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must and should to connect back to back diode for analog and digital ground

Discussion in 'General Electronics' started by banu, Dec 10, 2003.

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  1. banu

    banu Guest

    Hi all,

    In my circuit board at the source, ground has been divided in
    to analog and digital ground respectively.In one of the article i have
    studied that it is better to connect back to back diode at the source
    ground for joining both the analog and digital ground. Is it must and
    should to use the diode,if so what type of diode i have to use.

    suppose for an analog ic if i had misplaced the ground
    connection as digital,does the current will flow in return to the
    source ground.why because i am getting different voltages by placing
    my DMM(digital multi meter) -ve terminal to different grounds.please
    clear me about this analog and digital ground in my circuit board.

    Thanks in advance.

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