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What is the gain of this amplifier?. +10 -10 +11 -11 +0.1. 100k. V in. V out. 10k. Describe the frequency dependence of this amplifier, assuming the op-amp is dominant pole compensated. its l ike an RC high-pass filter l ike an RC low-pass filter independent of frequency out to f T

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  1. What is the gain of this amplifier? • +10 • -10 • +11 • -11 • +0.1 100k Vin Vout 10k

  2. Describe the frequency dependence of this amplifier, assuming the op-amp is dominant pole compensated. • its like an RC high-pass filter • like an RC low-pass filter • independent of frequency out to fT • it has a gain of 2 • it has a gain of 3 Vin 20k Vout 10k

  3. Suppose the unity gain frequency of the op-amp in this circuit is 20 MHz.What is the 3dB frequency of the amplifier? • 200 MHz • 20 MHz • 220 MHz • 110 kHz • 1.8 MHz 100k Vin Vout 10k

  4. Why not replace this circuit with an RC low-pass filter? • Good idea. The RC filter would be cheaper and more reliable. • No, this circuit has gain • Good idea. The RC filter uses less power. • Depends on how you plan to drive the circuit • Depends of what the circuit • will drive Vin 10k Vout 10k

  5. H3 What is the gain? • -0.5 • -2 • 3 • -0.333 • This circuit won’t work 10k 20k Vin Vout

  6. H3 What is the bandwidth of this circuit if the op-amp fT is 100 MHz? • 10 MHz • 1 MHz • 100 MHz • 10 kHz • This circuit won’t work 1M 10k Vin Vout

  7. H3 What is the input impedance of this circuit at low frequencies? • Very small, depends on A of op-amp • Close to 100k • Very large, depends on A of op-amp • Close to 10k • Cannot be determined 100k 10k Vin Vout

  8. H3 What is the output impedance of this circuit at low frequencies? • Very small, depends on A of op-amp • Close to 100k • Very large, depends on A of op-amp • Close to 10k • Cannot be determined 100k 10k Vin Vout

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