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Old 5th April 2012, 07:39 AM   #1
Stee is offline Stee  Italy
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Default Enhanched CFP amplifier

this idea is NOT tested
please edit your modification
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Old 5th April 2012, 08:10 AM   #2
forr is offline forr  France
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I suspect it should have better specs than the original, first of all, a better PSRR.
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Old 5th April 2012, 09:54 AM   #3
DF96 is offline DF96  England
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I can't see any CFPs in that circuit. Have they been 'enhanced' away? I can see an emitter follower, and a complementary feedback triple.

Why don't you tell us about your modifications first?
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Old 5th April 2012, 10:12 AM   #4
godfrey is offline godfrey  South Africa
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The name's "Hiraga" not "Hiagra".

Quote:
Originally Posted by Stee View Post
this idea is NOT tested
Indeed, needs work.
...
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Old 5th April 2012, 10:22 AM   #5
godfrey is offline godfrey  South Africa
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Quote:
Originally Posted by DF96 View Post
Why don't you tell us about your modifications first?
Looks like he started with Jean Hiraga's design (below), and broke it.
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Old 5th April 2012, 10:31 AM   #6
Stee is offline Stee  Italy
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Thanks
Indeed, needs work.
please help me
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Old 5th April 2012, 01:06 PM   #7
DF96 is offline DF96  England
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Quote:
Originally Posted by godfrey
Looks like he started with Jean Hiraga's design (below), and broke it.
Yes.

Quote:
Originally Posted by Stee
please help me
OK. The best help I can give is to suggest you read a good book on electronics (e.g. H&H), then read it again until you understand it.
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Old 5th April 2012, 10:03 PM   #8
Stee is offline Stee  Italy
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Default GOOD IDEA

for clipping it's a good solution
reduce bias

about crossover distortion
just reducing gain from 30 to 24
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Old 6th April 2012, 12:15 AM   #9
godfrey is offline godfrey  South Africa
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Quote:
Originally Posted by DF96 View Post
The best help I can give is to suggest you read a good book on electronics (e.g. H&H), then read it again until you understand it.
+1 Agreed, unless Stee's contributions are intended as a joke. (Post 8 is ridiculous).
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Old 6th April 2012, 08:13 AM   #10
Stee is offline Stee  Italy
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Default A1186 & C.

When you have
(as in this case)
in the power output
collectors in common
need to standardize gain between the two rails
(the output emitter follower has gain equal to one)

for this purpose
advice in the bipolar attached photo
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