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Simplistic NJFET RIAA
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Old 24th January 2013, 03:31 PM   #9141
buzzforb is offline buzzforb  United States
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Salas,
I have my student hat on and have a question. What makes one version folded, and the other not.
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Old 24th January 2013, 04:32 PM   #9142
Salas is offline Salas  Greece
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The cascode transistor folding to a ground referenced load.
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Old 26th January 2013, 01:45 PM   #9143
RCruz is offline RCruz  Switzerland
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Simplistic NJFET RIAA
Hi buzz.

The folded cascode provides higher output swing tan the telescopic at the expense of power dissipation.
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Old 26th January 2013, 01:52 PM   #9144
Salas is offline Salas  Greece
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They give advantage in opamps towards applications where the Vs can be limited in the system rail. Low dissipation and consumption goals in high density designs.
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Old 26th January 2013, 03:16 PM   #9145
buzzforb is offline buzzforb  United States
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Salas,
Rigol 1052 or 1102
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Old 26th January 2013, 03:31 PM   #9146
buzzforb is offline buzzforb  United States
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Here is the quick and dirty, with both SSLV's up and running.
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Old 26th January 2013, 03:46 PM   #9147
Salas is offline Salas  Greece
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Quote:
Originally Posted by buzzforb View Post
Salas,
Rigol 1052 or 1102
They are the same machine. 50MHZ is plenty for audio projects. They just bias a varicap in the analogue front end differently via firmware and slap a different model label. Their fan can be a nuisance. That is if you breadboard or repair for long and you need concentration. Changing it voids the warranty.
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Old 26th January 2013, 03:47 PM   #9148
Salas is offline Salas  Greece
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Quote:
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Here is the quick and dirty, with both SSLV's up and running.
Try it then to see about hum and get a taste.
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Old 26th January 2013, 04:05 PM   #9149
buzzforb is offline buzzforb  United States
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Both second stages are at 10V+ with 50r degeneration. Allowed me to drop B+ down, unless you think I need more headroom on second stage.
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Old 26th January 2013, 04:30 PM   #9150
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Its in spec.
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