Operational Amplifier Fundamentals Unit 1 – The Operational Amplifier
Exercise 2 – Op Amp Circuit Board Familiarization
EXERCISE OBJECTIVE
When you have completed this exercise, you will be familiar with the operation of the
OPERATIONAL AMPLIFIER FUNDAMENTALS circuit board. You will verify your results
by observation and measurements.
EXERCISE DISCUSSION
- Three basic op amp configurations are used on your circuit board.
- Only the open-loop configuration does not require a feedback path (resistor).
- Inverting and non-inverting configurations generally require a feedback resistor to provide
negative feedback. - There are eight training circuit blocks on the op amp board.
- Three other general purpose blocks are also required to support the training procedure.
- The three general purpose blocks are labeled FOR GENERATOR BUFFER,
ATTENUATOR, and VOLTAGE DIVIDER. - The ATTENUATOR circuit block reduces an input voltage, or signal, by a factor of 10
(OUT = IN/10). - Certain procedural steps require a low-amplitude input signal. The ATTENUATOR allows
you to precisely adjust the output amplitude of a signal generator. - The VOLTAGE DIVIDER circuit block generates a variable low-voltage output between
+2.5 Vdc and -2.5 Vdc. - If a two-post connector is inserted into the circuit block, the range of output voltage is
reduced to between +0.5 Vdc and -0.5 Vdc. - The circuit block labeled FOR GENERATOR BUFFER is used with an optional generator
buffer plug-in module. This module interfaces devices without 50 output impedance to the
circuits on your circuit board.