| 摘要 |
The invention creates an oscillator circuit, in particular for a refresh timer device of a dynamic semiconductor memory, having a capacitor device (C; C') which is connected between a first node (6) and a first supply potential (P2); a current mirror circuit (T1; T2) for supplying a charging current for the capacitor device (C; C') which is connected via a first transistor device (T4) to the first node (6) and which has a current source (SQ) for supplying a substantially temperature-independent reference current (Iref); a second transistor device (T5), which is connected between the first node (6) and the first supply potential (P2); a comparator device (COMP) with a first and a second input (+, -) and an output (A), the first input (+) being connected to the first node (6) and the second input (-) being connected to a reference potential (Vref); and a control signal generating device (INV; L1; G1) for generating a control signal and applying the same to a control terminal on the first transistor device (T4) and to a control terminal on the second transistor device (T5); the first and second transistor devices (T4; T5) and the control signal being configured in such a way that the capacitor device (C; C') can be charged via the first node (6) when a potential (Vcomp) at the first node (6) is lower than the reference potential (Vref), and can be discharged via the first node (6) when the potential (Vcomp) at the first node (6) is higher than the reference potential (Vref) such that the signal at the output (A) oscillates.
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