Patent Number: 6,297,678

Title: Circuit for rapidly charging a system net

Abstract: An electronic system, precharge circuit, and method for precharging system net. The system includes a plurality of devices. Each of the devices includes at least one I/O pin driven by an driver circuit. The system further includes a system net connected to at least one of the I/O pins of each of the plurality of devices. A precharge circuit suitable for connecting to the system net is provided. The precharge circuit includes a sense stage and a charging stage. The sense stage is configured to receive the system net voltage as an input and adapted to sense a system net voltage transition. The charging stage is connected to the system net and configured to receive an output of the sense stage. The sense stage is configured to activate the charging stage in response to detecting a system net voltage transition. The charging stage, upon activation, is configured to provide a current path between a supply voltage and the system net for a specified duration. After the specified duration, the current path is disabled.

Inventors: Gholami; Ghadir Robert (Austin, TX)

Assignee: International Business Machines Corporation

International Classification: H03K 19/094 (20060101); H03K 19/017 (20060101); H03K 19/01 (20060101); H03K 003/02 ()

Expiration Date: 10/02/2018