fets and diodes

[Harry Bissell]

Comment inline...

Uros wrote:

> Hi people ,
> two questions : are some fet transistors more suited for using as
> VCresistance than others , or it does not matter what fet is used ?

Some better, but don't know what parameter makes them better.

>
> And second : is it possible to use diode ladder structure for phase shifter
> and has anybody done this ?

Yes and Yes... I think ARIES did it... you drive the top of the ladder instead
of the bottom (with out of phase drivers) then vary the collector currents in
the ladder, read out at the bottom of the ladder in the normal fashion....

H^)

>
>
> Uros