B blackshadow New Member Apr 28, 2011 #1 can anyone itemize the process of biasing an NPN emitter follower to act as s switch?
ericgibbs Well-Known Member Most Helpful Member Apr 29, 2011 #2 blackshadow said: can anyone itemize the process of biasing an NPN emitter follower to act as s switch? Click to expand... hi, As a general rule. Knowing the collector current you are switching, set the transistor base current to be approx 10% of the collector current. This assumes a transistor gain of 10 when in Vce Sat. OK.? Edit: Incorrectly read the OP post as common emitter.! Last edited: Apr 29, 2011
blackshadow said: can anyone itemize the process of biasing an NPN emitter follower to act as s switch? Click to expand... hi, As a general rule. Knowing the collector current you are switching, set the transistor base current to be approx 10% of the collector current. This assumes a transistor gain of 10 when in Vce Sat. OK.? Edit: Incorrectly read the OP post as common emitter.!
D dougy83 Well-Known Member Most Helpful Member Apr 29, 2011 #3 For emitter-follower, no bias is used - for NPN, the collector goes to a positive supply, the emitter to the load and the base to the control signal. Have a look at: Common collector - Wikipedia, the free encyclopedia
For emitter-follower, no bias is used - for NPN, the collector goes to a positive supply, the emitter to the load and the base to the control signal. Have a look at: Common collector - Wikipedia, the free encyclopedia