Radio signal receiving apparatus with a security circuitry
AssigneeMotorola, Inc.
InventorGeorge Drapac
Life of this patent
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Abstract
A radio signal receiving apparatus such as a pager with a security circuitry includes operator-controlled switches for providing a plurality of different command signals which are used to actuate the receiving apparatus in a different mode of operation, an interface circuitry with an optional feature circuitry coupled to the receiving circuitry of the apparatus for providing various optional functions such as automatic reset, single/dual function or battery saving functions to the receiving apparatus, and a security circuitry for preventing the receiving apparatus from receiving the incoming signal once tampering of the optional feature security is detected.
Claims6
In a radio signal receiver having signal receiving circuitry for receiving an incoming signal, one or more built-in option circuits for enhancing receiver operation, and a plurality of operator-controlled switches for providing different operator-initiated command signals, the improvement comprising:
- option control circuitry coupled to the receiving circuitry for providing a plurality of predetermined control signals for enabling selected option circuits;
- an interface circuit coupled to the receiving circuitry and responsive to the operator-controlled switches for enabling the signal receiving circuitry;
- and
- security circuitry coupled to the option control circuitry for detecting unauthorized tampering of the option control circuitry and for inhibiting the interface circuit from enabling the signal receiving circuitry when such unauthorized tampering is detected.
Dependencies are inferred from the claim text.