Communications: electrical – Continuously variable indicating – With meter reading
Patent
1983-10-11
1985-10-22
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
340310A, 331108D, 331179, 315312, H04Q 900
Patent
active
045491780
ABSTRACT:
A transmitter circuit adapted to transmit control signals to receivers which in turn activate fluorescent lamp fixtures. The transmitter comprises a frequency controllable oscillator and means coupled from the oscillator for providing alternating cycle control signals adapted to control the drive of the load. A divider circuit is used responsive to the oscillator frequency for providing a divided frequency signal of lower frequency of that of the oscillator. Feedback means including biphase means is responsive to the divided frequency signal and is coupled to the oscillator for controlling the oscillating frequency thereof. The oscillator output frequency is switchable at the divided frequency signal rate from a first frequency to a second frequency under control from the divider circuit. There is preferrably also provided frequency modulation control of the oscillator and in this regard the output of the divider circuit couples by way of a frequency modulation wave shape circuit to the frequency modulation input of the frequency controllable oscillator. Zero crossing detecting circuitry is also provided to reduce power consumption.
REFERENCES:
patent: 3613025 (1971-10-01), Joosten, Jr.
patent: 4309675 (1982-01-01), Rabe
patent: 4320357 (1982-03-01), Wulfsberg et al.
Bessone Carlo S.
Buffton Thomas H.
GTE Products Corporation
Yusko Donald J.
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