Voltage Controlled Oscillator

Voltage Controlled Oscillator

A Voltage Controlled Oscillator (VCO) is an oscillating circuit whose output frequency changes in direct proportion to an input voltage. VCOs can be made to oscillate from a few Hertz to hundreds of GHz. Every wireless device in use today has some sort of voltage controlled oscillator inside it. For example, there is a least one VCO inside every cell phone that generates the Radio Frequency (RF) waves that are used to communicate by-directionally to the cell tower.

voltage controlled oscillator

A Voltage Controlled Oscillator Frequency

A VCO output frequency is stabilized or controlled with a Resonator. The lower the close-in Phase Noise requirement, the higher the Quality Factor (Q) of the Resonator needs to be. A Resonator can be as simple as an Inductor or as complex as a Quartz Crystal. The Table below lists some of the most popular Resonator types with their accompanying typical Q value in ascending order.

Resonator Type Quality Factor
Inductor 20~150
Transmission Line 200~350
Coaxial 300~600
SAW ~10K
Crystal 20K~300K
   

Voltage Controlled Oscillator Design

There are two main categories of VCO designs. Those built with Monolithic Integrated Circuits (I.Cs) and the other of discrete components. The choice is primarily dictated by the resonator requirement. That is, with today’s technology, a quartz crystal resonator cannot be easily integrated due to the technology mix and size. Consequently, ultra-low phase noise VCOs are of discrete designs using the appropriate resonator type.

Crystek Corporation is a company that designs and sells VCOs using discrete designs using all the resonators listed on the table above. These discrete VCOs will outperform any integrated voltage controlled oscillator design due to the very high Q afforded by the resonator.

View the complete line of Crystek Voltage Controlled Oscillators by Clicking Here 

Crystek’s CVCO55CCQ-3200 VCO

Fort Myers, FL – May 11, 2012 Crystek’s CVCO55CCQ-3200-3200 VCO (Voltage Controlled Oscillator) operates at 3200 MHz with a control voltage range of 0.5V~4.5V. This VCO features a typical phase noise of -115 dBc/Hz @ 10KHz offset and has excellent linearity. Output power is typically +6 dBm.

 Engineered and manufactured in the USA, the model CVCO55CCQ-3200-3200 is packaged in the industry-standard 0.5-in. x 0.5-in. SMD package. Input voltage is 6V, with a typ. current consumption of 27 mA. Pulling and Pushing are minimized to 0.3 MHz and 0.1 MHz/V, respectively. Second harmonic suppression is -12 dBc typical.

 The CVCO55CCQ-3200-3200 is ideal for use in applications such as digital radio equipment, fixed wireless access, satellite communications systems, and base stations.

NEW 2558-2575 MHz VCO

Fort Myers, FL – April 9, 2012

Crystek’s CVCO55CC-2558-2575 VCO (Voltage Controlled Oscillator) operates from 2558 MHz to 2575 MHz with a control voltage range of 0.3V~4.7V. This VCO features a typical phase noise of -120 dBc/Hz @ 10KHz offset and has excellent linearity. Output power is typically +8 dBm.

Engineered and manufactured in the USA, the model CVCO55CC-2558-2575 is packaged in the industry-standard 0.5-in. x 0.5-in. SMD package. Input voltage is 8V, with a max. current consumption of 29 mA. Pulling and Pushing are minimized to 2.0 MHz and 0.2 MHz/V, respectively. Second harmonic suppression is -15 dBc typical.

The CVCO55CC-2558-2575 is ideal for use in applications such as digital radio equipment, fixed wireless access, satellite communications systems, and base stations.

For pricing details, contact Crystek Corporation.

NEW 2800-3075 MHz VCO FROM CRYSTEK CORPORATION

2800-3075 MHz VCOFort Myers, FL – March 23, 2012 – Crystek’s CVCO55CC-2800-3075 VCO (Voltage Controlled Oscillator) operates from 2800 MHz to 3075 MHz with a control voltage range of 1.0V~15V. This VCO features a typical phase noise of -104 dBc/Hz @ 10KHz offset and has excellent linearity. Output power is typically +2 dBm.

