Motorola Corporation

George W McClurg

John M Burgan

John M McKee

Charles W Mooney

Gary L Pace

Kenneth S Lerner

An electronic driver for use with linear and non-linear transducers includes a voltage controlled oscillator (1630) to generate an output signal (1603) in response to a frequency control signal (1625); a transducer driver (1604), coupled to the voltage controlled oscillator (1630) and to the transducer (600), includes an electromagnetic driver (604) to generate an electromagnetic field in response to the output signal (1603), and a power control circuit (2104, 2106) to suspend generation of the electromagnetic field for a portion of the output signal, the electromagnetic field generating movement of a magnetic motional mass (636) which is transformed into tactile energy; and a tactile energy monitor (1606) coupled to the electromagnetic driver (604) for monitoring a level of tactile energy generated by the movement of the magnetic motional mass (636), and in response thereto generates the frequency control signal (1625) to maximize the level of tactile energy generated.

Electronic driver for an electromagnetic resonant transducer

A data communication receiver (100) for operating in a demonstration mode comprises a receiving circuit (110) for receiving and decoding radio frequency signals, a battery (140) for powering the receiving circuit (110), and a display (150) for displaying information. A switch (142) coupled between the battery (140) and the receiving circuit (110) disconnects the receiving circuit (110) from the battery (140) to disable the receiving circuit (110) when a signal has been received indicating that the data communication receiver (100) is to operate in the demonstration mode. A demonstration element (165, 170) coupled to the display (150) provides at least one demonstration screen to the display (150) in response to the disabling of the receiving circuit (110).

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Boynton Beach, FL, United States of America

George W McClurg