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Laboratory 3 Rev Stability and Nonlinear

# Laboratory 3 Rev Stability and Nonlinear - 1Applied...

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1Applied Electronics Laboratory Laboratory 3 Nonlinear Circuits and Stability Purpose : Evaluate op amp stability driving a capacitive load. Construct and evaluate a nonlinear rectifier and clamp circuits. Construct and evaluate a positive feedback Schmitt trigger. Materials : Breadboard, signal generator, oscilloscope, power supply ( 15 volts), LF356 (3), LF 311, resistor assortment, .01 F capacitors, diodes (2), potentiometer (10 kΩ and 50 kΩ). Build circuits 1, 2 and 4 in advance. These will all be used in the QRS detector. 1. Construct the active rectifier circuit below. + _ LF 356 V out V in 10 k 10 k + _ LF 356 10 k 10 k 10 k Put in a 1 kHz sine wave and verify the output rectified. Demonstrate. Document errors (offset, inaccuracies) in the rectification process. Save this circuit for the QRS detector. 2 Construct the Op Amp peak detector circuit shown below. V in + _ LF 356 1 M 330 k 1 M 10 F + Drive this circuit with a 1 kHz sine wave. Demonstrate. Describe the output for various settings of the potentiometer. What happens at higher frequencies and why?

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