Pulse and Digital Circuits Mid - II, November - 2014

1.The most important application of a time-base generator is in
  • TVs
  • Radar displays
  • CROs
  • time measurements
Answer: C
2.To get a saw-tooth or ramp output waveform, the restoration time must be
  • Zero
  • infinity
  • small
  • large
Answer: A
3.A circuit which generates non sinusoidal waveforms is called a
  • Relaxation oscillator
  • square wave generator
  • non-sinusoidal oscillator
  • none
Answer: A
4.In a bootstrap sweep circuit the amplifier gain A should be
  • Infinite
  • Finite
  • unity
  • Zero
Answer: C
5.A divider circuit with a division factor n can be built by making
  • T< nTp
  • T= nTp
  • T0 > nTp
  • T0 ≠ nTp
Answer: C
6.A chopper amplifier is used to amplify signals of the order of
  • micro volts
  • milli volts
  • volts
  • hundreds of volts
Answer: B
7.The advantage of bidirectional gate over unidirectional gate is
  • Linearity of operation
  • efficiency
  • non linearity
  • cost
Answer: A
8.When two generators produce waveforms at different frequencies, it is essential for proper synchronization that the frequency of one generator is an ……………… of that of the other.
  • Integral multiple
  • derivative
  • integral
  • additive
Answer: A
9.In TTL positive logic system, logic 0 and logic 1 are respectively
  • 0V and +5V
  • 0V and -5V
  • +5V and 0V
  • -5V and 0V
Answer: A
10.…………………
  • gate is an equality detector.
  • OR
  • AND
  • X-OR
Answer: D
11.………………… may be used to improve the linearity of Miller and bootstrap circuits.
Answer: Compensating networks
12.The ratio of the difference between the input and the output to the input at the end of the sweep is called the …………………
Answer: Transmission error
13.A …………………… is an electronic circuit which generates an output voltage or current waveform.
Answer: Time base generator
14.The several factors which affect the phase delay give rise to ………………….
Answer: Phase jitter
15.A ………………… is basically a transmission circuit which allows an input signal to pass through it during a selected time interval and blocks its passage outside that time interval.
Answer: Sampling gate
16.…………… is the base voltage in the output on which the input signal is superimposed.
Answer: Pedestal
17.The interval of time of transmission of a signal is selected by means of an externally applied signal termed as …………………
Answer: Gating signal
18.When discrete gates are realized using only resistors and transistors, it is called ……………
Answer: Resistor transistor logic
19.A ………………… gives all the possible combinations of the inputs and the corresponding outputs.
Answer: Truth table
20.The interconnection of gates to perform a variety of logical operations is called …………
Answer: Logic design