This is an application for the design and calculation of electronic circuits using operational amplifiers.The application content is available in eight languages: English, French, German, Italian, Portuguese, Russian, Spanish, Ukrainian.The application contains the following guides and calculators: Amplifiers - Non-inverting operational amplifier - Inverting operational amplifier - Inverting amplifier with T-bridge in OS - Differential amplifier (info) - Differential amplifier with T-bridge in OS (pro) - Voltage repeater (info) - Inverting voltage repeater (info) (pro) - AC voltage amplifier (pro) - High Input Impedance AC Voltage Amplifier (pro) - AC voltage repeater (info) (pro) (draft) ActiveFilters - Non-inverting low-pass filter - Inverting low-pass filter - Non-inverting high-pass filter - Inverting high pass filter - Bandpass filter (pro) - Gyrator Integrators and differentiators - Voltage integrator (info) - Sum integrator (info) - Integrator with signal amplification (info) (pro) (draft) - Difference integrator (info) - Double integrator (info) - Voltage differentiator (info) - Sum Differentiator (info) (pro) - Differentiator with T-bridge (info) (pro) - Differentiator with T-bridge made of capacitors (info) (pro) - Difference differentiator (info) (pro) Comparators - Comparator - Limiter (info) - Limiter with zener diode at the input (info) - Voltage reference (pro) (draft) - RS trigger (pro) Attenuators - Non-inverting attenuator - Inverting attenuator Converters - Voltage-to-current converter with non-inverting input - Voltage to current converter with inverting input - Voltage to current converter with differential input Adders and substactors - Inverting adder - Addition-subtraction circuit - Non-inverting adder Logarithmic and exponential amplifiers - Diode-based logarithmic amplifier - Transistor-based logarithmic amplifier - Diode exponential amplifier - Exponential transistor amplifier - Popular operational amplifiers description and pinoutThe program contains full-text search functionality. Also, the app can switch between a light and dark theme, depending on the users preferences.