TRANSPONDER SYSTEM INCLUDING AN OSCILLATOR RIPPLE COUNTER CONTROLLING A CODED ANALOG MULTIPLEX NETWORK IN A CIRCUIT WITH A DRIVER/GATE CIRCUIT FOR GENERATING RED-ALERT END CONDITION DIGITAL SIGNALS IN A STORAGE TANK

摘要

TRANSPONDER SYSTEM INCLUDING AN OSCILLATOR RIPPLE COUNTERCONTROLLING A CODED ANALOG MULTIPLEX NETWORKIN A CIRCUIT WITH A DRIVER/GATE CIRCUIT FORGENERATING "RED-ALERT" END CONDITION DIGITALSIGNALS IN A STORAGE TANK GAUGING SYSTEMABSTRACT OF THE DISCLOSUREA "red-alert" end condition digital signal isgenerated by a transponder system of the present inventionformed essentially of MSI's (Medium Scale Integrated Chips)including an oscillator/ripple counter controlling a codedanalog multiplexer network in circuit with a RTL compatiblegate/driver circuit. The aforementioned system both isinitiated by and is in power dependent relationship with aMARK-SPACE interrogation signal and has special utility indigitally monitoring product "overflow" conditions in source/product storage tank networks associated with an oil refineryand/or a chemical complex.