H - Electricity – 04 – M
Patent
H - Electricity
04
M
379/74
H04M 17/00 (2006.01) H03D 3/24 (2006.01) H03L 7/095 (2006.01) H03B 19/16 (2006.01)
Patent
CA 2038585
ABSTRACT A designated burst signal specified in a designated frequency is detected from an all-inclusive signal specified in a number of different frequencies. The frequency of the all- inclusive signal is first multiplied by a multiplying factor so as to produce a multiplied output signal. Then a phase-lock loop operation is performed between the multiplied output signal and an oscillated signal produced for performing the phase-lock loop operation and specified in a multiplied frequency of the designated frequency by the multiplying factor. This produces a phase-lock output signal and which is then compared with the multiplied out- put signal to produce a detected output signal representing whether the designated burst signal is in the all-inclusive signal.
Fetherstonhaugh & Co.
Fujitsu Limited
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