Mobile terminal with electromagnetic actuator

Details Mobile terminal with electromagnetic actuator Mobile terminal with electromagnetic actuator

2006-04-25

2006-04-25

Pendleton, Brian T. (Department: 2644)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C412S026000

Reexamination Certificate

active

07035423

ABSTRACT:
This invention deals with a portable terminal that reduces extraneous tones in a portable terminal in which is mounted an electromagnetic induction actuator that produces voice signals, a buzzer signal or a low frequency vibration. By short-circuiting the terminal fittings of the electromagnetic induction actuator or by connecting them electrically to amplifiers or to a signal generator that produces a constant voltage signal or a constant-frequency signal, the extraneous tone produced by vibration of the mechanical vibration system of the actuator is reduced.

REFERENCES:
patent: 5828767 (1998-10-01), Button
patent: 6118613 (2000-09-01), Kojima
patent: 6725109 (2004-04-01), Hile et al.
patent: 3-39392 (1991-04-01), None

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