Lab5_prelabsRevB_Fall08

# Lab5_prelabsRevB_Fall08 - Their Fourier series are: t n n n...

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Name _________________________________ ECE 2100 Op-Amp Circuits Lab 5 Week 1 Using Google, look up the input bias current for the LF353 op-amp and predict the time rate of change of the output voltage for the circuit below - after the switch opens. Input Bias Current = 50pA ; C = 10pF C (dV/dt) = I dV/dt = I/C dV/dt = 50pA/10pF dV/dt = 5 V/s ______ __________ __________ = dt dV 1

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Name _________________________________ ECE 2100 Op-Amp Circuits Lab 5 Week 2 Design a bandpass audio amplifier with a passband gain of 10 suitable for human hearing (50 Hz to 20 kHz) and draw your circuit below. Make a Bode plot for your design. 2 Freq. (Hz) 20 log ( V 0 / V in ) 10 10 2 10 3 10 4 10 5
Name _________________________________ ECE 2100 Op-Amp Circuits Lab 5 Week 3 1. Derive why the threshold for the non-inverting Schmidt trigger, is given by: CC T V R R V 2 1 = Assume there is no voltage-margin for the op amp. 2. Designing a Function Generator In lab you will build a circuit with a triangle and square wave output. Your goal here is to design a filter to make a cosine wave by filtering out the height harmonics of one of these.

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Unformatted text preview: Their Fourier series are: t n n n V n m ,... 5 , 3 , 1 cos 2 sin 4 : wave Square ϖ π ∑ = t n n V n m ,... 5 , 3 , 1 2 2 cos 8 : wave Triangle ∑ = 3 where ϖ =2 π/ T with T being the period of the signal and V m is the maximum voltage. For which of these two waveforms is the ratio of the absolute value of the voltage of the fundamental with respect to the third harmonic the largest? For this choice, what is that ratio of the first ( ) to third harmonic (| V 1 / V 3 | = __________)? Design a low pass filter that is another 7 db down at the third harmonic, compared to the first harmonic, and sketch the circuit below, under the assumption that T = 1 ms. Draw the Bode plot for your filter. By h ow much will your filter attenuate the fundamental? 4 Freq. (rad/s) 20 log ( V / V in ) 3 rd harmonic 0.1 ϖ 1 ϖ 10 ϖ 100 ϖ-20-10...
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## This note was uploaded on 03/31/2009 for the course ECE 210 taught by Professor Staff during the Spring '08 term at Cornell.

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Lab5_prelabsRevB_Fall08 - Their Fourier series are: t n n n...

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