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    epp
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    How to make simple 1-bit DAC

    using analog components (in pspice schematics) ??
    Regards.

    •   Alt23rd January 2005, 16:30

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    Re: How to make simple 1-bit DAC

    1-bit DAC
    Why can't you use simple transister,output taken from collector



    •   Alt26th January 2005, 02:46

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    Re: How to make simple 1-bit DAC

    Hi,
    just add a RC filter and make sure that the bandwidth is correct.
    BRMAdhukar



    •   Alt26th January 2005, 08:45

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    epp
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    Re: How to make simple 1-bit DAC

    I need such a DAC to put in feedback of sigma-delta modulator i.e. between Q output of D-latch and difference junction. That signal is compared with reference voltage of 155 VAC.



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    Re: How to make simple 1-bit DAC

    Hi,
    Then you may have to use an opamp lowpass filter.
    brmadhukar



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    Re: How to make simple 1-bit DAC

    I think you are using the dac for delta modulation or sigma-delta modulation.

    Note: It is very important for you to know that also this dac has only 1-bit, the resolution for the dac has to be as "linear" as your overall adc!! However, for a 1 bit you will always get perfect linearity. But therefore the signal source of the dac (the voltage reference) has to keep constant, especially not signal dependent!!
    Therefore use switches (or switch arrays) and a buffered voltage refernence.

    If I'm wrong with my assumption, a simple comperator will do it!

    Hope I could help you.


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