Telecommunications – Receiver or analog modulated signal frequency converter – Noise or interference elimination
Reexamination Certificate
2011-01-04
2011-01-04
Nguyen, Duc (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Noise or interference elimination
C455S258000, C455S255000, C331S10800D, C331S034000, C331S137000
Reexamination Certificate
active
07865163
ABSTRACT:
A time constant automatic adjusting circuit comprises: a filter circuit varying a phase of an clock signal to be input so as to output the clock signal; a phase comparison circuit comparing a phase of an output signal of the filter circuit with the phase of the clock signal, and outputting a predetermined voltage when the phase of the output signal and the phase of the clock signal are the same; at least three comparators comparing the output voltage with a plurality of different voltages; an up-down counter counting a number of output bits of either one of the at least three different voltages in accordance with an output result of the comparators; and a control circuit varying the time constant of the filter circuit in accordance with the number of output bits counted by the up-down counter.
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Itakura Tetsuro
Ito Rui
Saigusa Shigehito
Watanabe Osamu
Chow Charles
Kabushiki Kaisha Toshiba
Nguyen Duc
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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