Solid state alarm for clock-radio

Details Solid state alarm for clock-radio Solid state alarm for clock-radio

H - Electricity

04

B

325/78

H04B 1/16 (2006.01) G04G 13/00 (2006.01)

Patent

CA 1116243

SOLID STATE ALARM FOR CLOCK-RADIO ABSTRACT OF THE DISCLOSURE A circuit provides a ramp voltage for purposes of controlling simultaneously a pair of transistors from saturation to cutoff and vice versa. Means are provided for generating an electronic strike and chime tone which is connected both to an amplifier circuit and the transistor controlled to cutoff. A tuner circuit which is part of the radio to provide a radio tone likewise is connected both to the amplifier and the transistor controlled to saturation. The circuit is provided with an enabling input at an alarm time and by dissipating the tones by varying percentages as the transistors change their state, a crescendo-decrescendo action may be obtained.

298584

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