Telecommunications – Transmitter and receiver at separate stations – Having diverse art device
Patent
1996-04-17
1998-02-24
Vo, Nguyen
Telecommunications
Transmitter and receiver at separate stations
Having diverse art device
455 42, 455344, H04B 700
Patent
active
057220506
ABSTRACT:
A transmitter-receiver system including a transmitter unit installed in an audio equipment, and a receiver unit installed in an earphone, wherein the transmitter unit includes an automatic electric level regulator to regulate the electric level of the output signal of audio equipment to a predetermined range, a power control circuit controlled by the output signal of the audio equipment to provide the necessary working voltage, and an inductance antenna to transmit output signal from the audio equipment to the receiver unit; the receiver unit is of low working voltage design, including an automatic 24-time frequency divider circuit to effectively discriminate left and right sound tracks, and an auto-shut off circuit to automatically cut off power supply when the audio equipment does no work; the transmitter unit and the receiver unit further use a respective dual oscillation frequency regulating circuit consisting of an oscillating transistor, a dielectric resonator, and two variable resistors for regulating the range of the frequency.
REFERENCES:
patent: 5553312 (1996-09-01), Gattey et al.
Casey, Esq. Donald C.
Vo Nguyen
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