Analog Simulation Program TINA
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.
Linear Circuit Design Handbook - Hank Zumbahlen
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.
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.More Opamp Simulations
20th Mar 2020
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