Digital Electronics And Logic Design Set 7
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This set of Digital Electronics and Logic Design Multiple Choice Questions & Answers (MCQs) focuses on Digital Electronics And Logic Design Set 7
Q1 | Which of the following is the fastest logic
- ttl
- ecl
- cmos
- lsi
Q2 | The digital logic family which has the lowest propagation delay time is
- ecl
- ttl
- cmos
- pmos
Q3 | Which TTL logic gate is used for wired ANDing
- open collector output
- totem pole
- tri state output
- ecl gates
Q4 | CMOS circuits consume power
- equal to ttl
- less than ttl
- twice of ttl
- thrice of ttl
Q5 | In a positive logic system, logic state 1 corresponds to
- positive voltage
- higher voltage level
- zero voltage level
- lower voltage level
Q6 | The commercially available 8-input multiplexer integrated circuit in the TTL family is
- 7495
- 74153
- 74154
- 74151
Q7 | The logic 0 level of a CMOS logic device is approximately
- 1.2 volts
- 0.4 volts
- 0volts
- 5volts
Q8 | Which ofthe following is a universal logic gate?
- or
- xor
- and
- nand
Q9 | How is the noise margin of a logic family defi ned?
- voh – vol
- greater of vdd – vohand vol – gnd
- smaller of vil – voland voh – vih
- vih – vil.
Q10 | What parameter causes the main limit on fan-out of CMOS logic in high-speed applications?
- d.c. input current
- output current
- input capacitance
- power supply voltage.
Q11 | The number of standard loads that the output of the gate can drive with out impairment of its normal operation is
- fan-in
- fan-out
- noise-margin
- power- dissipiatio n
Q12 | Measure of power consumed by the gate when fully driven by all its inputs is
- fan-in
- fan-out
- noise-margin
- power- dissipiatio n
Q13 | Fan-out is specified in terms of
- voltage
- current
- watt
- unit load
Q14 | Which of the following logic family has highest fan-out
- dtl
- cmos
- rtl
- ttl
Q15 | Which of following consume minimum power
- ttl
- rtl
- dtl
- cmos
Q16 | Among the logic families, low power dissipation is in
- dtl
- cmos
- rtl
- ttl
Q17 | The temperature in which the performance of the IC is effective
- operating
- fan-out
- normal
- power-
Q18 | The nominal value of the dc supply voltage for TTL (transistor-transistorlogic) devices is
- 0v
- 5v
- 10v
- 15v
Q19 | The average transition delay time for the signal to propagate from input to output when the signals change in value. It is expressed in ns is
- propogation delay
- fan-out
- noise-margin
- power- dissipiatio n
Q20 | the number of inputs connected to the gate without any degradation in the
- propogation delay
- fan-out
- fan- in
- power- dissipiatio
Q21 | Which of the following logic gives the complementary outputs?
- ecl
- ttl
- cmos
- pmos
Q22 | The maximum noise voltage added to an input signal of a digital circuit
- fan-in
- fan-out
- noise-margin
- power-
Q23 | Among the logic families, Slowest logic family is
- ttl
- rtl
- dtl
- cmos
Q24 | Operating temperature of the IC vary from
- 0 to70 celsius
- 0to35celsius
- 0to 50celsius
- 0to70celsi
Q25 | 1. Open collector output 2. Totem-Pole Output 3. Tri-state output are thetype of
- ttl logic
- rtl logic
- cmos logic
- none ofthis