Chapter Questions
What is the typical open-loop gain of a 741 op amp at very low frequencies?
The dc open-loop gain of an op amp is 100,000 . Find the open-loop gain at its break frequency.
The transient response rise time (unity gain) of an op amp is $0.07 \mu \mathrm{s}$. Find the small-signal bandwidth.
An op amp has a small signal unity-gain bandwidth of $2 \mathrm{MHz}$. Find its open-loop gain at $200 \mathrm{kHz}$.
What is the difference between the open-loop and closed-loop gain of an op amp?
What is the open-loop gain for the op amp of Problem $10-4$ at $2 \mathrm{MHz}$ ?
What is rise time?
An op amp has a dc open-loop gain of 100,000 . It is used in an inverting amplifier circuit with $R_f=100 \mathrm{k} \Omega, R_i=10 \mathrm{k} \Omega$. Find the actual dc closed-loop gain.
The op amp of Problem 10-8 is used in a noninverting amplifier with the same $R_f$ and $R_i$. Find the amplifier's actual de closed-loop gain.
What is the small-signal bandwidth of the op amp whose frequency response is given in Fig. $10-1$ ?
The unity-gain bandwidth of an op amp is $10 \mathrm{MHz}$. It is used to make a noninverting amplifier with an ideal closed-loop gain of 100 . Find the amplifier's (a) small-signal bandwidth; (b) $A_{C L}$ at $f_H$.
How fast can the output of an op amp change by $10 \mathrm{~V}$ if its slew rate is $1 \mathrm{~V} / \mu$ s?
Find the maximum frequency for a sine-wave output voltage of $10-\mathrm{V}$ peak with an op amp whose slew rate is $1 \mathrm{~V} / \mathrm{hs}$.
Find the noise gain for an inverting amplifier with a gain of $R_f / R_i=-10$.
What is the noise gain for a five-input inverting adder?
The op amp in Example $10-9$ is changed to one with a slew rate of $1 \mathrm{~V} / \mu \mathrm{s}$. Find its maximum full-power output frequency. Assume that $V_{\rho \text { mex }}=10 \cdot \mathrm{V}$ peak.
Use the Internet and compare the slew rate of an OP-177 op amp with a MAX4281.