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Old 29th November 2012, 02:39 AM   #7751
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I have an idea how the Salas Simplistic RIIA with folded cacode can be transferred into a transimpedance RIAA.
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Old 29th November 2012, 03:59 AM   #7752
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I actually came up with another circuit based on the "normal" simplistic. It saves one stage and one cap. I post a conceptual schematic tomorrow.
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Old 29th November 2012, 04:36 AM   #7753
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Correction : it saves one stage but still has two caps.
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Old 29th November 2012, 09:33 AM   #7754
RCruz is offline RCruz  Switzerland
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Now you have my full atention.....
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Old 29th November 2012, 10:46 AM   #7755
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And mine
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Old 29th November 2012, 02:54 PM   #7756
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Test circuit will be posted in the next hour.
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Old 29th November 2012, 04:28 PM   #7757
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NASA technologists test ‘game-changing’ data-processing technology | KurzweilAI
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Old 29th November 2012, 04:38 PM   #7758
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Quote:
...on developing a neurosynaptic core for a scalable neuromorphic architecture capable of emulating spiking neural networks
really cool sentence !
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Old 29th November 2012, 04:54 PM   #7759
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You have something like that in your brain. Yes, even you (:
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Old 29th November 2012, 05:23 PM   #7760
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Default TS

Here is the conceptual schematic of the Transimpedance Simplistic, TS in short.
The input is a high Gm transconductance stage with 160mS. This works on a low noise BJT cascode current source.
I will show you the values of the RIAA later today. With that values gain is around 66dB so there could be a volume control in the RIAA and a sensitive amp could be direct fed without a line stage.
The output buffer is from the Paradise. If we use a plus-minus supply on the buffer it could be DC coupled at the output but i think that is too much trouble for too little gain. I think a good cap at the output is just fine.
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