fmixss
  • 1. In a time domain plot, the horizontal axis is a measure of
A) Frequency
B) Time
C) Peak amplitude
D) Wave length
  • 2. The number of bits required to store, or transmit, 1 s of that signal.
A) Bps
B) Bit rate
C) Digital signal
D) Baud rate
  • 3. It combines multiple simple signals into a single, more complex signal.
A) No answer
B) Harmonic
C) Composite signal
D) Waveforms
  • 4. What is the bit rate of a signal in which 10 bit last 2 picoseconds?
A) 5 gigabits
B) 5 petabits
C) 5 terabits
  • 5. Has the function of amplifying and switching electrical signals.
A) Transistor
B) Diode
C) Composite signals
  • 6. Which of the following can be determined from a frequency-domain graph of a signal?
A) Time
B) Power
C) Bandwidth
D) Phase
  • 7. What is the bandwidth of a signal that ranges from 40kHz to 4MHz?
A) 396kHz
B) 360MHz
C) 3.96MHz
  • 8. is a type of transmission impairment in which the signal loses strength due to the resistance of the transmission medium.
A) Capture effect
B) Attenuation
C) Crosstalk
  • 9. A is a two-terminal electronic component that conducts electric current.
A) Diode
B) Ics
C) Composite signal
  • 10. This part involves the conversion of an electronic signal into a physical form that can be perceived by the device.
A) Input transducer
B) Output transducer
C) Encoder
  • 11. A measurement of where a wave is in its cycle, relative to a reference point.
A) No answer
B) Phase
C) Wavelength
  • 12. A sine wave is
A) Periodic and continuous
B) Kapagod yan
C) Periodic and discrete
  • 13. This is the midway component in the system that helps to pass the signal from the transmitter end to the receiver end.
A) User
B) Sender
C) Channel
  • 14. The branch of science and engineering that deals with the study and application of devices and systems that control the flow of electrons, primarily for information processing and control.
A) Physics
B) Biometrics
C) Electronics
  • 15. A/An_is a type of electronic test instrument that graphically displays varying voltages of one or more signals as a function of time.
A) Oscilloscope
B) Transponder
C) Amplifier
  • 16. A compact assembly of electronic circuits formed from various electronic components such as transistors, resistors, and capacitors and their interconnections.
A) Transducer
B) Amplifier
C) ICs
  • 17. The process of encoding a signal using its amplitude, frequency, or phase is known as.
A) Analog modulation
B) Digital modulation
C) Bahala ka
  • 18. The_____ has units of bits/second
A) Yes
B) Throughout
C) No
  • 19. As frequency increases, the period_____
A) Increases
B) Both?
C) Decreases
  • 20. What is the bit rate of a signal in which 1 bit last 2 milliseconds?
A) 50bits
B) 500bits
C) 5000bits
  • 21. Data is transferred in bits.
A) PSK
B) Choose wisely
C) ASK
  • 22. It uses analog signals for data transmission.
A) Digital modulation
B) Analog modulation
C) Bahala ka
  • 23. The___ has units of seconds.
A) Period
B) Frequent
C) Throughout
  • 24. A type of harmonic wave that moves in a periodic manner.
A) Frequency
B) Digital signal
C) Sine wave
  • 25. Is a type of transmission impairment in which an outside source such as crosstalk that corrupts a signal.
A) Noise
B) Reflection
C) Distortion
  • 26. is a type of a transmission impairment in which the signal loses strength due to the different propagation speeds of each frequency that makes up the signal.
A) Decibel
B) Distortion
C) Crosstalk
  • 27. In a frequency-domain plot, the vertical axis measures the
A) Wavelength
B) Peak amplitude
C) Phase
  • 28. A device that converts a physical phenomenon (like sound, light, temperature, etc.) into an electrical signal.
A) Transducer
B) Amplifier
C) Channel
  • 29. What is the duration of 1 bit for a signal with a bit rate of 5 Mbps?
A) 0.002 seconds
B) 0.000002 milliseconds
C) 0.000002 seconds
  • 30. What is the duration of 1 bit for a signal with a bit rate of 100 bps?
A) 0.001 seconds
B) 0.01 milliseconds
C) 0.01 seconds
  • 31. Which of the following configurations provides phase inversion?
A) differential amplifier
B) non-inverting amplifier
C) voltage follower
D) inverting amplifier
  • 32. The sampling theorem is also known as
A) Nyquist theorem
B) Fourier theorem
C) Ohm's law
D) Kirchhoff's theorem
  • 33. The disadvantage of flash ADCs is
A) slow operation
B) high quantization error
C) large number of comparators required
D) low accuracy
  • 34. The process of converting an analog signal into a digital signal is called
A) analog-to-digital Conversion
B) digital-to-analog Conversion
C) demodulation
D) modulation
  • 35. Quantization in ADC means
A) converting each sample into discrete amplitude levels
B) filtering the analog signal
C) encoding binary data
D) sampling the signal in time
  • 36. Which op-amp circuit provides difference between two input voltages?
A) integrator
B) summing amplifier
C) differential amplifier
D) comparator
  • 37. The main advantage of a flash ADC is
A) simplicity
B) very high speed
C) low power consumption
D) low cost
  • 38. The purpose of a sample-and-hold circuit in ADC is to
A) remove high-frequency noise
B) generate clock pulses
C) hold the input signal constant during conversion
D) remove high-frequency noise
  • 39. A successive approximation ADC works by
A) counting clock pulses during conversion
B) comparing input voltage with reference voltages step-by-step
C) sampling only at zero crossings
D) integrating input voltage over time
  • 40. The step size in an ADC determines
A) output current
B) sampling frequency
C) quantization error
D) resolution speed
  • 41. Sampling involves
A) filtering unwanted frequencies
B) dividing the signal into equal voltage levels
C) taking discrete time samples of a continuous signal
D) converting binary to decimal
  • 42. The ideal operational amplifier has which of the following characteristics?
A) both input and output impedances are infinite
B) both input and output impedances are zero
C) zero input impedance and infinite output impedance
D) infinite input impedance and zero output impedance
  • 43. Which terminal of the op-amp is marked with a minus (-) sign?
A) ground terminal
B) non-inverting input
C) inverting input
D) output terminal
  • 44. The ADC output is in
A) current form
B) binary form
C) analog voltage
D) sinusoidal waveform
  • 45. The symbol "+" on an op-amp indicates:
A) the positive output voltage
B) the non-inverting input terminal
C) the feedback terminal
D) the positive supply voltage
  • 46. Common-mode rejection ratio (CMRR) of an op-amp should ideally be
A) very high
B) Zero
C) one
D) very small
  • 47. The purpose of negative feedback in an op-amp is to
A) reduce bandwidth
B) reduce distortion and stabilize gain
C) increase gain
D) increase input impedance
  • 48. Quantization error is the
A) difference between actual and quantized value
B) sum of all sampled values
C) ratio of signal to noise
D) sampling frequency error
  • 49. According to the Nyquist theorem, the sampling rate must be at least
A) half the signal frequency
B) four times the signal frequency
C) twice the highest signal frequency
D) equal to the signal frequency
  • 50. The first step in analog-to-digital conversion.
A) encoding
B) filtering
C) sampling
D) quantization
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