N
Nemo
Why there are some nice n-channel JFETs with low input capacitance,
Idss, gate threshold voltage etc but p-channel types are rare?
There seem to be the J177 types, and possibly a device from Central
Semiconductor ("contact factory" - looks expensive for just messing
around) and that's about it. Am I missing some obvious device, are they
extraordinarily difficult to make, or is there a way of using n-channel
types in some sneaky way so p-channel types aren't often needed?
(I'm looking at bootstrapping a photodiode with positive bias instead of
the more usual negative bias, based on the classic circuits in Linear
Tech app notes like DN399 and their LTC6244 datasheet.)
Idss, gate threshold voltage etc but p-channel types are rare?
There seem to be the J177 types, and possibly a device from Central
Semiconductor ("contact factory" - looks expensive for just messing
around) and that's about it. Am I missing some obvious device, are they
extraordinarily difficult to make, or is there a way of using n-channel
types in some sneaky way so p-channel types aren't often needed?
(I'm looking at bootstrapping a photodiode with positive bias instead of
the more usual negative bias, based on the classic circuits in Linear
Tech app notes like DN399 and their LTC6244 datasheet.)