Convert the amplifier circuit of Fig. 5-11 into a noninverting configuration and assume the same conditions as

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Convert the amplifier circuit of Fig. 5-11 into a noninverting configuration and assume the same conditions as specified in Example 5.27 with v1(t) as the input, v2(t) as the output, Ri = ∞, Ro = 0, k = 1 + R2/R1, and the op amp model specified by Example 5.26.

(a) Find the circuit’s input-output relationship in the time domain.

(b) Let v1(t) = V1 cos 2π ft produce an output v2(t) = V2 cos(2π ft − θ). Develop an expression for magnitude gain |V2/V1| vs. frequency. 

(c) Verify that the gain-bandwidth product of the noninverting amplifier circuit is the same as that of the op amp’s open-loop, a0 f0.

Data from Figure 5-11

2/1 R B V A V R wi R A (ut-u) 22 R

Data from Example 5.27

In the inverting amplifier circuit of Fig. 5-11, v1(t) is the input and v2(t) is the output. Let Ri = ∞, Ro = 0, and assume the 741 op amp model specified by Example 5.26.

At low frequencies the magnitude open-loop gain of a 741 op amp varies as||A|= q J1+ff)?


where typically a0 = 200,000 and f0 = 5 Hz.

Data from Example 5.26

At low frequencies the magnitude open-loop gain of a 741 op amp varies as

|A| = | | |- ao 1+ (flif)

where typically a0 = 200,000 and f0 = 5 Hz.

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Schaum S Outline Of Electric Circuits

ISBN: 9781260011968

7th Edition

Authors: Mahmood Nahvi, Joseph Edminister

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