Radio frequency transmitter capable of sensing abnormal state fo

Details Radio frequency transmitter capable of sensing abnormal state fo Radio frequency transmitter capable of sensing abnormal state fo

1989-11-03

1993-08-24

Kuntz, Curtis

Telecommunications

Transmitter

Measuring, testing, or monitoring of transmitter

455127, H04B 104

Patent

active

052396924

ABSTRACT:
There is disclosed a radio frequency transmitter for use in a wireless security system, which can sense abnormal state occurred in an objective equipment, by monitoring both the abnormal state and voltage supplied thereto. The invention also transmits the radio frequency for a given short period so as to save the power. The transmitter for carrying out those objects includes an address unit 110 for designating a specific address having a plurality of bits according to each objective equipment; an encoder 120 for coding each bit of the specific address which is designated when an abnormal state is occurred and producing a specific code data in series; an RF transmitter 130 for modulating said specific code data into a radio frequency in form of analog signal and amplifying said data to be suitable for transmitting; a sensor 100 for sensing the abnormal state occurred to the objective equipment; a power source sensor 140 for sensing a state of battery supplying voltage source to the entire system, and providing a logic data to the encoder in response to the state of the battery; a system driver 150 for driving the radio frequency transmitter and the encoder in response to the output data of the sensor and the power source sensor; and a driving controller 160 for restricting within a given period the transmission of the radio frequency when the abnormal state is detected.

REFERENCES:
patent: 4521912 (1985-06-01), Franke et al.
patent: 4649569 (1987-03-01), Kennon et al.
patent: 4924211 (1990-05-01), Davies

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