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SNLA140C

Prodigy 45 points

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Please refer to SNLA140C-May 2004-Revised March 2019, Page 51 Fig52 T1 and T2 Mentioned is 2N6782. Actual device do not have substrate terminal connection. Please clarify and suggest alternative device or circuit.

  • Hello Laxman,

    Thank you for pointing this out.  It appears that the component model we used has 4 terminals rather than 3, as you have suggested.  I am not sure why this is the case.  However, I will take it as a note for the next time this document needs to be revised.

    In any case, it should not make too much difference.  The key here is that you want your transistors to model ideal switches as best as possible.  So for example, you might want your component's R_DS_ON to be low. 

    For an alternative device, you do not need to be too picky.  Make sure your threshold voltage is reasonably low so that your "sample" signal source can turn the transistor on and off and try to pick something that has a low resistance while turned on, as explained above.

    Let me know if you have further questions.

    Regards,

    Daniel

  • In reply to Daniel Miller56:

    Daniel Miller56

    Hello Laxman,

    Thank you for pointing this out.  It appears that the component model we used has 4 terminals rather than 3, as you have suggested.  I am not sure why this is the case.  However, I will take it as a note for the next time this document needs to be revised.

    In any case, it should not make too much difference.  The key here is that you want your transistors to model ideal switches as best as possible.  So for example, you might want your component's R_DS_ON to be low. 

    For an alternative device, you do not need to be too picky.  Make sure your threshold voltage is reasonably low so that your "sample" signal source can turn the transistor on and off and try to pick something that has a low resistance while turned on, as explained above.

    Let me know if you have further questions.

    Regards,

    Daniel

    Daniel Miller56

    Hello Laxman,

    Thank you for pointing this out.  It appears that the component model we used has 4 terminals rather than 3, as you have suggested.  I am not sure why this is the case.  However, I will take it as a note for the next time this document needs to be revised.

    In any case, it should not make too much difference.  The key here is that you want your transistors to model ideal switches as best as possible.  So for example, you might want your component's R_DS_ON to be low. 

    For an alternative device, you do not need to be too picky.  Make sure your threshold voltage is reasonably low so that your "sample" signal source can turn the transistor on and off and try to pick something that has a low resistance while turned on, as explained above.

    Let me know if you have further questions.

    Regards,

    Daniel

    Daniel Miller56

    Hello Laxman,

    Thank you for pointing this out.  It appears that the component model we used has 4 terminals rather than 3, as you have suggested.  I am not sure why this is the case.  However, I will take it as a note for the next time this document needs to be revised.

    In any case, it should not make too much difference.  The key here is that you want your transistors to model ideal switches as best as possible.  So for example, you might want your component's R_DS_ON to be low. 

    For an alternative device, you do not need to be too picky.  Make sure your threshold voltage is reasonably low so that your "sample" signal source can turn the transistor on and off and try to pick something that has a low resistance while turned on, as explained above.

    Let me know if you have further questions.

    Regards,

    Daniel