Current sample-and-hold-circuit, a/d converter and a method for operating a current sample-and-hold circuit
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United States of America Patent
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Nov 16, 2004
Grant Date -
Sep 25, 2003
app pub date -
Apr 7, 2003
filing date -
Aug 4, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a current sample-and-hold circuit comprising several sub-circuits, in which a current signal is stored. At least one of said sub-circuits contains a switch. The inventive current hold-and-sample circuit is characterized in that each of the sub-circuits contains a linear resistor, which is connected in such a way that the current signal generates a voltage drop across the resistor, that each of the sub-circuits contains at least one inverting control amplifier, which sets an initial current of the circuit in a hold operational mode, thus inducing a voltage drop across the resistor, said voltage drop being substantially as great as the voltage drop across the resistor before the hold operational mode.
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