how to compensate Vcb transconductance modulation in BJT CC CE

[strawberry]

is there a circuit that could do?

[razvan784]

Cascode?

[TimFox]

Another advantage to the cascode connection (base of upper transistor coupled, possibly through a capacitor, to the emitter of lower transistor) is that the base current I_B1 of the input transistor is also modulated by V_CB.  When that current flows through the source impedance, it imposes a voltage at the input which is a non-linear function of the input voltage.  Since that voltage actually exists at the input terminal, the non-linear distortion cannot be removed by negative feedback, which only changes the gain for the parasitic voltage.  The cascode with the upper transistor tries to keep V_CB of the input transistor constant as the actual input voltage changes, thus reducing the unwanted change in input transistor base current.

[mawyatt]

There's a discussion of a cascode like amplifier that you might find useful, see post #9

https://www.eevblog.com/forum/rf-microwave/common-gate-wideband-rf-amplifiers/

Best,

[David Hess]

A cascode is one way.  Another way is to add emitter degeneration.