Non-Inverting Amplifier - Op-Amp Circuits
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.
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.
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
Interactive Tutorials using Virtual Electronic
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 mouse pointer
over the two buttons, no clicking. This reduces
finger strain and also you have a long lasting
mouse. 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.
Finally you have a DVM a Digital Volt Meter that
just Displays the Voltage at any Point, this readout
value has to be noted down.
Use the "iframe" part in this
Non-Inverting Op-Amp xml code