Low phase noise VCO

January 15, 2013 // By Jean-Pierre Joosting
Z-Communications announces an RoHS compliant VCO, designated model CRO1200A-LF for high speed analog to digital converters. The VCO is designed to operate at 1200 MHz MHz within a tuning voltage range of 0.5 to 4.5 Vdc. This VCO features phase noise of -119 dBc/Hz at 10 kHz offset and a typical tuning sensitivity of 2 MHz/V.

The robust CRO1200A-LF provides the end user typical output power of -3.0 dBm into a 50 Ω load while operating off a 5 Vdc supply and drawing 20 mA, typically, over the temperature range of -40 to 85º C. This VCO features typical second harmonic suppression of -25 dBc and comes in the company's standard MINI-16-SM package measuring 1.27- x 1.27- x 0.56 -cm.

This low noise VCO is further heightened by pushing less than 0.5 MHz/V, with 5% change of the supply voltage, and pulling less than 0.5 MHz with a 12 dB return loss, any phase.