However, even active devices have had their limitations and the parametric oscillator ... Varactors are diodes optimized to take advantage of this effect. The varactor parametric amplifier ...

They also successfully realized a frequency variable function. By integrating a varactor diode, a type of diode in which the capacity can be changed, in a resonant tunneling diode oscillator, they ...

055TSMC_VCO_01 is voltage controlled oscillator (VCO) designed to generate a high frequency ... Each LC-core has 32 capacitor units for roughly tune of frequency. A varactor is used to smoothly tune ...