Receiving device, semiconductor integrated circuit,...

Details Receiving device, semiconductor integrated circuit,... Receiving device, semiconductor integrated circuit,...

2005-08-29

2008-10-14

Nguyen, Simon D (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

C455S226200, C455S343200, C455S574000, C340S007320

Reexamination Certificate

active

07437132

ABSTRACT:
A receiving device includes a receiver circuit for outputting a received signal as a reception electric field intensity signal, an operation control circuit for controlling an operation of the receiver circuit, and an intermittent reception control circuit for outputting a periodic signal. A comparator circuit holds a first threshold indicating that the receiving device has entered a communication area and a second threshold indicating a start of a continuous electric field intensity measurement. If the reception electric field intensity signal is lower than the second threshold, the operation control circuit makes the receiver circuit perform intermittent operation. If the reception electric field intensity signal is equal to or higher than the second threshold, the operation control circuit makes the receiver circuit perform a continuous operation. If the reception electric field intensity signal is equal to or higher than the first threshold, the operation control circuit makes the demodulation circuit perform an operation.

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European Search Report Issued in corresponding European Patent Application No. EP 05 01 8529, dated Sep. 27, 2006.

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