초록 ▼

A redundant power bus arrangement for electronic circuits controls the application of voltage from a power source to an active circuit card and a standby circuit card. Current limited switches are used to connect the power source to the active or standby circuits. A switch control circuit controls t

A redundant power bus arrangement for electronic circuits controls the application of voltage from a power source to an active circuit card and a standby circuit card. Current limited switches are used to connect the power source to the active or standby circuits. A switch control circuit controls the conductive state of the current limited switches in response to a control signal generated by at least one of the controlled circuits. The maximum current permitted by each of the current limited switches is less than the maximum output current rating of the power source, thereby preventing a short on a power bus within one of the controlled circuits from affecting the voltage available for the other controlled circuit.

대표청구항 ▼

A redundant power bus arrangement for electronic circuits comprising: an active circuit to be controlled; a standby circuit to be controlled; a power source; a first current limited switch for connecting said power source to said active circuit; a second current limited switch for connecting said po

A redundant power bus arrangement for electronic circuits comprising: an active circuit to be controlled; a standby circuit to be controlled; a power source; a first current limited switch for connecting said power source to said active circuit; a second current limited switch for connecting said power source to said standby circuit; wherein the maximum current permitted by each of said first and second current limited switches is less than the maximum output current rating of said power source; and a switch control circuit for controlling the conductive state of said first and second current limited switches in response to a control signal generated by at least one of said circuits to be controlled; wherein each of said current limited switches includes a field effect transistor having a source terminal connected to a power bus which receives power from said power source, a drain terminal connected to one of said circuits to be controlled, and a gate terminal; a first resistor connected between said source and gate terminals; a second resistor connected between said gate terminal and said switch control circuit; and a capacitor connected between said gate terminal and either ground or a bus voltage.