Posted by Damir [ 213.202.85.145 ] on July 26, 2005 at 05:39:23:
In Reply to: cascodes posted by Thrint on July 25, 2005 at 19:44:20:
Altough I didn`t try it, IMO - pentode can be implemented (little problem with g2 voltage, but some people use pentode for "upper" tube in mu-follower, or like active load). But, IME - gain of pentode depends very little of "upper" tube. A~gm1*Rl, where gm1 is gm of the "lower" tube.
Composite model for "penscode" - I have no idea, maybe SPICE it first and see what PC says...
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