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Mixed Quiz
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1One advantage of the inverting op amp is that its voltage gain equals the ratio of the feedback resistance to the input resistance.
A)True
B)False


2A dc-coupled amplifier needs a frequency response down to zero hertz.
A)True
B)False


3A voltage divider is a circuit that produces an extremely accurate and stable output voltage.
A)True
B)False


4When an input signal drives both inputs of an op amp, both inverting and noninverting amplification results and the output is the sum of two amplified signals.
A)True
B)False


5The total voltage gain with an input driving both sides of an op amp equals the voltage gain of the inverting channel plus the voltage gain of the noninverting channel.
A)True
B)False


6The voltage gain of a circuit known as a sign changer can be varied from −1 to 10.
A)True
B)False


7The reversible and adjustable gain op amp circuit is the type of circuit that can not be easily configured using discrete components.
A)True
B)False


8One of the most important characteristics of a BJT amplifier is its CMRR.
A)True
B)False


9For a 741C op amp, the minimum CMRR is 20 dB at low frequencies.
A)True
B)False


10The output of a op amp circuit has the same shape as the input signal.


11Using a capacitor in an ac-coupled noninverting op amp minimizes the output offset voltage.


12A device that converts a nonelectrical quantity into an electrical quantity is an input .


13The characteristics of a(n) amplifier does not include low input impedance.


14A monolithic instrumentation amplifier typically has a CMRR of over .


15A circuit that subtracts two input voltages to produce an output voltage equal to the difference of the two input signals is called a .


16A converter takes a binary represented value and converts it into a voltage or current.


17One of the most important characteristics of a differential amplifier is its .


18Differential inputs often use a first stage of two voltage followers in order to
A)provide more voltage gain
B)reduce input resistance
C)buffer the inputs
D)directly connect the inputs


19The process of minimizing the effects of leakage current and cable capacitance by bootstrapping the shield to the common-mode potential is called
A)laser trimming
B)booting capacitance
C)buffering
D)guard driving


20When the input and output voltages of an op amp can swing all the way to the positive or negative supply voltages, what condition results?
A)floating load
B)guard driving
C)rail-to-rail operation
D)laser trimming


21In order to provide a smoother transition between the output steps produced by a D/A converter, what circuit is typically connected to the output?
A)current booster
B)floating load
C)high-pass filter
D)low-pass filter


22The output of a linear op amp circuit
A)is always nonlinear
B)is distorted due to saturation
C)has the same shape as the input signal
D)is always digital


23When an input signal drives both inputs of an op amp, both inverting and noninverting amplification occur at the same time and the output is the
A)sum of the two amplified signals
B)product of the two amplified signals
C)Thevenin’s voltage of the two amplified signals
D)superposition of the two amplified signals


24Which op amp circuit produces an output voltage with the same magnitude as the input voltage, but with a phase angle that can be varied continuously between 0° and −180°?
A)inverter
B)converter
C)phase shifter
D)comparator


25In order to have high CMRR and offsets, what type op amp is required when building an instrumentation amplifier?
A)741C
B)precision
C)standard
D)linear





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