The term operational amplifier (Op. Amp.)
refers to high gain dc amplifier that has a differential input
(two input leads) and a single ended output (one output lead).
Op. Amps. have characteristics such as high input resistance,
low output resistance, high gain, low drift etc., that make
them highly suitable for many applications and therefore,
wide spread use in electronic circuits.
The experimental set-up on the study of
Op. Amp. consists of a 741 IC with facilities for convenient
connections, two regulated power supplies (±12V), a
variable voltage source and a multirange digital voltmeter
with 3½ digit LED display.
The resistances (0.1% metal film) required are mounted on
the board separately, which may be connected as and when required
through patch chords. The student can also connect external
components, if required.
The following studies can be carried
- Working of the basic circuit
- Measurement of bias and offset currents
- Study of inverting and non-inverting
- Introduction to amplifier drift
The above experimental set-up has been laid
down on a decorated bakelite board with an aim of providing
an easy understanding to the students. All components are
well spread out for clarity and easy repairs and replacement.
The set-up is provided with a booklet, which contains its
detailed theory of operation, description, specifications,
suggestions and discussion on the various experiments that
may be performed with it.
The set-up is complete in all respect.