TRIANGULAR WAVE GENERATOR USING OP AMP 741
Operational Amplifier based triangular wave form generator is simple
circuit that is widely used in function generators.
Circuit for Triangular wave generator using 741 op amp is drawn.
The integrator output waveform will be triangular if the input to it is a
Triangular wave generator can be formed by simply cascading an integrator
and a square wave generator.
First op amp functions as a comparator and next op amp as an integrator.
Sawtooth waveform can be easily generated by doing little modifications in
the triangular wave generator circuit.
Here the ‘non inverting’ terminal of second op amp is grounded, to get
sawtooth generator we just need to add a potentio meter .
It also Includes
Working Principle of Triangular wave generator.
Determine the amplitude and frequency of triangular waveform.
1. Peak to peak amplitude of triangular wave.
2. Basic Integrator Output.
3. Frequency of Oscillation.
Waveform is drawn.
A triangular waveform generator can also be constructed by a simple
alternate arrangement of a square-wave generator.
SAWTOOTH WAVE GENERATOR.
* Sawtooth wave refers to a wave form with its rise time being many times
longer than corresponding fall time or fall time very longer as compared
to the rise time.
* Sawtooth waveform can be also generated by an asymmetrical astable
multivibrator followed by an integrator.
* The sawtooth wave generators have wide application in time-base
generators and pulse width modulation circuits.
* The difference between the triangular wave and sawtooth waveform is
that the rise time of triangular wave is always equal to its fall of time
while in generator, rise time may be much higher than its fall of time .
It also Includes
2.Sawtooh wave and comparator ouputs.
3.Sawtooth wave design.
FREQUENCY OF OSCILLAION:
The frequency is reciprocal of time.
Design sawtooth wave generator using IC 741.
Derive the expression for amplitude and frequency
Images & waveform to Illustrate the function.
TIMER IC 555
The 555 integrated circuit timer was first introduced by signetics
Corporation as Type SE555/NE555.
It is available in 8-pin circular syleTO-99 Can, 8-pin mini –DIP and 14-pin
The 555 IC is widely popular and various manufactures provide the IC.
The 555 timer can be operated with dc supply voltage ranging from +5V
GENERAL DESCRIPTION OF IC 555:
Functional block Diagram of IC 555 timer is drawn.
Two comparators namely, upper comparator, lower comparator.
A control voltage input terminal accepts a modulation control input
MONOSTABLE OPERATION OF TIMER 555.
Functional Block Diagram
Connection diagram of monostable mulivibrator using 555 timer.
Voltage expression across the capacitor.
Application of Monostable Multivibator.
ASTABLE OPRATION OF TIMER IC 555:
Functional Block Diagram
Connection diagram of Astable mulivibrator using 555 timer.
Voltage expression across the capacitor
APPLICATION OF ASTABLE MULTIVIBAOR:
Schmitt Trigger using IC 555
A voltage regulator is designed to automatically maintain a constant
voltage level .
Voltage regulator- any electrical or electronic device that maintains the
voltage of a power source within acceptable limits.
The voltage regulator is needed to keep voltages within the prescribed
range that can be tolerated by the electrical equipment using that voltage.
Voltage Regulators classified into (i) Linear voltage regulators (ii)
Linear Regulators classified into (i) Series regulator (ii) Shunt regulators.
Series voltage regulators
BASICS OF VOLTAGE REGULATOR:
Linear Mode Power Supply.
Factors determining the stability.
LINEAR VOLTAGE REGULATORS USING OP-AMP:
Single Polarity Linear Voltage Regulator Using Op-amp.
Dual Tracking Voltage regulator using op-amps.
IC VOLTAGE EGULATORS:
Fixed Voltage Regulators
Adjustable output voltage Regulators.
LM 117/LM317 THREE TERMINAL ADJUSTABLE VOLTAGE
The fixed voltage regulators are designed and preset for a
particular voltage of positive /negative polarities.
There are applications which require.
1. Regulated voltage sources which are variable.
2. Some supply voltage are not available from standard
fixed voltage regulators.
LM117/337 ADJUSTABLE POSITIVE VOLTAGE REGULATORS:
These series are adjustable three terminal positive evoltage regulators
capable of supplying output current of 0.1 A to 1.5 a.
Important Specifications of LM117/337 is given.