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US 3,931,577 AGranted
Radio receiver protection arrangement
AssigneeAmalgamated Wireless (Australia) Limited
InventorRobert Leigh Barnett
Life of this patent
Estimating the term…
Abstract
A receiver protection arrangement in which a voltage dependent on aerial voltage and a voltage dependent on aerial current are aggregated and applied to means responsive to a predetermined aggregate level to effectively short circuit the aerial lead. Additional means may be provided to dissipate energy in the input stage of a protected receiver to cause a reduced impedance to be reflected across the output of the protective arrangement.
Claims5
A radio receiver protection arrangement comprising:
- an aerial input terminal;
- an output terminal adapted to be coupled to the input of a radio receiver;
- an aerial lead connected between said input and output terminals;
- rectifier means connected to said aerial lead for providing a first unidirectional signal representative of peak voltage on said aerial lead;
- rectifier means coupled to said aerial lead for providing a second unidirectional signal representative of current through said aerial lead;
- means for combining said first and second signals to form a third signal representative of the aggregate levels of said first and second signals;
- an electronic switch connected between said aerial lead and ground;
- and
- means responsive to said third signal for closing said electronic switch to shunt said input signal therethrough at a predetermined level of said third signal.
6 more elements
Dependencies are inferred from the claim text.