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  1. V

    nor gate cmos circuit

    hello I made Nor gate with coms transistor please check the connection If my diagram is correct then I want to decide length and width of transistor ? still I have not decide width and length I just want to confirm that my diagram is correct ?
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    Procedural Assignment error (verilog )

    when i compile code I am getting following error line if (ld==1) q4 <= d4; Error (10137): Verilog HDL Procedural Assignment error at core_v.v(70): object "q4" on left-hand side of assignment must have a variable data type module core_v(clk,ld,d0, q0,d1,d2,q1,q2,a,b,z,sel,d,q,d3,q3,d4,q4 )...
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    8051 specification

    hello, I have doubt about 8051 specification 8 bit microcontroller 8 bit data 8 bit instruction 8 bit decoder 16 bit program counter 8 bit data If we want to deal with 8 bit data so we use 8 bit 8 bit instruction if instruction is 8 bit then we can do 256 operation (and.or.addition ....upto...
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    algorithm for micro controller

    hello experts I want to write verilog code for microcontroller (8051) I have done little homework designing controller is not easy so I have divided my homework first I have developed algorithem (algorithm ) Design for microcontroller Verilog code What is Input for microcontroller What is...
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    LED blinking with switch

    I am trying to blink led with switch I have one switch and one LED. switch is connected to port pin PO.0 LED is connected to port pin P1.0 if switch is on then LED is on if switch is of then LED is of assembly code org 0h ON: setb P1.0 ; led on setb P0.0...
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    blink led

    I want to blink led for some time I made diagram using proteus component AT89C51 crystal LED diagram assembly code org 00h Setb P1.0 ; Led on clr P1.0 ; Led off delay: mov R1, #20 mov R2, #0 delay1: djnz R2...
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    how to write input and output for microcontroller ?

    hello experts I want to write input and output for microcontroller in verilog langugae I have tried to write code Microcontroller has following function · ALU · Decoder · Port · Counter · Interrupt · Accumulator · Stack pointer · Data pointer · Special function register ·...
  8. V

    verilog code need help

    I have made sample code for 4 bit ALU and 3 to 8 decoder to make 4 bit processor . as designer we can design anything so I have started to design processor with two function ALU and decoder specification 4 bit processor 4 bit ALU 3 to 8 decoder 4 bit ALU verilog code Module alu...
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    N Bit ALU

    how to make N bit ALU ALU has two input word A, B N bit ALU An input Bn input F input example 1 bit alu 0+1=1 2 bit ALU 01+10=11 4 bit ALU 0101+1010=1111 example - 1 bit ALU 1 bit input A 1 bit input B 1 bit output F s ALU performance 0 F= addition 1 F= A and B same...
  10. V

    machine language to assembly language

    everyone say start with basics learn some basic things so my another effort for learning about micro controller I know about basic gates like AND, NOT and OR, we can make following circuits with help of basic gates Addition Subtraction Division Multiplication Logical AND Shift Left Shift...
  11. V

    power supply circuit

    transformer connected to half wave rectifier circuit with 50 ohms load given primary turn Np = 5 secondary turn Ns=1 peak voltage Vp= 220 load Rl= 50 ohms find out unknown value primary voltage ? secondary voltage ? I dc current ? I ac current ? peak current ? my effort formula...
  12. V

    verilog code

    please check out this verilog code for D flip flop module d_flipflop (d,clk,q,q1); input d; input clk; output q; output q1; reg q, q1; always @ (posedge clk); initial begin q = d ; q1=~d; end endmodule when I don't use initial statement. I show error. what is use of initial statement
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    what is embedded computing system design

    I don't understand what is meaning of embedded computing system design embedded system is combination of hardware and software that perform some specific task does embedded system and embedded computing system is different things ? Q what is embedded system design process ?
  14. V

    monolithic kernel

    I am having problem to understand some statement kernel is not modular, kernel is not fault tolerant , kernel is not configurable kernel is not power optimized can anyone explain little bit ?
  15. V

    How to make a crunchy silicon wafer

    i have doubt that which type of material we used in VLSI technology silicon raw material is silicon sand or silicon gas sand -> silicon gas - reactor -> poly-silicon -> electronic grade silicon -> cz method -> wafer I think sand is raw material from earth It convert into silicon gas , then...
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    kernel and scheduling for RTOS

    scheduling is process by which operating system decide which one task will be next on processor scheduling determine the order in which task are executed different os kernel may use different scheduling algorithm scheduling algorithm First Come First Serve (FCFS) Scheduling...
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    boltzmann carrier equation

    I am little bit confused about derivation for boltzmann equation for electron boltazmann relationship describe transport of free carrier in semiconductor look this links http://relativity.livingreviews.org/...ticlesu25.html http://en.wikipedia.org/wiki/Boltzmann_equation I don't understand...
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    output for decoder and demultiplexer

    I need some help to understand truth table 1 to 2 demultiplexer input I select line S output D0, D1 I S Do D1 0 0 0 1 1 0 1 1 how to determine D0 and D1 by boolean expression ? 2 to 4 decoder A is the address and D is the dataline A1 A0 D3 D2 D1 D0 0 0 0 1...
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    stuck at fault

    hello I would like to know how we can analyze the fault using look at this pdf file I Image 1st Fault-free function z = AB+CD Faulty function zf = AB Fault-free function z = AB+CD Faulty function zf = AB+D Q1 how we will know that function AB is faulty and function AB+D is faulty? Q2 how to...
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    charge carrier transport in semiconductor

    there are two type of charge carrier in semiconductor , one is electron which carry negative charge and other is hole which carry positive charge and generate electron hole pair carrier transport means the motion of two charge carrier what is carrier statics in semiconductor ?
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