Sample-and-hold circuit arrangement.

摘要

The invention relates to a sample-and-hold circuit arrangement comprising a differential amplifier - (5) followed by an inverting amplifier (8).

In accordance with the invention there is provided a third amplifier (12) and a capacitor (14) which connects an output of the third amplifier to its input. The inverting amplifier (68) ensures that the voltage on the output (16) of the arrangement is independent of the offset voltage of the differential amplifier (5). Moreover, the capacitor (14) maintains the voltage on the output (15) during a sampling interval at the value which it had in the directly preceding hold interval.