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Varactor Diodes Control Crystal Oscillator Circuits

Designed to control the frequency of crystal oscillator circuits, the 3022 series of high-ratio, hyperabrupt varactor tuning diodes is designed to deliver a dc bias control voltage from -0.3V to -4V. The diodes exhibit a capacitance variation over this voltage range of approximately 10:1. They can be customized for specific applications and their ion implanted structure promises a high capacitance swing, linear characteristics, and uniform capacitance and temperature coefficients. Available packages include SOT-23 with single, common cathode or common anode, SOD-323, and a subminiature SOD523. For prices, contact KNOX SEMICONDUCTOR INC., Rockport, MA. (207) 236-6076.


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