compensation circuit

JONKERRR@TNO.NL
Wed, 4 Nov 92 17:59 MET

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We are currently designing a high speed compensation
circuit for spectrum-overlap correction on a high speed
sorter. Standard circuits are too slow. Ad Groenewegen, our
electronic engineer, designed a new circuit based on a
conventional difference-amplifier. He tested a number of
operational amplifiers. None of them are good and fast
enough. Our pulswidths are 1-2 usec. They are perfect for
10 usec pulses. Another additional problem is that signals
that are negative after compensation are inverted by the
logamp, become positive and disturb measurements.
We tested the following operational amplifiers:

AD744JN
AD845JN
AD846BN
AD849JN

Does anyone know a better one or a solution for the
inversion of negative signals?

Thanks,

Richard Jonker
TNO-ITRI
Rijswijk
The Netherlands

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