The resistors in the difference amplifier shown in Fig.
Chapter 5, Problem 5.27(choose chapter or problem)
The resistors in the difference amplifier shown in Fig. 5.15 are R = 24 k, Rb = 75 k, Rc = 130 k and Rd = 120 k. The signal voltages v and vb are 8 and 5 V, respectively, and Vcc = 20V a) Find b) What is the resistance seen by the signal source ? c) What is the resistance seen by the signal source vb ?
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