Assume that the output of the DAC in Figure 11-7(a) is connected to the op-amp of Figure

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Assume that the output of the DAC in Figure 11-7(a) is connected to the op-amp of Figure 11-7(b).

(a) With VREF = 5 V, R = 20 kΩ, and RF = 10 k, determine the step size and the full-scale voltage at VOUT.

(b) Change the value of RF so that the full-scale voltage at VOUT is –2 V.

(c) Use this new value of RF, and determine the proportionality factor, K, in the relationship VOUT = K(VREF × B). (B is the binary input value.)


Figure 11-7

+VREF switch closed when input bit = 1 R MSB B3 lOUT N15  OV 2 R 814  + B B Binary inputs (0 or 1) (a) www.

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Digital Systems Principles And Application

ISBN: 9780134220130

12th Edition

Authors: Ronald Tocci, Neal Widmer, Gregory Moss

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