Engineered and manufactured in the USA, the model CVCO55CC-2800-3075 is packaged in the industry-standard 0.5-in. x 0.5-in. SMD package. Input voltage is 5V, with a max. current consumption of 20 mA. Pulling and Pushing are minimized to 4.0 MHz and 2.0 MHz/V, respectively. Second harmonic suppression is -15 dBc typical.

The CVCO55CC-2800-3075 is ideal for use in applications such as digital radio equipment, fixed wireless access, satellite communications systems, and base stations.

For pricing details, contact Crystek Corporation.

NEW 5200 MHz VCO (Voltage Controlled Oscillator)

Fort Myers, FL – February 17, 2012 – Crystek’s CVCO33BE-5200-5200 VCO (Voltage Controlled Oscillator) operates at 5200 MHz with a control voltage range 0.5V~4.5V. This VCO features a typical phase noise of -84 dBc/Hz @ 10KHz offset and has excellent linearity. Output power is typically +3 dBm.

Engineered and manufactured in the USA, the model CVCO33BE-5200-5200 is packaged in the industry-standard 0.5-in. x 0.5-in. SMD package. Input voltage is 5V, with a max. current consumption of 26 mA. Pulling and Pushing are minimized to 6.0 MHz and 3.0 MHz/V, respectively. Second harmonic suppression is -20 dBc typical.

The CVCO33BE-5200-5200 is ideal for use in applications such as digital radio equipment, fixed wireless access, satellite communications systems, and base stations.

For pricing details, contact Crystek Corporation.

 

NEW 3750-3800 MHz VCO | CRYSTEK CORPORATION

CRYSTEK CORPORATION

3750-3800 MHz VCOFort Myers, FL – December 8, 2011 – Crystek’s CVCO55CC-3750-3800 VCO (Voltage Controlled Oscillator) operates from 3750 MHz to 3800 MHz with a control voltage range of 0.5V~16V. This VCO features a typical phase noise of -105 dBc/Hz @ 10KHz offset and has excellent linearity. Output power is typically +2 dBm.

Engineered and manufactured in the USA, the model CVCO55CC-3750-3800 is packaged in the industry-standard 0.5-in. x 0.5-in. SMD package. Input voltage is 5V, with a max. current consumption of 30 mA. Pulling and Pushing are minimized to 1.0 MHz and 2.5 MHz/V, respectively. Second harmonic suppression is -15 dBc typical.

The CVCO55CC-3750-3800 is ideal for use in applications such as digital radio equipment, fixed wireless access, satellite communications systems, and base stations.

Crystek’s CVCO55CW-3050-4250 VCO

Fort Myers, FL – November 4, 2011 – Crystek’s CVCO55CW-3050-4250 VCO (Voltage Controlled Oscillator) Crystek's CVCO55CW-3050-4250 VCOoperates from 3050 MHz to 4250 MHz with a control voltage range of 1.5V~18.5V. This VCO features a typical phase noise of -85 dBc/Hz @ 10KHz offset and has excellent linearity. Output power is typically +1.5 dBm. Engineered and manufactured in the USA, the model CVCO55CW-3050-4250 is packaged in the industry-standard 0.5-in. x 0.5-in. SMD package. Input voltage is 5V, with a max. current consumption of 16 mA. Pulling and Pushing are minimized to 5.0 Mhz and 5.0 MHz/V, respectively. Second harmonic suppression is -15 dBc typical.

Crystek’s CVCO55CW-1200-2100 VCO (Voltage Controlled Oscillator)

Crystek's CVCO55CW-1200-2100 VCO (Voltage Controlled Oscillator)CRY-223webFort Myers, FL – October 13, 2011 – Crystek’s CVCO55CW-1200-2100 VCO (Voltage Controlled Oscillator) operates from 1200 MHz to 2100 MHz with a control voltage range of 0.5V~25V. This VCO features a typical phase noise of -95 dBc/Hz @ 10KHz offset and has excellent linearity. Output power is typically +6 dBm. Engineered and manufactured in the USA, the model CVCO55CW-1200-2100 is packaged in the industry-standard 0.5-in. x 0.5-in. SMD package. Input voltage is 12V, with a max. current consumption of 35 mA. Pulling and Pushing are minimized to 25.0 MHz and 10.0 MHz/V, respectively. Second harmonic suppression is -8 dBc typical.

