Transponder system including an oscillator ripple counter contro

Details Transponder system including an oscillator ripple counter contro Transponder system including an oscillator ripple counter contro

1977-11-25

1980-05-13

Pitts, Harold I.

Communications: electrical

Digital comparator systems

340618, G08C 1916, H04Q 914

Patent

active

042030900

ABSTRACT:
A "red-alert" end condition digital signal is generated by a transponder system of the present invention formed essentially of MSI's (Medium Scale Integrated Chips) including an oscillator/ripple counter controlling a coded analog multiplexer network in circuit with a RTL compatible gate/driver circuit. The aforementioned system both is initiated by and is in power dependent relationship with a MARK-SPACE interrogation signal and has special utility in digitally monitoring product "overflow" conditions in source/product storage tank networks associated with an oil refinery and/or a chemical complex.

REFERENCES:
patent: 4023140 (1977-05-01), Siems
patent: 4027286 (1977-05-01), Marosko
patent: 4044351 (1977-08-01), Everson
patent: 4067008 (1978-01-01), Sprowls, III
patent: 4072923 (1978-02-01), Siems

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