Simplest BJT configuration for a SPDT, single pole double throw switch

[abdan]

How is the simplest BJT configuration for performing a single pole double throw switch, preferably by clear explanation ?

 

[Bluejets]

single pole double throw switch

Doesn't make any sense...........

 

[crutschow]

Need to know exactly what you are trying to switch as BJTs can only be used for that purpose for a specific set of conditions.

 

[Sunnysky]

define SPDT in measurable terms or delete this useless question.

 

[Harald Kapp]

preferably by clear explanation ?

A good start is a clear explanation on your side what you want to do.
- what is your control signal?
- what are the signals to be switched (voltage, amperage, polarity)?
Without a more detailed problem description your chances for a satisfying answer are near zero.

 

[Harald Kapp]

@abdan : With regard to your report: No, it's not clear, that's why we we are asking.