
268 Circuit calculations pocket book
10 PRINT "PROG 234"
20 PRINT "COMMON EMITTER D.C. CONDITIONS"
30 INPUT "ENTER APPLIED VOLTAGE IN VOLTS" ; VCC
40 INPUT "ENTER BASE-EMITTER VOLTAGE" ; VBE
50 INPUT "ENTER BASE CURRENT IN MICROAMPS" : IB
60 INPUT "ENTER COLLECTOR CURRENT IN MILLIAMPS" : IC
70 INPUT "ENTER EMITTER RESISTOR" ; RE
80 LET IE=(IC/10~3)+(IB/10~6)
90 LET VE=IE*RE
100 LET VR2=VE+VBE
110 LET R2=VR2*10"6/(4*1B)
120 LET VR1=VCC-VR2
130 LET Hl=VHl*10-6/(5*IB)
140 PRINT "Rl= " Rl "OHMS'
150 PRINT "R2= " R2 "OHMS"
Example 5 Figures 15.7 and 15.8 respectively show the input and
output characteristics for the transistor used in the amplifie ...