Input/output interface connector circuit for repowering and isolation
Circuit card with soft power switch
Printed circuit board connection system
Device for indicating the position of printed circuit cards relative to their connectors
Electronic board identification
Electronic card connecting circuit
Method and apparatus for controlled removal and insertion of circuit modules
Multi-board system having electronic keying and preventing power to improperly connected plug-in board with improperly configured diode connections
System for computer peripheral bus for allowing hot extraction on insertion without disrupting adjacent devices Patent #: 5210855
ApplicationNo. 083504 filed on 06/30/1993
US Classes:361/58, Impedance insertion323/908, INRUSH CURRENT LIMITERS710/302, Hot insertion713/300COMPUTER POWER CONTROL
ExaminersPrimary: DeBoer, Todd E.
Attorney, Agent or Firm
Foreign Patent References
International ClassH02H 009/00
AbstractA method of connecting an IC card to a motherboard involves first connecting the ground busses, then the power busses and finally the general signal busses. When the power busses are connected, a low current is allowed to flow initially, then, a predetermined period of time is allowed to elapse for equalization of IC card and motherboard voltages, then a full current is allowed to flow. A method of disconnecting an IC card from a motherboard involves first disconnecting the general signal busses, then the power busses and finally the ground busses.