Non-Inverting Amplifier - Op-Amp Circuits
The input impedance of this module is very high, if U1 is OP07 it is in mega ohms, use CA3140 or LF356 fet input opamps to get 1 tera ohm input impedance, but for high gains OP07 is better as it is ultra low offset, this is a good amplifier for sensor outputs, as in a DC Circuit.
Non-Inverting Opamp Interactive Simulation
This High-Input Impedance configuration is commonly used in front end of sensor signal conditioner and Meters. This page Includes an Interactive Tutorial with Simulated Meters and Potentiometers, demonstrating how a Non-Inverting Operational Amplifier functions.
This has Virtual Meters and Pots, shows how a Operational Amplifier works. Slide the Potentiometers and vary the mV Source, See Output DVM. Slide the Potentiometers just like you would operate a Sliding Control. Drag the Knob on Pot to increase or decrease the resistance. The Resistance is shown is blue letters and dynamically alters value as you slide the pot. The mV Source is varied by just moving or hovering mouse pointer over the two buttons, no clicking. The mV buttons are special, the variation picks up speed if you let the mouse pointer remain on the button. This is Ramp-up and Ramp-down. This enables you to set it faster with just two buttons.
The zener diodes protect the opamp inputs, R1 limits current during high voltage inputs and R1 and C1 form a filter to remove ac components C1 should be a plastic type as ceramic and electrolytic caps are leaky. A large C1 will slow the response time, the sum of Ri + Rf should be greater than 5k so that output is not loaded. also do not connect output to voltages more than vcc/vdd it will blow Opamp.
Vout = Vin * (Rf + Ri) / Ri
These are various web widgets i developed a decade ago. These were tutorials in Electronics and Technology. It also demonstrates usability issues in small devices and using JS-CSS-Ajax in a Innovative way to make GUI dynamic, interactive and contextual. Some of the Ideas were the first of its kind in the GUI design.
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