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Old 1st March 2013, 04:48 AM   #1
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Default TRANSCON - 2 X Cascode VAS plus 1 X Transconductance

This is an idea to mix two concepts. And the result is not to bad. But this Amp is definitely not for capacity load, then it tends to oscillate. A output filter is recommended.
Because of the last voltage amplification the amp can power up from rail to rail.
The simulated THD is about 0.000015%
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Old 3rd April 2013, 09:36 AM   #2
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Hi Moshfet
go on!
interesting!
regards
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Old 3rd April 2013, 12:48 PM   #3
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Hi Pawel,

It's just a spontaneous idea, I will not further pursue this

At the time I am developing a module for an active Box. It should have:
-low Bias
-soft clipping
-short circuit protection
-rail to rail
-and, of course, acceptable performance

There must be an alternative to the LM ... and TDA ...
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Old 3rd April 2013, 12:51 PM   #4
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Wink like what?

Quote:
Originally Posted by moschfet View Post
Hi Pawel,

It's just a spontaneous idea, I will not further pursue this

At the time I am developing a module for an active Box. It should have:
-low Bias
-soft clipping
-short circuit protection
-rail to rail
-and, of course, acceptable performance

There must be an alternative to the LM ... and TDA ...
like vssa?
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Old 3rd April 2013, 01:02 PM   #5
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I really like the VSSA but has it
-low Bias (about 15mA for whole amp)
-soft clipping
-short circuit protection
-rail to rail
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Old 3rd April 2013, 01:24 PM   #6
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If you connect the LTP cascode reference voltage V1 to the current source (collector of Q2) rather than ground, I believe it will reduce the common-mode distortion produced in the non-inverting configuration by modulation of the C-E voltage of the input pair, despite their cascode.
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Last edited by Ken Newton; 3rd April 2013 at 01:33 PM.
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