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How to simulate the stability of a fully differential amplifier using the iprobe?

xxgenerall

The schematic is as follows. 

It is very useful tool used to simulate amplifiers' stability. Well, when simulating a fully differential amplifier, how to use the iprobe?

Thanks in advance. 

Parents

  • xxgenerall said:

    Thank for all your help.

    I've checked the cmdmprobe, which circuit is same as the "diffprobe" subcircuit. Does diffstbprobe has the some circuit inside? Does it contain some iprobe inside?

    Thanks a lot. 

    In a few experiments I did some time ago, the diffstbprobe behaved exactly like a circuit consisting of two ideal_balun and two iprobe components from analogLib, with one iprobe connected between the d ports of the ideal_balun components, and the other iprobe connected between their c ports. This would be exactly the circuit described in reply #1 of http://www.designers-guide.org/Forum/YaBB.pl?num=1190707743 (3 years before the diffstbprobe was introduced in September 2010 in MMSIM 10.1).

Reply

  • xxgenerall said:

    Thank for all your help.

    I've checked the cmdmprobe, which circuit is same as the "diffprobe" subcircuit. Does diffstbprobe has the some circuit inside? Does it contain some iprobe inside?

    Thanks a lot. 

    In a few experiments I did some time ago, the diffstbprobe behaved exactly like a circuit consisting of two ideal_balun and two iprobe components from analogLib, with one iprobe connected between the d ports of the ideal_balun components, and the other iprobe connected between their c ports. This would be exactly the circuit described in reply #1 of http://www.designers-guide.org/Forum/YaBB.pl?num=1190707743 (3 years before the diffstbprobe was introduced in September 2010 in MMSIM 10.1).

Children
  • in reply to Frank Wiedmann
    Frank Wiedmann said:

    xxgenerall said:

    Thank for all your help.

    I've checked the cmdmprobe, which circuit is same as the "diffprobe" subcircuit. Does diffstbprobe has the some circuit inside? Does it contain some iprobe inside?

    Thanks a lot. 

    In a few experiments I did some time ago, the diffstbprobe behaved exactly like a circuit consisting of two ideal_balun and two iprobe components from analogLib, with one iprobe connected between the d ports of the ideal_balun components, and the other iprobe connected between their c ports. This would be exactly the circuit described in reply #1 of http://www.designers-guide.org/Forum/YaBB.pl?num=1190707743 (3 years before the diffstbprobe was introduced in September 2010 in MMSIM 10.1).

    To make this a little more clear, here is an image of this configuration:

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