Pulse density modulation circuit (parallel to serial) comparing in a nonsequential bit order

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United States of America Patent

PATENT NO 5337338
SERIAL NO

08011618

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A pulse density modulation circuit has a counter which produces a most significant bit through a least significant bit output based on a clock input. The circuit also has a comparator with two sets of most significant bit through least significant bit inputs that produces an output based on a comparison of the two sets of inputs. The first set of comparator most significant bit through least significant bit inputs receives respectively a most significant bit through a least significant bit of an input reference signal. The second set of comparator most significant bit through least significant bit inputs receives the counter most significant bit through least significant bit output in a non-sequential bit order. The non-sequential bit order can be a bit reversed order wherein the counter most significant bit through least significant bit output are respectively connected to the comparator least significant bit through most significant bit input. The circuit may further filter the comparator output to provide a resultant analog output signal.

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Patent Owner(s)

  • QUALCOMM INCORPORATED

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gregory, Sherman San Diego, CA 4 253
Sutton, Todd San Diego, CA 36 837
Waltman, Joan T San Diego, CA 13 311
White, Katherine W San Diego, CA 7 608

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