A varactor bridge input lowers the input bias current below a picoampere. The input diode bridge, excited by an oscillator coil, converts a dc input voltage to an ac voltage. Then you feed the ...

How does a varactor diode work? To form the PN junction that makes a diode, half the piece is doped with a trace amount of “donor atoms” that have one more electron than the intrinsic stuff to make ...

Here are a number of alternative ways to avoid problems when driving Varactor Diodes. Varactor (or “varicap”) diodes are used primarily in radio-frequency (RF) circuits to provide a ...