Attenuation-modulation circuit for generating electronic bell so

Details Attenuation-modulation circuit for generating electronic bell so Attenuation-modulation circuit for generating electronic bell so

1982-10-28

1984-07-03

Roskoski, Bernard

Horology: time measuring systems or devices

Signalling means

Musical

84 124, 368 72, G04B 2100

Patent

active

044576315

ABSTRACT:
An electronic bell sound generating circuit for a timepiece for generating a sound simulating a bell sound produced by a motor driven bell-striking system. The circuit includes an audio frequency signal generating circuit, an optional number of attenuation-modulation circuits, an alarm trigger circuit, an attenuation control circuit and a sound generating circuit. The audio frequency generating circuit includes a reference signal generator and a frequency dividing circuit. The attenuation-modulation circuit includes MOS transistors connected in parallel and gate circuits connected to gates of the MOS transistors. The attenuation control circuit includes shift registers comprising flip-flops connected in series. The circuit works to stepwisely increase the combined on-operation resistance of the MOS transistors to thereby decrease the value of the current of audio frequency signals to the sound generating circuit in order to obtain an attenuated sound. When two or more attenuation-modulation circuits are provided, different audio frequencies are supplied to each respectively and the output signals from the respective attenuation-modulation circuits are superposed in the sound generating circuit. The time cycle for stepwise decrease of the current value of the audio frequency signals is set at 0.0625 seconds.

REFERENCES:
patent: 4046047 (1977-09-01), Roberts
patent: 4056033 (1977-11-01), Inoue et al.
patent: 4173915 (1979-11-01), Gross
patent: 4175465 (1979-11-01), Schmoll
patent: 4273019 (1981-06-01), Goto

Affiliated with

Also associated with

Rating

Attenuation-modulation circuit for generating electronic bell so does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Attenuation-modulation circuit for generating electronic bell so, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Attenuation-modulation circuit for generating electronic bell so will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1628244