sistec ppt
TRANSCRIPT
Prepared byANURODH KUMAR
A.P(EC) Sistec-E Bhopal
SISTEC-E
◦ Function Generators can produce Square, Triangular and Sinusoidal waveforms over a wide range of frequencies and amplitudes as well as modulated waveforms (AM, FM, FSK) and signal noise.
Why a Function Generator?◦ Essential tool in Electrical Engineering◦ Can be implemented with basic inexpensive components ◦ Most circuits needed have a direct relevance to the course
Project Objectives◦ To build a low-cost Function Generator capable of:
Producing Square, Triangular and Sine waveforms with amplitude control
adjusting the waveform frequencies up to 1 MHz or higher
The function generator should be low cost
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In this Presentation we will talk about:◦ The Design◦ Performance & Results◦ Advantages & Disadvantages (Conclusion)
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Block Diagram
◦ Voltage Controlled Oscillator (VCO)
◦ Level Detector
◦ Sine Shaping Circuit
◦ Output stage (Variable Power Amplifier)
Voltage Controlled Oscillator
Level Detector
Sine Shaping Circuit
Amplifier Stage
Voltage Controlled Oscillator
Level Detector
Sine Shaping Circuit
Amplifier Stage
SISTEC-E
Wien Bridge Sine Oscillator
Compensated Triangle Oscillator Using LM6365
Triangle Oscillator with double Detector Circuit
Crystal Oscillator
Voltage Controlled Oscillator
Level Detector
Sine Shaping Circuit
Amplifier Stage
Simplified Triangle Oscillator with single voltage detector (Final VCO based on this circuit)
SISTEC-E
Voltage Controlled Oscillator
Level Detector
Sine Shaping Circuit
Amplifier Stage
Wien Bridge Sine Oscillator
Compensated Triangle Oscillator Using LM6365
Triangle Oscillator with double Detector Circuit
Crystal Oscillator
Simplified Triangle Oscillator with single voltage detector Final Selection
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Voltage Controlled Oscillator
Level Detector
Sine Shaping Circuit
Amplifier Stage
Overdriven CA3080
Breakpoint Sine Shaper
BJT non-linear amplifier
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Voltage Controlled Oscillator
Level Detector
Sine Shaping Circuit
Amplifier Stage
Variable Inverting Amplifier with Offset Adjustment
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Waveforms Produced◦ Triangular, Square and Sinusoidal
Overall Frequency Range: 4 Hz – 1.3 MHz Practical Frequency Range:
◦ Triangle: 4 Hz to 500 kHz◦ Square: 4 Hz to 1.3 MHz & up◦ Sine: 30 kHz to 1.3 MHz & up (independent)◦ Sine: 30 kHz to 500 kHz (dependent)
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Duty Cycle Adjustment: 1% - 80% Amplitude Control: 0 V – 26 V p-p DC Offset Control: 0V - +/- 5 V THD of Sinewave:
◦ 0.768 % at 500 kHz, 50% D.C.◦ 0.878 % at 10 kHz, 50% D.C. ◦ 1.155 % at 1.0 MHz, 50% D.C.
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