NEW CVCOFLM VCO FROM CRYSTEK CORPORATION

FEATURES EXTRA MODULATION PORT FOR TRANSMITTER APPLICATIONS

CRY-197 Voltage Controlled OscillatorFort Myers, FL – December 17, 2010 – Crystek’s CVCO55FLM VCOs (Voltage Controlled Oscillator) contain an extra modulation port (TX modulation), making the family an ideal choice for transmitter applications. The modulation port has a negative slope and a typical modulation sensitivity of -20KHz/V.

The CVCO55FLM-0172-0210 operates from 172 MHz to 210 MHz with a control voltage range of 0.2V~4.8V. This VCO features a typical phase noise of -119 dBc/Hz @ 10KHz offset and has excellent linearity. Output power is typically 0 dBm.

Engineered and manufactured in the USA, the model CVCO55FLM-0172-0210 is packaged in the industry-standard 0.5-in. x 0.5-in. SMD package. Input voltage is 3V, with a max. current consumption of 9 mA. Pulling and Pushing are minimized to 1.0 MHz and 0.5 MHz/V, respectively. Second harmonic suppression is -20 dBc typical.

For pricing details, contact Crystek Corporation.

Family datasheets are available for download at www.crystek.com. For more information,
contact sales at Crystek Corporation, 12730 Commonwealth Drive, Ft. Myers, FL 33913. 
Tel: 800-237-3061 or 239-561-3311; Fax: 239-561-1025; E-mail: sales@crystek.com;
Web: www.crystek.com.

NEW HERMETICALLY SEALED TO-8 VCO

TO-8 voltage controlled oscillatorFort Myers, FL – October 28, 2010 – Crystek Corporation has introduced a new series of
TO-8 VCOs (Voltage Controlled Oscillators) to provide high-performance frequency control in harsh, demanding environments. Crystek’s CVCOT8BE line features a full-functioning VCO in a rugged, hermetically sealed TO-8 package to protect the VCO from moisture, contaminants and other environmental elements. The metal-can construction features gold plated pins with no internal wire bonds for enhanced signal integrity.

Two models are currently available: the CVCOT8BE-2100-2200 (2100-2200 MHz) and CVCOT8BE-2400-2500 (2400-2500MHz); additional models can be configured from 1GHz to 5GHz in bands. These VCOs feature a typical phase noise of -101 dBc/Hz @ 10KHz offset and excellent linearity.  Tuning sensitivity is rated at 55 MHz/V. Pulling and Pushing are minimized to 11.0 MHz and 1.0 MHz/V, respectively; second harmonic suppression is -15 dBc typical.

Engineered and manufactured in the USA, the CVCOT8BE VCOs feature a control voltage range of 0.5V~4.5V with an input voltage of 8 V.  Maximum current consumption is 25 mA and output power is 0 dBm. Crystek’s TO-8 VCO line has an operating temperature range of -40 to +85°C

For pricing details, contact Crystek Corporation.

Crystek will be featuring the TO-8 VCOs at electronica in Munich, Germany, Nov. 9-12, Hall B6, Booth 360. Family datasheets are available for download at www.crystek.com. For more information, contact sales at Crystek Corporation, 12730 Commonwealth Drive, Ft. Myers, FL 33913.  Tel: 800-237-3061 or 239-561-3311; Fax: 239-561-1025; E-mail: sales@crystek.com

NEW 2122-2242 MHz VCO

Fort Myers, FL – September 2, 2010 – Crystek’s CVCO55CC-2122-2242 VCO (Voltage Controlled Oscillator) operates from 2122 MHz to 2242 MHz with a control voltage range of 0.5V~4.5V. This VCO features a typical phase noise of -105 dBc/Hz @ 10KHz offset and has excellent linearity. Output power is typically +7 dBm.

Engineered and manufactured in the USA, the model CVCO55CC-2122-2242 is packaged in the industry-standard 0.5-in. x 0.5-in. SMD package. Input voltage is 5 V, with a max. current consumption of 40 mA. Pulling and Pushing are minimized to 1.5 MHz and 1.5 MHz/V, respectively. Second harmonic suppression is -15 dBc typical.

The CVCO55CC-2122-2242 is ideal for use in applications such as digital radio equipment, fixed wireless access, satellite communications systems, and base stations.

For pricing details, contact Crystek Corporation.

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