Wireless Communication

Frequently Asked Questions - Electronics Engg.

1. Insights of an inverter. Explain the working? 2. Insights of a 2 input NOR gate. Explain the working? 3. Insights of a 2 input NAND gate. Explain the working? 4. Implement F= not (AB+CD) using CMOS gates? 5. Insights of a pass gate. Explain the working? 6. Why do we need both PMOS and NMOS transistors to implement a pass gate? 7. What does the above code synthesize to? 8. Cross section of a PMOS transistor? 9. Cross section of an NMOS transistor? 10. What is a D-latch? Write the VHDL Code for it? 11. Differences between D-Latch and D flip-flop? 12. Implement D flip-flop with a couple of latches? Write a VHDL Code for a D flip-flop? 13. What is latchup? Explain the methods used to prevent it? 14. What is charge sharing? 15. While using logic design, explain the various steps that r followed to obtain the desirable design in a well defined manner? 16. Why is OOPS called OOPS? (C++) 17. What is a linked list? Explain the 2 fields in a linked list? 18. Implement a 2 I/P and gate using Tran gates? 19. Insights of a 4bit adder/Sub Circuit? 20. For f = AB+CD if B is S-a-1, what r the test vectors needed to detect the fault? 21. Explain various adders and diff between them? 22. Explain the working of 4-bit Up/down Counter? 23. A circuit has 1 input X and 2 outputs A and B. If X = HIGH for 4 clock ticks, A = 1. If X = LOW for 4 clock ticks, B = 1. Draw a state diagram for this Spec? 24. Advantages and disadvantages of Mealy and Moore? 25. Id vs. Vds Characteristics of NMOS and PMOS transistors? 26. Explain the operation of a 6T-SRAM cell? 27. Differences between DRAM and SRAM? 28. Implement a function with both ratioed and domino logic and merits and demerits of each logic? 29. Given a circuit and asked to tell the output voltages of that circuit? 30. How can you construct both PMOS and NMOS on a single substrate? 31. What happens when the gate oxide is very thin? 32. What is setup time and hold time? 33. Write a pseudo code for sorting the numbers in an array? 34. What is pipelining and how can we increase throughput using pipelining? 35. Explain about stuck at fault models, scan design, BIST and IDDQ testing? 36. What is SPICE? 37. Differences between IRSIM and SPICE? 38. Differences between netlist of HSPICE and Spectre? 39. What is FPGA? 40. Draw the Cross Section of an Inverter? Clearly show all the connections between M1 and poly, M1 and diffusion layers etc? 41. Draw the Layout of an Inverter? 42. If the current thru the poly is 20nA and the contact can take a max current of 10nA how would u overcome the problem? 43. Implement F = AB+C using CMOS gates? 44. Working of a 2-stage OPAMP? 45. 6-T XOR gate? 46. Differences between blocking and Non-blocking statements in Verilog? 47. Differences between Signals and Variables in VHDL? If the same code is written using Signals and Variables what does it synthesize to? 48. Differences between functions and Procedures in VHDL? 49. What is component binding? 50. What is polymorphism? (C++) 51. What is hot electron effect? 52. Define threshold voltage? 53. Factors affecting Power Consumption on a chip? 54. Explain Clock Skew? 55. Why do we use a Clock tree? 56. Explain the various Capacitances associated with a transistor and which one of them is the most prominent? 57. Explain the Various steps in Synthesis? 58. Explain ASIC Design Flow? 59. Explain Custom Design Flow? 60. Why is Extraction performed? 61. What is LVS, DRC? 62. Who provides the DRC rules? 63. What is validation? 64. What is Cross Talk? 65. Different ways of implementing a comparator? 66. What r the phenomenon which come into play when the devices are scaled to the sub-micron lengths? 67. What is clock feed through? 68. Implement an Inverter using a single transistor? 69. What is Fowler-Nordheim Tunneling? 70. Insights of a Tri-state inverter? 71. If an/ap = 0.5, an/ap = 1, an/ap = 3, for 3 inverters draw the transfer characteristics? 72. Differences between Array and Booth Multipliers? 73. Explain the concept of a Clock Divider Circuit? Write a VHDL code for the same? 74. Which gate is normally preferred while implementing circuits using CMOS logic, NAND or NOR? Why? 75. Insights of a Tri-State Inverter? 76. Basic Stuff related to Perl? 77. Have you studied buses? What types? 78. Have you studied pipelining? List the 5 stages of a 5 stage pipeline. Assuming 1 clock per stage, what is the latency of an instruction in a 5 stage machine? What is the throughput of this machine ? 79. How many bit combinations are there in a byte? 80. For a single computer processor computer system, what is the purpose of a processor cache and describe its operation? 81. Explain the operation considering a two processor computer system with a cache for each processor. 82. What are the main issues associated with multiprocessor caches and how might you solve them? 83. Explain the difference between write through and write back cache. 84. Are you familiar with the term MESI? 85. Are you familiar with the term snooping? 86. Describe a finite state machine that will detect three consecutive coin tosses (of one coin) that results in heads. 87. In what cases do you need to double clock a signal before presenting it to a synchronous state machine? 88. You have a driver that drives a long signal & connects to an input device. At the input device there is either overshoot, undershoot or signal threshold violations, what can be done to correct this problem? 89. What are the total number of lines written by you in C/C++? What is the most complicated/valuable program written in C/C++? 90. What compiler was used? 91. What is the difference between = and in C? 16. Are you familiar with VHDL and/or Verilog? 17. What types of CMOS memories have you designed? What were their size? Speed? 18. What work have you done on full chip Clock and Power distribution? What process technology and budgets were used? 19. What types of I/O have you designed? What were their size? Speed? Configuration? Voltage requirements? 20. Process technology? What package was used and how did you model the package/system? What parasitic effects were considered? 21. What types of high speed CMOS circuits have you designed? 22. What transistor level design tools are you proficient with? What types of designs were they used on? 23. What products have you designed which have entered high volume production? 24. What was your role in the silicon evaluation/product ramp? What tools did you use? 25. If not into production, how far did you follow the design and why did not you see it into production?

