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Fast and precision current comparator
Fast and precision current comparator
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Old 4th August 2009, 06:54 PM   #11
PMA is offline PMA  Europe
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Jan to explain
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Old 4th August 2009, 06:56 PM   #12
Wavebourn is offline Wavebourn  United States
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Fast and precision current comparator
Quote:
Originally posted by PMA
Jan to explain
Waiting for Jan...
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Nothing in the universe is perfect. The ideal things are the ones that are most optimal. Optimization criteria, what matters. When I hear "No Compromise Design", I want to take a sledgehammer and test how impact-proof it is.
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Old 4th August 2009, 07:05 PM   #13
PMA is offline PMA  Europe
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Blomley
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Old 4th August 2009, 07:58 PM   #14
Wavebourn is offline Wavebourn  United States
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Fast and precision current comparator
Quote:
Originally posted by PMA
Blomley

Ah no, it is not about phase splitting. It is about a fast precision current comparator. It compares 2 symmetrically swinging currents with frequencies up to 1 MHz and values up to 20 mA and shows fast and precise differential between them as an infinitely amplified voltage.
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Nothing in the universe is perfect. The ideal things are the ones that are most optimal. Optimization criteria, what matters. When I hear "No Compromise Design", I want to take a sledgehammer and test how impact-proof it is.
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Old 4th August 2009, 08:26 PM   #15
darkfenriz is offline darkfenriz  Poland
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How about a current conveyour?
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Old 4th August 2009, 08:38 PM   #16
Wavebourn is offline Wavebourn  United States
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Fast and precision current comparator
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Originally posted by darkfenriz
How about a current conveyour?
What is it?
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Nothing in the universe is perfect. The ideal things are the ones that are most optimal. Optimization criteria, what matters. When I hear "No Compromise Design", I want to take a sledgehammer and test how impact-proof it is.
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Old 4th August 2009, 08:51 PM   #17
darkfenriz is offline darkfenriz  Poland
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Peter Current Conveyour

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Old 4th August 2009, 08:55 PM   #18
Wavebourn is offline Wavebourn  United States
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Fast and precision current comparator
What about this one?

Click the image to open in full size.
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Nothing in the universe is perfect. The ideal things are the ones that are most optimal. Optimization criteria, what matters. When I hear "No Compromise Design", I want to take a sledgehammer and test how impact-proof it is.
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Old 4th August 2009, 09:02 PM   #19
darkfenriz is offline darkfenriz  Poland
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seriously current conveyor is a similar concept to operational amplifier, but it has two low impedance inputs and a high impedance output, nomen omen.
It has a intrisic speed, because there is no voltage gain inside.

Your patterns may work, but every transimpedance stage made around a resistor in negative feedback loop may have problems with stability.
It's because from 'voltage' point of view, input impedance is infinite, and resistance in feedbackloop is given, so the 'voltage' gain is below 1, which is something most opamps hate.
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Old 4th August 2009, 09:32 PM   #20
Lumba Ogir is offline Lumba Ogir  Sweden
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darkfenriz,
Quote:
It has a intrisic speed, because there is no voltage gain inside.
Excuse me, but you probably meant to say "no current gain".
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