2 Micro-cap III Spectrum Software STD 54 NPN 16,23,0,2,1,2,3,Q1 Resistor 16,23,3,1,2,4,R1 Resistor 16,29,3,1,0,2,R2 Resistor 19,14,1,1,4,1,R3 Resistor 19,26,1,1,3,0,R4 Capacitor 24,32,5,1,0,3,C2 Capacitor 13,23,6,1,2,5,C1 Short3 16,23,6,-1, Short5 24,26,6,-1, Short5 24,32,6,-1, Capacitor 27,20,2,1,6,1,C3 NPN 37,20,0,2,7,6,8,Q2 Resistor 37,20,3,1,6,4,R5 Resistor 37,26,3,1,0,6,R6 Resistor 40,11,1,1,4,7,R7 Resistor 40,23,1,1,8,0,R8 Capacitor 45,29,5,1,0,8,C5 Capacitor 29,20,1,1,6,0,C4 Short5 45,23,6,-1, Short5 45,29,6,-1, Ground 29,26,7,-1, Short2 27,20,0,-1, Short2 19,20,0,-1, Short6 37,20,6,-1, Short2 29,20,0,-1, Short3 16,29,7,-1, Short3 16,32,0,-1, Ground 19,32,7,-1, Short3 37,29,0,-1, Short3 37,26,1,-1, Ground 40,29,7,-1, Short6 46,17,6,-1, Capacitor 47,17,7,1,7,0,C6 Ground 50,23,7,-1, Diode 53,17,7,1,7,0,Z1 Short6 53,23,6,-1, Short6 53,17,6,-1, Short1 46,17,4,-1, Inductor 7,29,5,1,0,5,L1 Ground 7,29,7,-1, Battery 3,11,0,1,0,4,12 V Short12 28,11,4,-1, Short12 16,11,4,-1, Short3 37,11,1,-1, Short3 19,11,1,-1, Short6 16,11,7,-1, Ground 3,11,7,-1, Capacitor 9,11,7,1,4,0,C7 Ground 9,17,7,-1, Short6 9,11,0,-1, Short1 15,11,4,-1, Short1 15,11,4,-1, Short1 15,11,4,-1, Short2 53,17,0,-1, 0 11 15,4,-1,Magnetic stripe reader amplifier 29,6,-1,by 16,8,-1,L. Padilla (1997) 55,17,7,Output 1,37,-1,R1 = 68 k, R2 = 10 k, R3 = 22 k, R4 = 2.2 k 1,39,-1,R5 = 8.2 k, R6 = 1 k, R7 = 2.2 k, R8 = 47 1,41,-1,C1 = 22 uF, C2 = 10 uF, C3 = 47 uF, C4 = 22 nF 1,43,-1,C5 = 150 uF, C6 = 22 nF, C7 = 2200 uF (16 V) 1,47,-1,Z1 = Zener diode with breakdown voltage around 6 V 1,45,-1,L1 = Magnetic head 1,49,-1,Q1, Q2 = Any bipolar silicon NPN general purpose transistor 7 12 7 5 10 3 0 3 0 0 5 3 48,3,51,51 0 0 0 0 0