Computer graphics processing and selective visual display system – Display peripheral interface input device
Reexamination Certificate
2006-12-26
2006-12-26
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
C345S163000
Reexamination Certificate
active
07154470
ABSTRACT:
An amplitude modulator circuit includes a reference oscillator and an envelope modulator coupled to the reference oscillator for receiving a reference signal. A microcontroller is coupled to the envelope modulator for providing an envelope signal to the envelope modulator and a low pass filter is coupled to the envelope modulator for receiving a modulated command from the envelope modulator. An inverter is coupled to the low pass filter for receiving a low passed envelope modulated signal from the low pass filter and a transducer or amplifier is coupled to the inverter and the low pass filter for receiving an inverted low passed signal and the low passed envelope modulated signal.
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Immersion Corporation
Lesperance Jean
Ritchie David B.
Thelen Reid & Priest LLP
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