Ask modulator and communication device using the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 18, 2001
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N/A
app pub date -
Apr 28, 2000
filing date -
Apr 28, 1999
priority date (Note) -
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Abstract
An ASK modulator can be operated with only a positive-voltage power source. A source-voltage switching circuit that applies a positive voltage to the source of a FET when a data signal is at an L level in relation to the source of the FET is connected to the source of the FET which has a negative pinch-off voltage. Since the L level of the data signal can be set to 0 V, the ASK modulator can be configured only with the positive-voltage power source. This allows miniaturization and cost reduction to be implemented.
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