Operational Amplifiers Questions

• The inverting input is pin 2.
• A voltage-follower op-amp has the output connected directly to the inverting input.
• This circuit is a bandpass filter.
• The voltage gain of the amplifier in the given circuit would increase if ______.
• The common-mode rejection ratio (CMMR) is the ratio of _____ to ______.
• The input voltage must be ______ in the given circuit to obtain the given output voltage.
• The Q of a crystal _________.
• ______ is NOT a characteristic of an ideal op-amp.
• Common-mode signals have _____.
• Current cannot flow to ground through a(n) ________.
• The voltage required to force the differential output to zero is called _______.
• The input impedance is ______ for the amplifier in the given circuit. The data sheet values are Zin = 3 MΩ, Zout = 80 Ω, and Aol = 250,000.
• An op-amp circuit in which the output voltage is equal to the difference between the two input voltages is called a(n) _____
• A virtual ground is a(n) ______ ground because this point is at zero volts.
• The voltage gain is ______ for the amplifier in the given circuit.
• The given circuit is ___.
• The resistors Rf and Ri in an op-amp circuit control ______ .
• The 555 timer can be connected to operate a(n) ___________.
• An oscillator whose frequency can be controlled by an input "control voltage" is called a(n) ______ .
• A ______ is not a multivibrator.