T
Teece
Hi,
I am having trouble with the "low going edge" of a squarewave using a
Darlington pair that I am using to replace a single transistor. Since this
is an existing design, and I am trying to save the layout, etc, I don't have
complete freedom to change a lot of things around.
I am using the NPN Darlington as a Common Collector input buffer. Since it
is an integrated component (two transistors in a SOT-23 package) I don't
have the ability to add a resistor to the emitter of the "first" transistor
so as to bleed off charge during the low going edge of a square wave.
What would work best? Would reducing the base current help? In a Darlington
pair, it is already incredibly low.
Thanks
Tom
I am having trouble with the "low going edge" of a squarewave using a
Darlington pair that I am using to replace a single transistor. Since this
is an existing design, and I am trying to save the layout, etc, I don't have
complete freedom to change a lot of things around.
I am using the NPN Darlington as a Common Collector input buffer. Since it
is an integrated component (two transistors in a SOT-23 package) I don't
have the ability to add a resistor to the emitter of the "first" transistor
so as to bleed off charge during the low going edge of a square wave.
What would work best? Would reducing the base current help? In a Darlington
pair, it is already incredibly low.
Thanks
Tom