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Old 8th May 2013, 07:46 PM   #4061
maxente is offline maxente  Romania
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Ok sonnya i did what you said, i install two 47p and it's stable now
I can set the offset with no problem but there is no way i can set the output bias even if i left those 1k/100R or replace with 2k2/220R

Last edited by maxente; 8th May 2013 at 07:48 PM.
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Old 11th August 2013, 03:18 PM   #4062
masood is offline masood  India
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Originally Posted by Lazy Cat View Post
Requested by many, SSA BIGBT HP, SSA CCS schematics and final product successfully made in June 2012
dear sir
what is the meaning of ssa,bigbt,hp,ssa,ccs .what are the difference and which is the best circuit thanks
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Old 11th August 2013, 03:22 PM   #4063
masood is offline masood  India
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Originally Posted by shaan View Post
Hi max.

You might try these to make it stable:

1. Install two 47pF in parallel with the 1K feedback resistors, one for each.

Or,

2. Replace 1K/100R feedback network with 2K2/220R.

I can't assure but one of these tricks might help. It will be sad to see you giving up after this much progress.

shaan
dear shaan,
can you teach me that how can amplifier circuit are made how it work,what are the types of classs amplifier and ther limitations which is the best amplifier such as class a,ab,d etc. thanks
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Old 11th August 2013, 03:54 PM   #4064
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Quote:
Originally Posted by masood View Post
what is the meaning of ssa,bigbt,hp,ssa,ccs
You too have problem with acronyms ?
SSA is the name given by L.C. to one of his current feedback amplifier, working in class AB.
bigbt is the name (given by L.C. ?) of a power device, composed by a mosfet followed by a power bipolar transistor. Can be in a case, like darlo,ngtons, or build with discrete devices.
hp is the French acronym for loudspeaker, or power of a motor..
CSS means current source. Can be too in a single device, or build with a transistor or mosfet, and some passive components. It is supposed to provide a fixed current, whatever the impedance changes of the charge at their output.

For amplifier classes, please refer to Google or electronic books.
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Old 11th August 2013, 04:13 PM   #4065
masood is offline masood  India
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Originally Posted by Esperado View Post
You too have problem with acronyms ?
SSA is the name given by L.C. to one of his current feedback amplifier, working in class AB.
bigbt is the name (given by L.C. ?) of a power device, composed by a mosfet followed by a power bipolar transistor. Can be in a case, like darlo,ngtons, or build with discrete devices.
hp is the French acronym for loudspeaker, or power of a motor..
CSS means current source. Can be too in a single device, or build with a transistor or mosfet, and some passive components. It is supposed to provide a fixed current, whatever the impedance changes of the charge at their output.

For amplifier classes, please refer to Google or electronic books.
dear sir,
thanks a lot
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Old 11th August 2013, 04:21 PM   #4066
brianco is offline brianco  Ireland
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CCS = CONSTANT current source.

HP, I imagine, in this context = High power
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Old 11th August 2013, 10:16 PM   #4067
Stee is offline Stee  Italy
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see my last project
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Old 12th August 2013, 11:01 AM   #4068
Jay is offline Jay  Indonesia
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Originally Posted by Stee View Post
see my last project
Cool Stee. Does it sound good? How it is compared to SSA?

SSA = Simple Symetrical Amplifier
HP = High Performance
IGBT = Insulated Gate Bipolar Transistor
BIGBT = Balanced or bidirectional IGBT
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Old 12th August 2013, 11:47 AM   #4069
mikelm is offline mikelm  England
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BIGBT is a composite OP device consisting of a mosfet i/p device and two bipolar output devices. It is configured as a combination of a darlington & a compound feedback pair.
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Old 12th August 2013, 01:56 PM   #4070
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Quote:
Originally Posted by Esperado View Post
HP is the French acronym for loudspeaker, or power of a motor..
Quote:
Originally Posted by brianco View Post
HP, I imagine, in this context = High power
Quote:
Originally Posted by Jay View Post
HP = High Performance
HP= Hewlett Pacard.

You are all welcomed in my anti-acronyms lobby.
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Last edited by Esperado; 12th August 2013 at 01:59 PM.
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