Exam 12: The Operational Amplifier

Figure 5 The RC components shown represent internal R and C of a compensated op- amp. -Refer to Figure 5. Assume the input frequency is equal to the critical frequency. The phase shift is

The input offset voltage is defined as a differential input dc voltage that

The open- loop and closed- loop gains for a voltage follower equal 1.

The output impedance of an inverting amplifier is very small.

Figure 1 -Refer to Figure 1. The signal represents the output of a fast op- amp to a step input voltage. The slew rate for this op- amp is

Figure 4 Both op- amps are compensated and have A_OL = 100 dB and f_T = 2 MHz. -Refer to Figure 4(a). Assume the output is a 1.0 kHz square wave that goes between +Vmax and -V_max. This fault is likely due to an

The input offset current, IOS, is the

Figure 3 -Refer to Figure 3. As the closed- loop gain, ACL, increases, the

Figure 4 Both op- amps are compensated and have A_OL = 100 dB and f_T = 2 MHz. -Refer to Figure 4(a). The closed loop bandwidth, fc(cl), is

Figure 3 -Refer to Figure 3. With a constant input, the output ranges from

Assume an op- amp has bias currents of 10.0 µA and 10.2 µA. The input offset current is

The gain- bandwidth product for a compensated op- amp is a constant.

Figure 4 Both op- amps are compensated and have A_OL = 100 dB and f_T = 2 MHz. -Refer to Figure 4(b). The closed loop bandwidth, fc(cl), is

The common- mode gain, ACM, of an op- amp with AOL = 200,000 and a CMRR of 80 dB is

A CMRR of 110,000 is expressed in dB as

The input resistance of a BIFET is