Single Channel 4 bit Pulse Code Modulation Transmitter
Digital Analog mixed analysis
input signal, output of DAC and recovered signal
FFT of recovered signal

Single Channel 4 bit Pulse Code Modulation Transmitter

(9 customer reviews)

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e74609d6-20c1-40a0-8115-fcf0c1da02e4.rar

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Description

SPICE simulation of a PCM system that uses 4 of the 8 bits available. The input signal is a 1Khz sinusoidal sampled at 8khz, which is the rate used in the public switched telephone network (PSTN), and the ADC parallel output it’s converted to a serial bit stream. To show the recovered signal, a serial to parallel converter and a DAC is attached to the transmitter. The DAC output is low pass filtered.

  • Free
  • Intermediate
  • 11-20
  • PSpice
  • 9.1+
  • No
  • Digital Analog mixed analysis input signal, output of DAC and recovered signal FFT of recovered signal

9 reviews for Single Channel 4 bit Pulse Code Modulation Transmitter

  1. ahmed4fcb –

    tnx what an excellent project

  2. Chrishew09 –

    where can i find the model for the 74116? it’s not part of the eval.lib file

  3. tobytone –

    No, you are right, it’s not but, ok, here it is:
    * 74116 DUAL 4-BIT LATCHES WITH CLEAR
    *
    * The TTL Data Book, Vol 2, 1985, TI
    * MCG 07/09/93
    *
    .SUBCKT 74116 C1BAR_I C2BAR_I CLRBAR_I D1_I D2_I D3_I D4_I Q1 Q2 Q3 Q4
    + optional: DPWR=$G_DPWR DGND=$G_DGND
    + PARAMS: MNTYMXDLY=0 IO_LEVEL=0
    *
    U116_1 BUFA(7) DPWR DGND
    + D1_I D2_I D3_I D4_I C1BAR_I C2BAR_I CLRBAR_I
    + D1 D2 D3 D4 C1BAR C2BAR CLRBAR
    + D0_GATE IO_STD
    *
    U116_2 DLTCH(4)
    + DPWR DGND
    + $D_HI CLRBAR LAT
    + D1 D2 D3 D4
    + Q1 Q2 Q3 Q4
    + $D_NC $D_NC $D_NC $D_NC
    + D_74116 IO_STD
    *
    U116_3 INVA(2)
    + DPWR DGND
    + C1BAR C2BAR
    + C1 C2
    + D0_GATE IO_STD
    *
    U116_4 AND(2)
    + DPWR DGND
    + C1 C2
    + LAT
    + D0_GATE IO_STD
    *
    U116CON CONSTRAINT(7) DPWR DGND
    + CLRBAR C1BAR C2BAR D1 D2 D3 D4
    + IO_STD
    +
    + WIDTH:
    + NODE = CLRBAR
    + MIN_LO = 18NS
    + MIN_HI = 18NS
    +
    + WIDTH:
    + NODE = C1BAR
    + MIN_LO = 18NS
    + MIN_HI = 18NS
    +
    + WIDTH:
    + NODE = C2BAR
    + MIN_LO = 18NS
    + MIN_HI = 18NS
    +
    + SETUP_HOLD:
    + DATA(4) D1 D2 D3 D4
    + CLOCK LH = C1BAR
    + SETUPTIME_HI = 8NS
    + SETUPTIME_LO = 14NS
    + RELEASETIME = 2NS
    + HOLDTIME = 8NS
    +
    + SETUP_HOLD:
    + DATA(4) D1 D2 D3 D4
    + CLOCK LH = C2BAR
    + SETUPTIME_HI = 8NS
    + SETUPTIME_LO = 14NS
    + RELEASETIME = 2NS
    + HOLDTIME = 8NS
    +
    + SETUP_HOLD:
    + DATA(1) C1BAR
    + CLOCK LH = CLRBAR
    + SETUPTIME = 8NS
    *
    .ENDS

  4. tobytone –

    If you can’t use this because of the formatting, email me and I’ll send you the complete file!

  5. Chrishew09 –

    Please forgive me, but I do not see any way to email you directly through youspice.

  6. tobytone –

    ok, leave your email and I’ll get back to you.

  7. sandeepreddy –

    hiiii good project and is it works as hard ware project ?

  8. Paul Tobin –

    Hello, I have not built this circuit but I see no reason why you couldn’t build it in hardware.
    Paul Tobin

  9. sandeepreddy –

    ok can you provide me documentation of the project so that i can CLEARLY KNOW THE WORKING OF THE CIRCUIT? CAN YOU MAIL ME

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