Special Purpose Op Amp Circuits » Exercise – 1
1. An OTA has
(a) a bias-current input terminal.
(b) high output impedance.
(c) no fixed open-loop voltage gain.
(d) all of the above
2. Instrumentation amplifiers are normally used to measure
(a) small differential signal voltages.
(b) signals superimposed on a common-mode voltage often much larger than the signal voltage.
(c) both of the above
(d) none of the above
3. Refer to given circuits. Which circuit is known as an OTA?
4. Refer to given circuits. Which circuit is known as a current-to-voltage converter?
5. A(n) ________ amplifier provides “a barrier” between the input and output for the protection of human life or sensitive equipment.
(c) operational transconductance
- Special Purpose Op Amp Circuits » Exercise - 2 51. An instrumentation amplifier has extremely high ________, good ________, and high ________. (a) input impedance, common-mode rejection, gain (b) noise factor, grounding, power (c) working voltages, current capacity, output impedance (d) output gain, output loading, power 52. A voltage-to-current converter is used in applications where it's necessary to have an output load current that is controlled by _________. (a) input frequency (b) output resistance (c) input voltage (d) input resistance 53. If an operational transconductance amplifier (OTA) is used as an amplitude modulator, the voltage gain is varied by applying a _________ voltage to the ______ input. (a) demodulation, bias (b) modulation, bias (c) bias, modulation (d) low-frequency, bias