3220 test #2 summer 2001

3220 test#2 summer - Name SSN 1 EE3220Test#2 Summer2001 ForaBJT, a b c d ~10x r~10x ro~10x rx~10x x=1,2,3,4(circleone x=1,2,3,4(circleone

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EE 3220 Test # 2     SSN: _________________________________    Summer 2001 1.) For a BJT, what order of magnitude are the following parameters: a.) β  ~  10 x x = 1, 2, 3, 4   (circle one) b.) r Π  ~ 10 x x = 1, 2, 3, 4   (circle one) c.) r o  ~ 10 x x = 3, 4, 5, 6   (circle one) d.) r x  ~ 10 x x = 1, 2, 3, 4   (circle one) 2.) In a differential amplifier design, why would the BJT current source be a better  choice than using an emitter resistor? 3.) What major advantage does the current mirror have over the BJT current  source? 4.) What advantage does the widlar source have over the current mirror? 5.) Design a widlar source to produce I o =0.2mA.  Supply voltages are: V CC  =+10  Volts, and V EE  = -10 Volts.  (All this consists of is calculating resistor values for R and R A .)  Assume V f  = 0.7 V and 
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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 - Name SSN 1 EE3220Test#2 Summer2001 ForaBJT, a b c d ~10x r~10x ro~10x rx~10x x=1,2,3,4(circleone x=1,2,3,4(circleone

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