Ultrasonic television remote control system

Details Ultrasonic television remote control system Ultrasonic television remote control system

1976-12-16

1978-09-12

Richardson, Robert L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

325 30, 340171PF, H04B 700

Patent

active

041140990

ABSTRACT:
A binary coded signal represented by sequential transmission of two frequencies, comprising means to determine if the frequency of the received signal is below or above a reference frequency generated within the receiver, means for recognizing a change in input frequency relative to the reference as start and end of bit intervals, means to establish if individual bits are of a "one" or "zero" level, means for converting the serial bits to a parallel digital word and means for storing this word indefinitely in the event the received data is a valid signal.

REFERENCES:
patent: 3747108 (1973-07-01), Ringer
patent: 3823385 (1974-07-01), Kitamura

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