Eletronics-Operational Amplifiers
Eletronics-Operational Amplifiers
1. An ideal operational amplifier has
- infinite output impedance
- zero input impedance
- infinite bandwidth
- All of the above
2. Another name for a unity gain amplifier is:
- difference amplifier
- comparator
- single ended
- voltage follower
3. The open-loop voltage gain (Aol) of an op-amp is the
- external voltage gain the device is capable of
- internal voltage gain the device is capable of
- most controlled parameter
- same as Acl
4. A series dissipative regulator is an example of a:
- linear regulator
- switching regulator
- shunt regulator
- dc-to-dc converter
5. A noninverting closed-loop op-amp circuit generally has a gain factor:
- less than one
- greater than one
- of zero
- equal to one
6. In order for an output to swing above and below a zero reference, the op-amp circuit requires:
- a resistive feedback network
- zero offset
- a wide bandwidth
- a negative and positive supply
7. If ground is applied to the (+) terminal of an inverting op-amp, the (–) terminal will:
- not need an input resistor
- be virtual ground
- have high reverse current
- not invert the signal
8. An astable multivibrator is also known as a:
- one-shot multivibrator
- free-running multivibrator
- bistable multivibrator
- monostable multivibrator
9. With negative feedback, the returning signal:
- aids the input signal
- is proportional to output current
- opposes the input signal
- is proportional to differential voltage gain
10. What starts a free-running multivibrator?
- a trigger
- an input signal
- an external circuit
- nothing