CURRENT SAMPLE-AND-HOLD CIRCUIT, A/D CONVERTER AND A METHOD FOR OPERATING A CURRENT SAMPLE-AND-HOLD CIRCUIT

摘要

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 characterised 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.