LC low-pass and high-pass filter calculator
LC filter calculator for low-pass and high-pass Butterworth or Chebyshev designs β component values, nearest E12 values and stopband attenuation, with the circuit.
LC bandpass filter calculator
LC bandpass filter calculator β series and parallel tuned-circuit values transformed from a low-pass prototype, with a warning when the bandwidth gets too narrow.
Crystal ladder filter calculator
Crystal ladder filter calculator β coupling capacitors, termination impedance, external Q and how closely the crystals must be matched, with the circuit.
Quartz crystal parameters calculator
Quartz crystal parameters calculator β motional Cm, Lm, Q and parallel resonance from measured fs and fp or the G3UUR method, plus the pulling range.
Diplexer calculator
Constant-impedance diplexer calculator for a mixer β first- and third-order low-pass and high-pass branch values, and why the unwanted branch must be terminated.
Notch filter calculator
LC notch filter calculator β notch depth as a function of coil Q, notch width at several levels, and both series and parallel circuits.