Pulse and Digital Circuits Mid - II, April - 2011

1.The time during which the waveform returns to the initial value is called:
  • fall time
  • flyback time
  • rise time
  • delay time
Answer: B
2.The circuit which require an amplifier whose gain is nearly infinity
  • Boot strap ckt
  • Miller ckt
  • Phantastron ckt
  • Inductor ckt
Answer: B
3.When generators with equal frequencies run in synchronism ,the synchronization is said to be on a
  • one-to-one basis
  • one-to-two basis
  • two-to-one basis
  • one-to-four basis
Answer: A
4.A Transmission circuit which allows an input Signal to pass through it during a selected interval and blocks it passage outside this time interval is called :
  • sampling gates
  • conventional gates
  • non-conventional gates
  • logic gates
Answer: A
5.In unidirectional sampling gate the combination of RC forms a
  • Differentiator
  • Integrator
  • Coupling elements
  • Multivibrator
Answer: B
6.The ratio of maximum deviation to the sweep amplitude is called
  • slope error
  • displacement error
  • Transmission error
  • Linear error
Answer: B
7.A capacitor is charged linearly from a constant current source is used to generate
  • sine wave form
  • pulse wave form
  • time base waveform
  • trapezoidal wave form
Answer: C
8.The several factors which affect phase delay given rise to
  • phase jitter
  • amplitude jitter
  • both amplitude and phase jitter
  • frequency jitter
Answer: A
9.The interval of time is selected by means of an externally applied signal termed as:
  • transient signal
  • gating signal
  • output signal
  • exponential signal
Answer: B
10.Logic gates are the basic elements that make a
  • analog system
  • gating system
  • basic system
  • digital system
Answer: D
11.The maximum number of gates that can be driven by any logic gate is called __________
Answer: Fan out
12.If synchronization is achieved with different frequencies, i.e one frequency being n times the other, then it is termed-----------------------
Answer: synchronization with frequency division
13.Two or more generators are said to be running _______________ if all of them arrive at some point in the cycle at exactly the same instant of time.
Answer: Synchronously
14._____________gates are used in chopper amplifiers
Answer: Sampling
15.In ____________logic system, the higher of the two voltage levels represent logic 1 and lower logic is 0
Answer: positive
16.A _____________________ is one that provides an output voltage waveform a portion of which exhibits a linear portion with time
Answer: voltage time base generator
17.The ratio of the difference in slope at beginning and end of the sweep to initial value of slope is called ________
Answer: slope error or sweep speed error
18.Sampling gates are classified into___________types
Answer: 2
19.Chopper often called as __________
Answer: modulator
20.A positive logic NOR gate is equivalent to negative logic ________gate
Answer: NAND