초록 ▼

A wireless modem employs a radio frequency (RF) transponder system components to remotely access the memory of an electrical or electro-mechanical device by providing an exciter/reader/writer (ERW) circuit free of electrical contact with the electrical or electro-mechanical device and a transponder

A wireless modem employs a radio frequency (RF) transponder system components to remotely access the memory of an electrical or electro-mechanical device by providing an exciter/reader/writer (ERW) circuit free of electrical contact with the electrical or electro-mechanical device and a transponder including a transmit/receive antenna, a reading circuit, a programming circuit, and a transponder memory. The transponder memory is directly connected to the device memory. The ERW circuit initially generates an RF excitation signal powering the transponder. In response to the RF excitation signal, the transponder generates a RF response signal using the reading circuit that is transmitted back to the EWR circuit. The RF response signal includes data from the device memory. The RF response signal is received by the ERW circuit, which in turn generates an RF write signal that is transmitted to the transponder. The RF write signal powers the transponder and programs the device memory using the programming circuit of the transponder.

대표청구항 ▼

[ We claim:] [1.] A communication system comprising:a host device including an electrically powered host processor for controlling operation of said host device and a host memory coupled to said host processor for storing host data relating to a condition of said host device, wherein said host proce

[ We claim:] [1.] A communication system comprising:a host device including an electrically powered host processor for controlling operation of said host device and a host memory coupled to said host processor for storing host data relating to a condition of said host device, wherein said host processor has an operable state requiring electrical power from a power source and said host memory is controlled by said host processor in said operable state, and further wherein said host processor has an inoperable state in the absence of electrical power from said power source or during a malfunction of said host device and control of said host memory by said host processor is absent in said inoperable state;an exciter/reader remotely positioned relative to said host device and free of electrical contact with said host device, said exciter/reader having an RF excitation signal generator for generating an RF excitation signal, an RF excitation signal transmitter coupled to said RF excitation signal generator for transmitting said RF excitation signal, an RF response signal receiver for receiving an RF response signal, and an RF response signal reader coupled to said RF response signal receiver for reading said RF response signal; anda transponder in electrical contact with said host memory, free of electrical contact with said exciter/reader and remotely positioned in RF contact with said exciter/reader, said transponder having an RF excitation signal receiver for receiving said RF excitation signal, an RF response signal generator coupled to said host memory for reading said host data from said host memory in the absence of control by said host processor in said inoperable state and generating said RF response signal, including said host data, and an RF response signal transmitter coupled to said RF response signal generator for transmitting said RF response signal to said RF response signal receiver, wherein said RF response signal reader reads said host data.