Device and method for producing a refresh signal for discontinuously refreshing for a memory cell of a semiconductor device

摘要

The apparatus (10) for generating a refresh signal for discontinuously refreshing for a memory cell of a semiconductor memory device, wherein the apparatus (10) comprises:– a capacitor (c);– a differenzstromguelle (14) for providing a capacitor charging current (i _ diff) for charging the capacitor (c), wherein the difference current source (14) a temperature-dependent current source (30) for providing a current (i _ temp) having a temperature-dependent current and a temperature-independent current source (32) for providing a current (i _ const) to a temperature-independent current intensity, and the temperature-dependent current source (30) and the temperature-independent current source (32) are connected to one another in such a way that the current strength of the capacitor charging current (i _ diff) proportional to the difference of the temperature-dependent current intensity and the temperature-independent current level; and– a comparator (12) whose first comparator input (24) is electrically connected to the capacitor (c) is connected and the second comparator input (26) with a first reference signal for providing a predeterminable reference voltage (v _ ref) is connected, wherein said comparator (12) to a voltage comparison between the capacitor (c) at the capacitor voltage (v _ c) and..