33) These waveforms are applied to a gated D latch, which is initially RESET. Wh

Question

33) These waveforms are applied to a gated D latch, which is initially RESET. Which of the areas 33) identified on the Q waveform is incorrect? A) Area a B) Area b C) Area c D) Area d 34) Flip-flops are normally used for all of the following applications, except A) frequency division C) data storage B) counting D) logic gates 35) A d-K flip-flop is being used as a divide-by-2 circuit when 35) A) the J and K inputs are tied to Vcc C) the reset is tied to the clock B) the Jand K inputs are tied to ground D) all the inputs are connected to the preset 36) A one-shot is classified as a(n) 36 A) one-pulse multivibrator C) bistable multivibrator B) astable multivibrator D) monostable multivibrator 37) A retriggerable one-shot has a pulse width of 10 ms. Three milliseconds (3 ms) after being 37 triggered, another trigger puise is applied. The duration of the resulting output pulse will be ms. B) 10 C) 3 D) 13 38) 38) An astable multivibrator is a circuit that A) has two stable states C) produces a continuous output signal B) has one stable state D) Both B and C are correct 39) A push-button switch is used to input data to a register. The output of the register is erratic. which 39) of the following could be the cause of the problem? A) The switch contacts are bounçing. B) The socket contacts on the register IC are corroded. C) The power supply is probably noisy D).The register IC is intermittent and failure is imminent 40) A positive edge-triggered J-K flip-flop is used to produce a two-phase clock. However, when the circuit is operated it produces erratic results. Close examination presence of glitches. What might be the source of these glitches? ith an oscilloscope reveals the A) A race condition exists between the CLOCK and the outputs of the flp-flop feeding the AND gate. B) A race condition exists between the J and K inputs C) A race condition exists between the Q and Q outputs to the AND gate D) The PRESET and CLEAR terminals may have been left floating

Explanation / Answer

33) C

explanation: From the above graphs we can tell that area c is the incorrect and the output is not correct in the c area

34) d

explanation: we can use j-k flip flop as counting ,data storage,frequency divisio but not realize the logic gates using j-k flipflops

35) a

explanation:when j-k flip flop is used as divided by 2 circuit the inputs j and k are should tied to logic 1(vcc)

36) d

explanation:one shot is classified as monostable multiplier

37) d

38) c (produces a continuous output signal)

Explanation: astable multivibrator output changes continuously betwen two changes

39) a (the switch contacts are bouncing)

Explantion: due to bouncing of switch contacts the outputs may changes multiple times

40) a

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