Operational Amplifiers Questions

• Input impedance [Zin(I)] of an inverting amplifier is approximately equal to:
• What is the output voltage?
• If ground is applied to the (+) terminal of an inverting op-amp, the (–) terminal will:
• If a noninverting amplifier has an RIN of 1000 ohms and an RFB of 2.5 kilohms, what is the RIN voltage when 1.42 mV is applied to the correct input?
• What is the difference between common-mode and differential-mode input signals?
• If the feedback/input resistor ratio of a feedback amplifier is 4.6 with 1.7 V applied to the noninverting input, what is the output voltage value?
• In an open-loop op-amp circuit, whenever the inverting input (–) is negative relative to the noninverting input (+), the output will:
• The ratio between differential gain and common-mode gain is called:
• A circuit whose output is proportional to the difference between the input signals is considered to be which type of amplifier?
• What is the output waveform of the circuit?
• If the input to a comparator is a sine wave, the output is a:
• A portion of the output that provides circuit stabilization is considered to be:
• An astable multivibrator is also known as a:
• The open-loop voltage gain (Aol) of an op-amp is the
• In a PLL, to obtain lock, the signal frequency must:
• The common-mode voltage gain is
• If an op-amp has one input grounded and the other input has a signal feed to it, then it is operating as what?
• Another name for a unity gain amplifier is:
• In order for an output to swing above and below a zero reference, the op-amp circuit requires:
• What three subcircuits does a phase locked loop (PLL) consist of?