The aim of the invention is to provide a means of carrying out essentially glitch-free blanking for analog signal values which occur in a periodical sequence and which are to be capacitively temporarily stored. Said signal values are digitised by an A/D converter (5) and are then to be erased in a capacitive temporary memory (2) before the next signal value occurs. According to the invention, a first OTA (operational transconductance amplifier) (11) which can be activated by a blanking pulse is provided. The non-inverting input (+) of said OTA is connected to the base point of the capacitive memory (2) and its output is connected to the charging connection (A) of the capacitive memory whilst the inverting input (-) is connected to the charging connection (A) of the capacitive memory (A) via an impedance converter (13) and a resistor (12) which limits the discharge current. A second OTA (10) serves as a signal driver whose degree of amplification is predetermined by the relationship between a resistor (1) which lies parallel to the capacitive memory (2) and a series resistor which determines the potential at the inverting input (-) of the second OTA (10).
