Transponder and interrogator

Communications: electrical – Continuously variable indicating – With meter reading

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Details

34082569, 34082572, H04Q 100

Patent

active

049317881

ABSTRACT:
A transponder, comprising means for receiving a periodically modulated interrogating signal; means for demodulating the received signal to produce a periodic baseband signal; and means for transmitting data at a rate determined by the periodicity of the baseband signal.

REFERENCES:
patent: 3798642 (1974-03-01), Augenblick et al.
patent: 4370653 (1983-01-01), Crowley
patent: 4388524 (1983-06-01), Walton
patent: 4399437 (1983-08-01), Falck et al.
patent: 4631708 (1984-12-01), Wood et al.
patent: 4642573 (1987-02-01), Noda et al.
patent: 4654658 (1987-03-01), Walton
patent: 4730188 (1988-09-01), Milhuser
Lathi, B. P., "Modern Digital and Analog Communications Systems", 1983 section 4.12, p. 285.

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