Circuit Calculator is a design tool for electronics engineers and all electronics enthusiasts.
Convenience visibility and ability to find an optimal solution in minimum time.

You can try Circuit Calculator Demo before you buy.

Supports these and more:

Amplifiers:
* Inverting
* Non-Inverting
* Differential

Variable Gain Amplifiers:
* Inverting
* Non-Inverting

Drivers:
* Active Termination
* Differential
* Balanced

Lowpass Filters:
* One Pole Passive
* One Pole Active
* Multiple Feedback
* Sallen-Key
* RLC

Highpass Filters:
* One Pole Active
* Multiple Feedback
* Sallen-Key

Bandpass Filters:
* Multiple Feedback
* Sallen-Key

Bandstop Filters:
* Multiple Feedback
* Sallen-Key

Power:
* Boost DC/DC converter
* Buck DC/DC converter
* SEPIC DC/DC converter
* Ćuk DC/DC converter
* ZETA DC/DC converter
* Vout of DC/DC Converter
* Zener Diode Series Resistor
You can add your DC/DC controller IC.

Others:
* Active Rectifiers
* Pierce-Gate Oscillator
* LED Level Meter
* Impedance Matching

Reverse: calculation of circuit parameters at known values of its components if it is possible.

Auxiliary tools.

You can use Filter Designer to design multistage active filters.