Oscillators – Relaxation oscillators
Reexamination Certificate
2007-09-18
2007-09-18
Pascal, Robert (Department: 2817)
Oscillators
Relaxation oscillators
C331S111000, C331S135000, C331S057000, C331S065000, C331S185000
Reexamination Certificate
active
11270597
ABSTRACT:
A CR oscillation circuit comprises first and second logic elements, a capacitive element, and a resistive element. The first logic element is connected between a first node and a second node. The second logic element is connected between the second node and a third node. The capacitive element is connected between the first node and the second node. The resistive element is connected between the first node and the third node. The capacitive element includes a well, a diffusion layer, a gate electrode and a gate oxide film. The capacitive element has a voltage-dependence characteristic such that its capacitance value varies according to the variation in a supply voltage. The capacitance value of the capacitive element decreases when the on-resistance of the first and second logic elements increases according to the variation in the supply voltage.
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Nishi Kazuyoshi
Takiguchi Junji
Johnson Ryan J
McDermott Will & Emery LLP
Pascal Robert
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