LC oscillator calculator: Colpitts, Clapp, Hartley
LC oscillator calculator for Colpitts, Clapp and Hartley circuits — frequency, feedback ratio, the condition for oscillation and sensitivity to device capacitance.
PLL calculator: dividers and loop filter
PLL synthesiser calculator — divider ratios, loop natural frequency and damping, in-band phase noise and lock time.
DDS calculator: tuning word, images and spurs
Direct digital synthesis (DDS) calculator — frequency tuning word, resolution, first image frequency, sinc roll-off and SFDR.
VXO calculator: pulling a crystal
VXO calculator — how far a crystal oscillator can be pulled with load capacitance, the theoretical maximum, and extending the range with a series coil.