A timing circuit is required that feeds into an OP AMP’s non-inverting terminal (i.e. draws no current.) The circuit’s output response vO(t) must be vOðtÞ ¼ 5 1 e1000t uðtÞ V Figure P7–43 shows two commercial products and the vendors claim each will meet the requirement. Which will you select and why?

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5V 5V + + t=0 1 + vo(t) 1 F Vendor A Unit cost: $7.00 t=0 1 H m + 1 Vo(t) Vendor B FIGURE P7-43 Unit cost: $4.50