Opamp tools

This app is the collection of operational amplifier calculators. It is suitable for hobbyist or electronic engineer.

Features
* Inverting amplifier 
* Non-Inverting amplifier 
* Differential amplifier 
* Summing amplifier
* Inverting comparator
* First-order filter  
* Second-order filter (HPF)
* Phase shift oscillator 
* Colpitts oscillator 
* Limit 5 combinations of component values 
* Share CSV via AirDrop
* Upload CSV to iCloud Drive (For iOS8 or later)

Pro Features  
* Instrumentation amplifier 
* Non-inverting comparator
* Second-order filter (LPF)
* Wien bridege oscillator
* Hartley oscillator
* No limitation of the number of suggestions  
* Selectable 1%,5%,10%,20% of values