Pulse or digital communications – Pulse position – frequency – or spacing modulation
Reexamination Certificate
2006-10-03
2006-10-03
Bayard, Emmanuel (Department: 2611)
Pulse or digital communications
Pulse position, frequency, or spacing modulation
Reexamination Certificate
active
07116709
ABSTRACT:
The code system is realized by that a plurality of waveforms A and B each having duty ratios of 50% in which only any one of a rising edge and a falling edge is present are combined with each other, and “1” and “0” are allocated to the combined waveform. In accordance with the present invention, both a clock and data can be transmitted at the same time, and can be readily demodulated without using a complex PLL circuit. As a trial manufacture according to the present invention, the demodulator could be realized which could allow variations contained in an input frequency by more than 1 digit under operating voltage of 2 V. The effectiveness of this patent could be confirmed.
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Furukawa Katsuhiro
Ishifuji Tomoaki
Nagai Kenji
Tanaka Satoshi
Bayard Emmanuel
Hitachi , Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
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