System for extending the effective operational range of an infra

Details System for extending the effective operational range of an infra System for extending the effective operational range of an infra

1986-12-24

1989-02-28

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455601, 455617, H04B 900

Patent

active

048093599

ABSTRACT:
A system for extending the effective operational range of an infrared remote control system of the type having a remote control unit with an infrared transmitter and a controlled device having an infrared receiver. The system includes a first repeater positioned physically in the area where the remote contol unit will be used. An infrared receiver is contained within the first repeater and generates an electrical output signal representative of the infrared signal received from the remote control unit. A radio transmitter at the first repeater then transmits a radio signal to a radio receiver at a second repeater which is physically adjacent the controlled device(s). The radio receiver generates a second electrical signal representative of the received radio signal and this second electrical signal activates an infrared transmitter which transmits an infrared signal to the controlled device(s).

REFERENCES:
patent: 3513443 (1970-05-01), Andersen
patent: 4149186 (1979-04-01), Chung et al.
patent: 4259746 (1981-03-01), Sandstedt
patent: 4264982 (1981-04-01), Sakarya
patent: 4394691 (1983-07-01), Amano et al.
patent: 4509211 (1985-04-01), Robbins
patent: 4622681 (1986-11-01), Snell et al.
patent: 4709412 (1987-11-01), Seymour

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