Abstract: A wireless communication circuit and a transport device for sending rescue message are provided. The wireless communication circuit is arranged in a transport device for sending a rescue message to a cellular network and includes a radio transceiver, a signal amplifier circuit, a plurality of filters, and a first switch. The radio transceiver converts a baseband signal to a radio frequency signal and determines whether the cellular network has been connected. The first switch includes an input end and a plurality of output ends, and is electrically connected between the signal amplifier circuit and the plurality of filters. The first switch connects the input end and one of the plurality of output ends in sequence until the radio transceiver determines the cellular network has been connected. The wireless radio transceiver sends the rescue message through the first switch.

Abstract: A low power redundancy circuit that has applications in CMOS memories. This circuit employs fuses to select addressing paths and to provide address information of failing memory columns. Path selection is made by rendering a fuse device non-conductive which disconnects a clamping off bias that inhibits conduction through an N-channel transistor and preventing signal flow through the selected addressing paths to the output. Memory column addressing information is generated by selectively rendering a second set of fuses conductive or non-conductive to produce a logical one or zero respectively at the output of the addressing paths. A redundant signal is used to precondition the select circuitry and prevent a transient pulse from propagating through the output of the select circuitry when a section is not activated. The circuit uses CMOS N-channel transistors configured such as to produce low standby power while being able to deliver necessary output signals when path selection is made.