3220 test #2 summer 2003

3220 test #2 summer 2003 - Name: _ email:_ EE3220Test#2...

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Name: _______________________________ EE 3220 Test # 2 email:_________________________________    Summer 2003 1.) Why does the bandwidth of a differential amplifier extend higher, and lower than a simple  BJT inverting amplifier with DC blocking and bypass capacitors?  2.) What can we do to assure stability in a feedback loop?  Hint: This technique is used in  the LM741 op-amp. (Even with this stability some of you still managed to blow them up.) 3.) What major advantage does a crystal oscillator have over an LC resonant circuit? 4.) Why might an FET be better suited as the input stage of a voltage amplifier? 5.) Sketch a current mixing circuit. 6.) Sketch a current sampling circuit. 7.) A transresistance amplifier has an open loop gain of A r =1500, input impedance of 50 and output impedance if 85 .  It is connected to a negative feedback circuit with 
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This note was uploaded on 01/25/2012 for the course EE 3220 taught by Professor Audiffred during the Spring '06 term at LSU.

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3220 test #2 summer 2003 - Name: _ email:_ EE3220Test#2...

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