- #1
Adder_Noir
- 239
- 0
Hi,
Please have a look at the following image:
http://img70.imageshack.us/img70/4008/parallelryl3.jpg"
I have a problem that the book states the resistance seen by C1 is the parallel resistance of the resistance looking into the base and that of the voltage divider. The resistance looking into the base is (hfe x re) in this case 750k. No problems there I understand how that one is derived.
I really don't get however how R1 and R2 are seen by the capacitor as a parallel resistance? The book evaluates R1 and R2 in parallel and then treats them as a single resistance. It then puts said resistance in parallel with the 750k.
I understand all that but from C1's perspective why is R1 included and how can it possibly see R1 and R2 as a parallel part of a parallel load?
Also does anyone know how to post up pictures instead of links?
I'm a bit of a dummy in electronics so please if you wouldn't mind keep the replies simple for my inadequate experience to understand
Please have a look at the following image:
http://img70.imageshack.us/img70/4008/parallelryl3.jpg"
I have a problem that the book states the resistance seen by C1 is the parallel resistance of the resistance looking into the base and that of the voltage divider. The resistance looking into the base is (hfe x re) in this case 750k. No problems there I understand how that one is derived.
I really don't get however how R1 and R2 are seen by the capacitor as a parallel resistance? The book evaluates R1 and R2 in parallel and then treats them as a single resistance. It then puts said resistance in parallel with the 750k.
I understand all that but from C1's perspective why is R1 included and how can it possibly see R1 and R2 as a parallel part of a parallel load?
Also does anyone know how to post up pictures instead of links?
I'm a bit of a dummy in electronics so please if you wouldn't mind keep the replies simple for my inadequate experience to understand
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