Op-Amps & Analog
Every op-amps & analog calculator on CalcEngines — unit converters, derived indices and interpretive tools, each with its formula, a worked example and the reference intervals it is judged against.
4 calculators in this section
- BJT as a Switch Calculator (Base Resistor)Base resistor for an NPN transistor switching a lamp, relay or motor from a microcontroller pin — with the overdrive factor that keeps it saturated, the nearest standard value rounded down, and a check that the pin can supply the base current.
- Comparator Hysteresis (Schmitt Trigger) CalculatorUpper and lower switching thresholds, hysteresis width and centre for a comparator with positive feedback — inverting or non-inverting, push-pull or open-drain — plus a design mode that picks the resistors for the thresholds you want.
- Op-Amp Inverting Amplifier CalculatorGain, gain in decibels and output voltage of an inverting op-amp stage, whether the output clips against your supply rails, the input impedance it presents — and standard resistor pairs for a target gain.
- Op-Amp Non-Inverting Amplifier CalculatorGain 1 + Rf/R1, gain in decibels, output voltage and rail clipping for a non-inverting op-amp stage — plus the two speed limits that catch beginners out: closed-loop bandwidth and full-power bandwidth.