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1) Fill in the table Transistor � � I 1 1 0.1mA 2 0.2mA 3 3 4 3 5 3 6 10mA V6 (Volts) R6 Ohms 275 VDD (volts) +5V VSS (Volts) -5V Iref (amps) �!�"# = 200� − 6 $ %! �&�"# = 150� − 6 $ %! �'! = �'& = 0.5�, V() * = 10 % +, V(- * = 8 % +, �,.! = 0.25�� 2) This amplifier can be analyzed with the the small signal model shown. If L=Lmin, Iref=50µA, find: gm1: __________ Rin __________ Rout: __________ Av0: __________ �!�"# = 200� − 6 $ %! �&�"# = 150� − 6 $ %! �'! = �'& = 0.5�, V() * = 10 % +, V(- * = 8 % +, �,.! = 0.25�� 3) For this amplifier, find the largest differential input voltage which maintains the small signal approximation (minimizing distortion) as well as the DC voltage at the Source VS, differential gain, and Iref �!" = 0.25� �## = 8� �# = 100�Ω �$% = 1.05� & ' = 10 a) Max vid: _______ b) VS : _______ c) Ad: _______ d) IREF: _______ �!�"# = 200� − 6 $ %! �&�"# = 150� − 6 $ %! �'! = �'& = 0.5�, V() * = 10 % +, V(- * = 8 % +, �,.! = 0.25�� 4) For this common-source amplifier biased and with blocking capacitors as you mind find a discrete application such as lab, find the time constant and pole frequency associated with the gate, source and drain as shown. Also find the voltages, currents etc. in the table. �!�"# = 200� − 6 $ %! �&�"# = 150� − 6 $ %! �'! = �'& = 0.5�, V() * = 10 % +, V(- * = 8 % +, �,.! = 0.25�� Vov ID 150 µA Vgs Vd gm �!"# �!"# �!"$ �!"$ �!% �!% 5) The Miller effect allows a shortcut to understand the effective impedance seen on both sides of a feedback amplifier. If Z is a 2MΩ impedance, and K=-5000, find Z1 and Z2 Z1 :________ Z2 :________ �!�"# = 200� − 6 $ %! �&�"# = 150� − 6 $ %! �'! = �'& = 0.5�, V() * = 10 % +, V(- * = 8 % +, �,.! = 0.25�� �!�"# = 200� − 6 $ %! �&�"# = 150� − 6 $ %! �'! = �'& = 0.5�, V() * = 10 % +, V(- * = 8 % +, �,.! = 0.25�� 6) For an amplifier with negative feedback, bandwidth can be increased for a decrease in gain. Ignoring response below 100Hz (assume fL<<100Hz), and with a feedback factor of 0.05, open loop gain of 100k V/V find 1) -3dB frequency (upper): _________ 2) Midband gain: _________ 3) -3dB frequency with feedback: _________ 4) Midband gain with feedback: _________ 5) Bandwidth with feedback: _________ �!�"# = 200� − 6 $ %! �&�"# = 150� − 6 $ %! �'! = �'& = 0.5�, V() * = 10 % +, V(- * = 8 % +, �,.! = 0.25�� 7) If Vov=0.25V for all transistors, find a) Vinmin: _________ b) Vinmax: _________ c) Voutmin: _________ d) Voutmin: ___

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