The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2000
Filed:
Jun. 29, 1998
Mark Leonard Buer, Gilbert, AZ (US);
VSLI Technology, Inc., San Jose, CA (US);
Abstract
A circuit on a detachable device, such as a plug-in card, determines when the detachable device has been disconnected from a host device. The circuit includes a node, a power source, a switch and a control circuit. The node is connected to ground when the detachable device is connected to the host device. The node is disconnected from ground when the detachable device is disconnected from the host device. The switch is for connecting and disconnecting the node to the power source. The control circuit is for, repeatedly at a predetermined interval of time while the detachable device remains connected to the host device, causing the switch to connect the node to the power source for a first length of time. The control circuit, at the end of the first length of time, checks a voltage level of the node in order to detect whether the detachable device has been disconnected from the host device.