Head to the Opera Mini download page using your phone's browser, and choose a different version underneath the download link. The current version is 4, with 5 currently in pre-release testing.

There is not difference - just a persons preferrance in what they call it. In Europe, they use the term mobile phone more and in the US we call it cell phone.

there is no cell phone made in nz.

the fine for getting caught texting and driving is a total of five hundred Canadian dollars . If you get caught a second time you will have your license removed for thirty days. If you get caught they take your license and throw you in a jail cell . After sitting in a jail cell for three days you have to wait another 30 days to retake your drivers test. If you pass your test your free to go but if you get caught a fourth time you will be billed a huge fine and can be detained to police custody for up to a month of time.

the newer cellphones yea that's how u can mostly always have full bars if ur outside

there is kno answer to this question but you can look in google and type fact about cell phones thats it hope you find it.

Acer BeTouch e210

A telecom shelter contains transmitters inside.

It depends on the reference. If the reference electric power is P0 = 1 W (0 dB) then 98 dB equals 6309573444.8 Watts.

sim card

NO, cell phones contin a cpu, input and output devices but no hard drive

The first mobile telephone system was built in Sweden in 1956. Beside being a rotary dial system, incoming signals had to be routed through an operator, neither being text-friendly. Modern SMS messaging was not invented for another thirty-six years.

So, no.

USES OF MOBILE PHONES IN COLLEGE WOULD BE MINIMAL AS IT IS FOR THE STUDIES THAT WE GO TO THE COLLEGE FOR,EXCEPT IN EMERGENCY CASES.THE ABUSES HERE WOULD BE THAT IT WOULD HAMPER THE EDUCATION OF THE STUDENT AND WOULD ALSO BE A SOURCE OF DISTRACTION.

No, when texting it really should not matter where you are in the world. But to be sure, talk to your service provider to make sure there are no extra charges.

Can have cell phone I’ll keep it private

Phones first came out in 1999

money to cha cha is a ha ha no.

Well, it's pretty simple. Unlike the U.S, you don't have to buy a plan or anything. Just take your money, go to the shop, pay and get your Mobile :). Then buy a simcard, which is equivalent to about $3. Whenever you need to use the phone, buy a recharge card for the amount of money you want (very cheap) and recharge your pone credit :D

It is typically burned into a tiny ROM chip on the phone's circuit board.

Yes, Henry Sampson is the inventor of the cellphone.

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Wireless communication systems include pagers, cellular phones, personal communications systems

No one discovered cell phones. Someone named Dr.Martin Cooper invented cell phones. No one discovered cell phones. Someone named Dr.Martin Cooper INVENTED cell phones.

I just wanted to be seen on GOOGLE! :) (CLement)

Thats really immature and childish grow up wanker u should be ashamed of urself