Back to results
US 2009/0154036 A1Published application
Electrostatic discharge circuit
AssigneeSilicon Integrated Systems Corp.
InventorWen Dong Yen
Life of this patent
Estimating the term…
Abstract
The invention discloses an electrostatic discharge circuit. The spirit of the invention is that the electrostatic common portion in the conventional integrated circuit is divided into at least two sets corresponding to at least two internal common voltages, separately. In addition, the electrostatic common portions use serily connected diode rings. Therefore, the number of diodes of the diode rings coupling to the higher common voltage and the electrostatic common portion, coupling to the higher common voltage, can be reduced.
Claims7
An electrostatic discharge circuit, comprising:
- at least one first common voltage portion for coupling to a circuit that utilizes a first voltage level;
- at least one second common voltage portion for coupling to a circuit that utilizes a second voltage level;
- a first electrostatic common portion for providing a discharge path;
- at least one first diode ring having one terminal coupling to the first electrostatic common portion and the other terminal coupling to the first common voltage portion;
- a second electrostatic common portion for providing another discharge path;
- at least one second diode ring having one terminal coupling to the second electrostatic common portion and the other terminal coupling to the second common voltage portion;
- and
- a third diode ring having one terminal coupling to the first electrostatic common portion and the other terminal coupling to the second electrostatic common portion.
5 more elements
Dependencies are inferred from the claim text.