11. With the ever-increasing application of high-speed digital systems, often, traces on printed circuit boards must now be treated as transmission lines. A certain trace on a printed circuit board has a capacitance of 100 pF/m, an inductance of 5µH/m, and a length of 4 cm. The trace can be assumed to be lossless. a. Determine the characteristic impedance of the line. b. Determine the propagation delay of the line. c. If a digital signal with a rise time of 1ns is used on this trace, should the trace be treated as a transmission line? Justify your answer. 12. CAN bus support a maximum data rate of 1 Mbits/s whereas USB 2.0 supports data rates up to 480 Mbits/s. However CAN bus is used in automobiles and industry automation for rapid transfer of data between devices. Give TWO (2) reasons why CAN is preferred over USB in these applications. 13. Figure Q13 depicts a BJT common emitter amplifier connected to two separated DC voltage sources (i.e., VBB and Vcc). Given that the current gain ẞ is 120 and the voltage drop across the base to emitter junction is 0.7V, calculate the DC voltage vo as indicated in the figure. 800 Ω 7 ΚΩ ww + + 16 V VCE + + 6 V VBE 40092 + Figure Q13 HI 1. A digital synchronous sequential circuit is shown in Figure Q1.1. D CLR D CLR CLR . Figure Q1.1 a) Determine the output signals Qo, Q₁ and Q2 for the input signal Din shown in Figure Q1.2. Assume Qo = Q1 = Q2 = 0 at time t = 0. Figure Q1.2
Hi there! I’m working on some practice questions and would appreciate your help. I’ve uploaded two images: the first contains the initial questions (with the second part also typed out below), and the second image shows the final section of the worksheet. Could you please assist me with these?
THE QUESTION NUMBERS ARE IN ORDER.
1b). Suppose the flip-flops are 74F74 devices and the AND gates are 74F08 devices. Let maxtpd,D=9ns, maxtsu,D=3ns, and maxtpd,AND=6ns. What is the maximum clock frequency at which the circuit can operate reliably?
2. Compare serial transmission and parallel transmission and discuss their advantages and disadvantages.
3. Explain briefly how the slave can protect itself from being overwhelmed by the master in I2
4. A hypothetical logic family has the following specifications.
VOH=4.6V VIH=4.0V
VOL=0.5V VIL=1.0V
IOH=-1mA IIH=50μA
IOL=8mA IIL=-0.6mA
(a) What are the noise margins?
(b) What is the fan-out capability? That is, suppose all gates are chosen from the same logic family, how many gates can an output gate reliably drive?
5. Explain briefly why USB device address and endpoint are not included in the USB data packet format.
6. Consider an RS232 connection between two nodes. The receiver clock is 128kbps. What is the maximum throughput?
7. Give two reasons why PCI chooses reflected wave switching over incident wave switching.
8. Two logic families have static parameters specified below. Discuss the possibility of interconnecting the two logic families giving reasons.
|
Parameter |
Logic Family A |
Logic Family B |
|
VCC |
5V±0.5V |
5V±0.5V |
|
VIL |
0.9 V |
0.7 V |
|
VIH |
4.0 V |
3.6 V |
|
VOL |
0.5 V |
0.6 V |
|
VOH |
4.2 V |
3.8 V |
9. Explain briefly why ACK is not used for USB isochronous transfer mode.
10. Consider a CAN system. We use the bit time for time unit, i.e., one time unit is the time needed to transmit one bit. The longest propagation delay is two time units. Two nodes, A, and B, are trying to access the bus at time 0. Node C tries to access the bus at time 5. The identifier for node A is: 00011000110; the identifier for node B is: 00010101010; the identifier for node C is: 00001001101. Who will be the first to successfully send the data? Justify your answer
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