Radio card communication apparatus

Details Radio card communication apparatus Radio card communication apparatus

1995-12-27

1998-12-08

Holloway, III, Edwin C.

Communications: electrical

Continuously variable indicating

With meter reading

34082534, H04Q 700

Patent

active

058476628

ABSTRACT:
A read request signal containing a command, an address, etc. is subjected to two-phase modulation with the first carrier of a first frequency and the resultant signal is then transmitted to a radio card. After the transmission of the read request signal, the first carrier is kept transmitted to the radio card. Upon reception of the read request signal, the radio card generates a power supply voltage and an operation clock and sends response data to the read request signal to a radio card reader/writer. Unlike in the prior art, therefore, the reception of power or the reception/transmission of data need not be performed intermittently so that a large amount of data can be received or transmitted continuously at a high speed.

REFERENCES:
patent: 4068232 (1978-01-01), Meyers
patent: 4546241 (1985-10-01), Walton
patent: 4691202 (1987-09-01), Denne et al.
patent: 4730188 (1988-03-01), Milheiser
patent: 4864292 (1989-09-01), Nieuwkoop
patent: 5280267 (1994-01-01), Reggiani

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