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  1. #1
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    Input bias of transconductor

    Since a gm cell works in an open loop fashion, how is the input bias determined? Should the gm cell include an internal biasing circuit to set the input point voltage?
    However, from some gm-c filter diagrams, it doesn't seem like there is internal bias, because some applications ground one of the input of the gm cell.

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    Re: Input bias of transconductor

    Perhaps the grounded input is an ac ground..?

    I think that fully-differential gm-C would use a common mode feedback loop to determine dc bias. Probably, the input and output of the stage have the same dc point and the stages are dc-coupled after that...( not sure about that )


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  3. #3
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    Input bias of transconductor

    The input bias is determined by a number of things, including common mode levels and the maximum output current that you need.



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