Is there any multiple base trasistors

[ranjeet]

Dear Friends,
I am an electronics graduate. And i used to study about multiple
emitter transistors and multiple collector transistors in my digital
electronics paper.
They are included in most of the gate architectures like TTL and IIL.
Then i wonder why there is no multiple base transistors. And if
someone like that is present then the design of ECL will be much more
simple. So I want to know that is there any stuctural difficulties for
making a multiple base transistor. Or is there any exists. So if
anyone know more about them please give me the details. I will be much
greatful to you.

Regards,
Renjith.R

 

[Norm Dresner]

Dear Friends,
I am an electronics graduate. And i used to study about multiple
emitter transistors and multiple collector transistors in my digital
electronics paper.
They are included in most of the gate architectures like TTL and IIL.
Then i wonder why there is no multiple base transistors. And if
someone like that is present then the design of ECL will be much more
simple. So I want to know that is there any stuctural difficulties for
making a multiple base transistor. Or is there any exists. So if
anyone know more about them please give me the details. I will be much
greatful to you.

http://www.intel.com/pressroom/archive/releases/20030612tech.htm

describes one example.

Try to Google for
"transistor gate structure"
without the quotes -- which is what I did -- and you'll get a few hits on
the first page to multiple gate transistor structures

Norm

 

[legg]

Dear Friends,
I am an electronics graduate. And i used to study about multiple
emitter transistors and multiple collector transistors in my digital
electronics paper.
They are included in most of the gate architectures like TTL and IIL.
Then i wonder why there is no multiple base transistors. And if
someone like that is present then the design of ECL will be much more
simple. So I want to know that is there any stuctural difficulties for
making a multiple base transistor. Or is there any exists. So if
anyone know more about them please give me the details. I will be much
greatful to you.

Regards,
Renjith.R

You might be interested to note that multiple base and multiple
emitter discrete transistors were JEDEC registered and marketed up
into the early '70s.

TI produced dual-base bipolars 3N34,35 and others including 3N56 in
TO-12 packages (4-lead TO-5), as well as dual emitter NPN parts 3N74
through 3N79 and dual emitter PNP parts 3N108 through 3N111 in TO-72
packages (4-lead TO-18).

These were second-sourced by Sprague.

Some custom IC mfrs will provide breadboading devices with multiple
lead components taken discretely to package pins, to their customers,
to aid in simulating the final integrated part.

There are so many more flexible alternatives to using this structure
in discrete applications, that it is unlikely to be marketed as such,
again.

RL

 

[ranjeet]

http://www.intel.com/pressroom/archive/releases/20030612tech.htm

describes one example.

Try to Google for
"transistor gate structure"
without the quotes -- which is what I did -- and you'll get a few hits on
the first page to multiple gate transistor structures

Norm

hi Norm

i am ranjeet. I have tried the search and got so much information
about the
multiple gate structures. But that structures are not actually what i
am searching for. They are just three dimensional realisation of the
normal gate for scaling down the device to nanometer range. I am in
search of a device which have more than one bases. That means the
transistor should act as a number of transistors whose emitters and
collectros are connected together. Do you have any clue. Then please
inform me.

Thanks and Regards,

Ranjeet

 

[ranjeet]

You might be interested to note that multiple base and multiple
emitter discrete transistors were JEDEC registered and marketed up
into the early '70s.

TI produced dual-base bipolars 3N34,35 and others including 3N56 in
TO-12 packages (4-lead TO-5), as well as dual emitter NPN parts 3N74
through 3N79 and dual emitter PNP parts 3N108 through 3N111 in TO-72
packages (4-lead TO-18).

These were second-sourced by Sprague.

Some custom IC mfrs will provide breadboading devices with multiple
lead components taken discretely to package pins, to their customers,
to aid in simulating the final integrated part.

There are so many more flexible alternatives to using this structure
in discrete applications, that it is unlikely to be marketed as such,
again.

RL

thank you for the valuable information
regards
ranjeet