4–57 On a quiz, an instructor asked the students to draw a circuit that would realize the block diagram shown in Figure P4–57.

(a) One student drew the circuit shown in Figure P4–57.

(b) The instructor noted three problems with the student’s design. Find the problems and correct them.

Transcribed Image Text:

's-2 + -1 100 50 w 50 w (a) 3 +vo (b) FIGURE P4-57 + vo 100 200