57mm 4.57mm 5.25 V 4.75 V -
RS庫存編號 799-2811
製造零件編號MAX2750EUA+
HK$57.01
單位
VCO 2400 → 2500 MHz - 220pF μMAX - -40 °C +85 °C 3.1 x 3.1 x 0.95mm 0.95mm 5.5 V 2.7 V -
RS庫存編號 862-6152
製造零件編號HMC509LP5E
HK$284.80
單位
VCO 3.9 → 4.4 (Output 2) GHz, 7.8 → 8.8 (Output 1) GHz - - QFN - -40 °C +85 °C 5.1 x 5.1 x 1mm 1mm 5.25 V 4.75 V Hittite