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Sep 03 2014

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Riddles …

 

 

Here are some riddles for you.  All refer to the relativity of the positioning of the choke within the filter.

Assuming that you have a two identical sets of components, and you build two variants of the circuits as depicted …

Filter Riddle 1:

Filter Riddle 1

 

Do both of these power supplies provide the same level of ripple filtering ?
If “yes”,  how would you justify their complete “equivalence” ?
If “no”, which of them is the “better” one and why ?

Is your judgement based on: a) gut feeling ?  b). on spice simulations ? , or c). on actual measurements that you have conducted on both variants of such circuit ?

Riddle 2:

Filter Riddle 2

Do the two of the above presented power supplies, one providing a positive voltage, and one providing a negative voltage,  provide the same level of ripple filtering ?

If “yes”,  how would you justify their complete “equivalence” ?
If “no”, which of them is the “better” one and why ?

Is your judgement based on: a) gut feeling ?  b). on spice simulations ? , or c). on actual measurements that you have conducted on both variants of such circuit ?

Riddle 3:

Filter Riddle 3

In comparison to the two separate power supplies as from “Riddle 2″ -

Do these two versions of dual voltage power supplies as in this “Riddle 3″ provide the same level of ripple filtering on each of their rails ?  Please take note that one of them is a positive and negative supply, whilst the other is a supply providing two independent positive voltages.

If “yes”,  how would you justify their complete “equivalence” ?
If “no”, which of them is the “better” one and why ?

Is your judgement based on: a) gut feeling ?  b). on spice simulations ? , or c). on actual measurements that you have conducted on both variants of such circuit ?

Riddle 4:

Filter Riddle 4

 

You guessed … Equivalent or different in terms of ripple / hum generation ?

 

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