Low Cost Blameless 100

[mjona]

.......perhaps a ccs with filter cap?
D. Self "audio power amplifier design handbook" fifth edition, chapter 4, page 101 at the bottom gives a hint..........

I don't have Self's book to be able to read page 101 but that number rang a bell over some magazine articles I kept that have become available online.

You could have found these yourself if you had done a search
- see Sources 101: Audio Current Regulator Tests for High Performance - Full Article | audioXpress.

Walt Jung has been around as a authority in the electronics industry for somewhere up near 50 years.

You have to read the Addendum to the last page to see his reference to a bootstrap capacitor which I described off the cuff.

In the other articles you will see mention of a couple of transistor types which are suited to have a sweet spot of performance in these (CCS) applications.

 

[mohdimas24]

Today I tried to develop blameless amplifiers with transitional Miller Compensation/(TMC). In the schematic there are two types of connections to the LTP pans. Which one is best?

R31 again I used to seek the bias voltage in the output transistor approaching the same.
C19 and R35 to adjust the margin gain in effect due to TMC. R18, C7 and C18 like this to get a phase and a margin gain that is at least qualified

 

[steveu]

C3

Maybe I'm somewhat dumb, but I don't get what C3 does?
Best regards!

C3 is just a ripple filter referenced to the filtered positive rail. It cleans up the bias for the two current sources.
LOL, it is not any kind of boot strap.

 

[brian92fs]

Douglas self talks about it in his book. It helps to increase to PSRR of the CCS.

 

[mjona]

C3 is just a ripple filter referenced to the filtered positive rail. It cleans up the bias for the two current sources.
LOL, it is not any kind of boot strap.

If you look at any of Self's circuits show, me any with positive supply RC filtering of the small signal stages.

Electricity involves the flow of electrons in the opposite direction to the conventional notion of current. The a.c. reference point is the junction of R13 and R17 in between earth the origin and the positive rail the end point.

 

[Tibouchina]

Some of Bimo's Blamess Designs?

I tried the blameless circuit with inexpensive and easy-to-find components in my place of residence. Results like this. How to raise a slew rate. You can also advise and repair this series

It might be helpful to have a look at some Bimo's designs for alternative ideas:


Blameless 50 Amplifier | Anistardi's Blog
Blameless 100 | Anistardi's Blog


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