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  1. V

    automatic test pattern generation

    VLSI device are tested by automatic test equipment that perform verity of test VLSI design are automated. automatic test pattern generation is design automation process used to find test vector I don't understand how the test vector generate automatically. can someone help ?
  2. V

    built in self test

    vlsi circuit also contain additional test circuit , circuit that allow to test their own operation by itself I am looking about information what is built in self test can someone explain little bit with example
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    oxidation in fabrication

    silicon die oxide layer is formed on the surface of silicon wafer by the oxidation process oxidation process oxidation method dry oxidation wet oxidation dry oxidation Si+O2 -.> Sio2 wet oxidation Si+2H2O -> Sio2+2H2 dry and wet oxidation are the type of thermal oxidation or thermal...
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    type of fault in vlsi circuit ?

    How many type of fault can be occur in VlSI circuit ? my effort physical fault during manufacturing process circuit fault during interconnection packing fault Q1 does anyone know another fault ? Q2 what is fault model and why does we need in vlsi circuit?
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    diffusion and ion implantation in fabrication

    look at this definitions Is it correct ? Ion implantation and diffusion both process is used to add impurity into wafer surface Diffusion is process by which atom of material are deposited on to the surface of wafer at high temperature Movement of atom form source to wafer at high...
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    embedded program

    Embedded system design there are two method to design embedded system design 1. using micro controller on development board 2. using micro processor and memory and other device Q1. when does we use micro processor and micro controller in embedded system Q2 what is embedded program ? embedded...
  7. V

    mos operation regions

    there are three regions of operation in mos transistor 1. cut off 2. linear 3.saturation consider cmos Inverter circuit Input is high -> output is low pmos in cut off -> nmos in linear Input is low -> output is high pmos in linear ->nmos in cut off I am having problem to understand last...
  8. V

    how to achieve desired delay time in cmos inverter

    what should we do to achieve specific delay just for example ( 215 ps) I think I need following thing but its not all I am missing some 1.power supply 2.threshold voltage for nmos 3.threshold voltage for pmos 4.load capacitance please anyone tell me what should we do to achieve 215 ps delay
  9. V

    hierachy design in vlsi

    hierarchical design is used to reduce complexity of circuit by chip designer mainly three approach are used 1)modularity 2)regularity 3)locality 1)modularity - submodule have well defined function and Interface 2)regularity - big system divide into similar submodule Q- I have searched on...
  10. V

    Is unix a real time operating ?

    Is unix a real time operating? If answer is no then what is meaning of " unix as real time operating system
  11. V

    transistor sizing for AND gate?

    AND gate with cmos transistor we can create cmos AND gate with 3 nmos and 3 pmos transistor pmos 1 and pmos 2 connected in parallel nmos 1 and nmos 2 connected in series nmos 3 and pmos 3 connected in series for inverter circuit inverter with nmos 3 W/L=3/2 and pmos 3 W/L=6/2 parallel...
  12. V

    real time operating system

    operating system that provide interface between hardware and application software operating system - windows Linux Example - we use operating system for computer - we use operating system for mobile 1) does ATM machine use operating system ? please give other example where we used...
  13. V

    Raspberry Pi

    Raspberry Pi is like small computer, . Raspberry pi can communicate with pc application via TCP/IP. that receive command from pc via Internet. it mean we can control any device via Raspberry what can we do with Raspberry Pi.? can we control robot via Raspberry Pi?
  14. V

    Assembly code for arm

    I am beginner for arm I just want to learn assembly for arm keil software I have written code for addition Area example , code readonly entry start mov R0 #5 mov R1#3 add R0, R0,R1 stop B stop End I am seeing 7 error massage assembling lcd.asm... lcd.asm(1): error A9: SYNTAX ERROR...
  15. V

    cmos inverter

    what should be good characteristic for cmos circuit 1)It should be dissipate less power 2)should have noise immunity 3)rise time and fall time should be less does anyone know another specification ?
  16. V

    fetching and executing instruction?

    micro controller contain mainly ALU, control unit ROM , RAM, PORT Processor take information from ROM, RAM, Input port fetching - decoder take command from rom memory decode - decoder decode instruction and tell the cpu what to do like add, sub execution- alu do the operation like...
  17. V

    how processor understand assembly command from memory??

    lets think I have micro controller 89c51 ,LED,switch,compiler(keil),programmer (flesh magic) SWITCH is input device connected port pin P0.1 LED is output device connected port pin P1.1 I have written assembly code in keil software ORG OH ON: SETB P1.1 ; LED IS ON OFF: CLRB P1.1 ; LED IS...
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    Instruction set need help

    I have question how to design Instruction set (just for paper work) I chose 8 bit instruction with 8 instruction 4 for arithmetic operations and 4 for logic operation 1)what should be operand and opcode ? 2)what should I know before to design ?
  19. V

    what is address bus and instruction bit in 8051

    I always confused actually what is 8 bit address bus and instruction . bus is wire or cable that is used to carry the signal following is confused term for me 1) address bit and instruction bit is same or different things? 2)data bus - if the data is 8 bit and 8bit address it means it can be...
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    cadence tool?

    I use cadence at school, which is very expensive It can be used only on school computer. I am looking for open source cadence tool. Is there any free cadence tool ?
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