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Slew rate control of I/O buffers

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AMS012

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Hi

Is there any way to control the slew rate of I/O buffers (assume a chain of inverters for simplicity) to bring it to a particular range across temperature variations?

Thanks
 

erikl

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You could use PTAT currents, or resistors with negative TC.
 

dick_freebird

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The cheap and dirty way for slew rate control is a series
gate resistor on the final sink and source devices. That
scheme has variabilities from Rg, Cdg and Vdd. If you
want something super controlled you're probably talking
a closed loop, quasi-integrator type feedback with a
reference, and this is unlikely to support high speeds
well.

How "particular" your range is will determine how heroic
the measures..
 

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