What does this sentence about low distortion mean?

[aryajur]

--- For low distortion, the drains (or collectors) of a differential amp's front-end should be bootstrapped to the source (or emitter) so that the voltages on the part are not modulated by the input signal.


Does it mean adding a capacitor from the drain to the source?

 

[on1aag]

Re: What does this mean?

Hi Aryajur,

The signal from the source of the "lower" transistor should be ac coupled
to the gate of the "upper" transistor, Vds of the lower transistor will remain
relatively constant while Vds of the upper transistor will vary proportional
to the input signal.

Regards,

on1aag.

 

[aryajur]

Re: What does this mean?

Hello onaag1,
thanks for your reply, but its difficult to understand, could you put up some kind of diagram to show what you mean?