61401. Is the propagation delay from the clock to the output for the 7476 the same as the delay from the set or reset to the output?
61402. What is the difference between setup time and hold time?
61403. Define a race condition for a flip-flop.
61404. Which of the following flip-flop timing parameters indicates the time it takes a Q output to respond to a Cp input?
61405. How much setup time (ts) is required for the 74LS76?
61406. Why should a LED be pulled LOW from a logic gate rather than pulled HIGH?
61407. What is the major advantage of the J-K flip-flop over the S-R flip-flop?
61408. Decoupling capacitors should be tied from VCC on one device to ground on a different device.
61409. One example for the use of a Schmitt trigger is as a(n):
61410. TTL requires a constant supply voltage of 8.0 V.
61411. A transfer function graph illustrates the most important specifications for the Schmitt trigger devices.
61412. The input levels to a flip-flop must be maintained for a minimum time period both before and after the edge of the clock signal is applied.
61413. There is no way to eliminate the effects of a switch bounce.
61414. Pull-up resistors and pull-down resistors are used to keep a floating terminal HIGH.
61415. The output of a phototransister is determined by the presence or absence of light at its base input.
61416. The term race condition describes the time that an active signal must be present at the input to a flip-flop before an active clock edge is applied.
61417. A Schmitt trigger has a positive feedback circuit and experiences a phenomenon called hysteresis.
61418. A series RC circuit can be used to generate a power-up (automatic) reset signal.
61419. The 7805 will get very hot if your circuit draws more than 0.5 A.
61420. The ________ circuit overcomes the problem of switching caused by jitter on the inputs.
61421. Why would a delay gate be needed for a digital circuit?
61422. An optocoupler is an integrated circuit with an LED and a zener diode encased in the same package.
61423. A Schmitt trigger has VT+ = 2.0 V and VT– = 1.2 V. What is the hysteresis voltage of the Schmitt trigger?
61424. Which of the following circuit parameters would be most likely to limit the maximum operating frequency of a flip-flop?
61425. The ADC0804 is an example of a ________.
61426. In a digital representation of voltages using an 8-bit binary code, how many values can be defined?
61427. A 4-bit R/2R ladder digital-to-analog converter uses ________.
61428. A binary-weighted-input digital-to-analog converter has a feedback resistor, Rf, of 12 k. If 50 A of current is through the resistor, voltage out of the circuit is ________.
61429. The resolution of a 6-bit DAC is ________.
61430. Which type of ADC quantizes the analog signal into a stream of bits whose amount corresponds to the signal level?
61431. A binary-weighted-input digital-to-analog converter has an input resistor of 100 k. If the resistor is connected to a 5 V source, current through the resistor is ________.
61432. In troubleshooting a DAC, we check its performance characteristics, such as ________.
61433. In a digital reproduction of an analog curve, accuracy can be increased by ________.
61434. In a 4-bit R/2R ladder digital-to-analog converter, because of negative feedback, the operational amplifier keeps the inverting (minus) input near ________.
61435. What is the result of taking more samples during the quantization process?
61436. Which A/D conversion method has a fixed conversion time?
61437. Which is a typical application of digital signal processing?
61438. If a DAC has a full-scale, or maximum, output of 12 V and accuracy of 0.1%, then the maximum error for any output voltage is ________.
61439. What do we call the manipulation of an analog signal in a digital domain?
61440. How are unwanted frequencies removed prior to digital conversion?
61441. Which type of programming is typically used for digital signal processors?
61442. Which of the following best defines Nyquist frequency?
61443. Which is not an A/D conversion error?
61444. Settling time is normally defined as the time it takes a DAC to settle within ________.
61445. Digital signal processors must be programmed to perform specific tasks.
61446. The flash method of analog-to-digital conversion uses comparators that compare reference voltages with the analog input voltage.
61447. Offset is the characteristic of a DAC defined by the absence of any incorrect step reversals.
61448. Digital filtering is faster than analog filtering.
61449. Successive-approximation is perhaps the most widely used method of A/D conversion.
61450. Digital signal processing must be at least half as fast as the incoming signal to be processed.
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