Circuit allowing insertion/extraction of a board in a system during normal operation

摘要

This invention relates to a circuit allowing insertion and extraction of a board in the system during normal operation. The circuit includes a monitoring circuit detecting the voltage of the board itself, a bilateral buffer and a means to enable and disable bilateral buffer according to the output of the monitoring circuit. In the circuit, when the detected voltage is over a predetermined level, board reset timing is regulated variably so as for the board to reset normally prior to enabling the buffer.