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Type:
**Practical**Institute:
**
CET, Bhubaneswar
**Course:
**
B.Tech
**Specialization:
**Electronics and Instrumentation Engineering**Downloads:
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ANALOG ELECTRONICS LAB MANUAL
COLLEGE OF ENGINEERING AND TECHNOLOGY
BY
MADHAB CHNDRA TRIPATHY

LIST OF EXPERIMENTS:
1. Study of R.C phase shift oscillator by using OP-AMP
2. Study of Frequency Response of a common Emitter
Amplifier
3. Study of different application of operational amplifier
4. Application of OP-AMP as differentiator, integrator and
Square wave generator
5. Class A and B power amplifier
6. Study of Differential amplifier Circuits-DC bias operation
7. Design, assemble and Test of BJT biasing circuits
8. Study of Frequency Response of a common Source
amplifier.
9. Study of Current mirror circuits
10.Study of Darlington connections
11.Square wave testing of an amplifier

EXPERIMENT-1
STUDY OF R-C PHASE SHIFT OSCILLATOR USING OP-AMP
Aim: To calculate the frequency of the RC phase shift oscillator & to measure the
phase angles at different RC sections.
Apparatus Required:
1. Transistor BC107
2. Resistors: 10KΩ -3Nos
8KΩ or 10KΩ
22KΩ
1.2KΩ
100KΩ
3. Capacitors: 0.001µf – 3 Nos
10µF
– 2Nos
1µf
- 1 no.
4. Regulated power Supply
5. CRO
Theory:
RC-Phase shift Oscillator has a CE amplifier followed by three sections
of RC phase shift feedback Networks the output of the last stage is return to the
input of the amplifier. The values of R and C are chosen such that the phase shift
of each RC section is 60º.Thus The RC ladder network produces a total phase shift
of 180º between its input and output voltage for the given frequencies. Since CE
Amplifier produces 180 º phases shift the total phase shift from the base of the
transistor around the circuit and back to the base will be exactly 360º or 0º. This
satisfies the Barkhausen condition for sustaining oscillations and total loop gain of
this circuit is greater than or equal to 1, this condition used to generate the
sinusoidal oscillations. The frequency of oscillations of RC-Phase Shift Oscillator
is,
1

f=
----------2RC* √6
Circuit Diagram:
Procedure
1. Make the connection as per the circuit diagram as shown above.
2.
Observe the output signal and note down the output amplitude and time period
(Td).
3.
Calculate the frequency of oscillations theoretically and verify it practically
(f=1/Td).
4.
Calculate the phase shift at each RC section by measuring the time shifts (T p)
between the final waveform and the waveform at that section by using the below
formula.

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