The MVCO3950A from BOWEI Integrated Circuits is a Voltage Controlled Oscillator with Frequency 3700 to 4225 MHz, Power 1.585 mW, Tuning Sensitivity 46 MHz/V, Tuning Voltage 1 to 15 V, Phase Noise -115 to -95 dBc/Hz. Tags: Surface Mount. More details for MVCO3950A can be seen below.