What is that component called whose symbol is similar to that of a BJT except that in place of single arrow there are two arrows at place of indicating emitter?

 

See this pdf's
http://www.ti.com/lit/ds/symlink/opa660.pdf
http://www.ti.com/lit/an/sboa071/sboa071.pdf

 

this is form of abbreviation, nothing else. it is commonly seen in TTL datasheets for example.
it means that there are multiple transistors (number is same as number of emitters). and all of them have bases connected together into one "base", all collectors are connected together into one "collector" but emitters are individual circuits (inputs).
this is the most common case but as previous post shows, occasionally there are alternate representations that may not follow explained convention. in that case additional detailed circuit is used to explain internal connections.

 

this is form of abbreviation, nothing else. it is commonly seen in TTL datasheets for example.
it means that there are multiple transistors (number is same as number of emitters). and all of them have bases connected together into one "base", all collectors are connected together into one "collector" but emitters are individual circuits (inputs).
this is the most common case but as previous post shows, occasionally there are alternate representations that may not follow explained convention. in that case additional detailed circuit is used to explain internal connections.

Actually, the structure used to fabricate the device is a single-transistor with multiple emitter structures, and a common base region and collector region as shown here. It does act the same as multiple transistors with their bases and collectors tied together.

 

Actually, the structure used to fabricate the device is a single-transistor with multiple emitter structures, and a common base region and collector region as shown here. It does act the same as multiple transistors with their bases and collectors tied together.

thanks a lot.....

 

i get my answer....