9780199339136, Chapter 1, Problem 48P

Prévia do material em texto

Chapter Problem 48P Step-by solution Step of 13 S-A-B-L Consider diagram shown Figure + Amplifier A Amplifier Figure Calculate voltage Substitute for and 100k 100k Therefore the value voltage Calculate voltage Substitute 100 V/V for for R., and 10k =(0.5) 20k =(0.5) =0.25 V Therefore the value voltage 0.25 V Calculate output voltage Substitute 10 V/V for for R, and 100 100+1k 100 =(2.5) =(2.5)(0.091) Therefore the value the output voltage 227.5 mV Calculate value of the voltage gain Substitute mV for and for Therefore value gain 22.75 V/V Calculate the value of voltage gain decibels Substitute Therefore the value 27.14 dB Step 7 of 13 S-B-A-L Consider circuit diagram shown Figure 2 Amplifier B Amplifier A Calculate the value of voltage Substitute for for and 10k 110k = =0.91 mV Therefore the value voltage 0.91 mV Step Calculate the value of voltage Substitute 10 V/V for and 1011 m)(0.99) Therefore the value of the voltage 9.01 mV Step 11 of 13 Calculate value of the output voltage Substitute 100 V/V for 9.01 mV for for and for 100 100 10.1k =8.92 mV Therefore the value the output voltage 8.92 mV Step Calculate voltage Substitute 8.92 mV and for 4, Therefore the value of the voltage gain 0.892 V/V Step Calculate value of the voltage gain decibels Substitute 0.892 20log(0.892) Therefore the value of t voltage Compare gains of the two cases S-A-B-L arrangement the best since the its higher arrangement