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US 5,965,920 AGranted
Input protection circuit
AssigneeLG Semicon Co., Ltd.
InventorYang-Soo Sung
Life of this patent
Estimating the term…
Abstract
An input protection circuit which makes it possible to protect an internal circuit with respect to withstanding an electro-static charge by forming multiple discharge loops by connecting each input pad via an input protection circuit. The circuit includes a plurality of pads formed on a P well within a substrate, first discharge paths formed between neighboring pads, and a second discharge path formed between the pads and circuit ground.
Claims15
An input protection circuit, comprising:
- a plurality of pads formed on a first conductive well in a substrate;
- first discharge paths formed between neighboring ones of the pads;
- and
- a second discharge path formed between the pads and a ground voltage, wherein an electro-static charge applied through said pads is discharged through a diode connected in series between said first conductive well and a ground electrode.
1 more element
An input protection circuit, comprising:
- a first conductive well formed in a semiconductor substrate;
- a plurality of pads formed on the first conductive well;
- bipolar transistors formed between the neighboring pads;
- and
- a diode formed between the first conductive well and a ground electrode, wherein said diode is formed in said first conductive well and is formed through a ground electrode contacting with a second conductive well and said first conductive well.
2 more elements
Dependencies are inferred from the claim text.