Pulse or digital communications – Transceivers – Loopback mode
Reexamination Certificate
2007-09-26
2011-10-18
Ha, Dac (Department: 2611)
Pulse or digital communications
Transceivers
Loopback mode
C714S704000
Reexamination Certificate
active
08040940
ABSTRACT:
A transmitter/receiver device includes: a transmitter unit including a parallel/serial converting circuit, a waveform deteriorating circuit, and a transmitter circuit; and a receiver unit including a receiver circuit, a serial/parallel converting circuit, and an error detecting circuit. The parallel/serial converting circuit converts a transmitter-side parallel signal to a transmitter-side serial signal. The waveform deteriorating circuit deteriorates a signal waveform of the transmitter-side serial signal. The transmitter circuit transmits to the receiver unit the signal whose waveform is deteriorated. The receiver circuit receives, as a receiver-side serial signal, the signal transmitted from the transmitter circuit. The serial/parallel converting circuit converts the receiver-side serial signal to a receiver-side parallel signal. The error detecting circuit detects a bit error rate of the receiver-side parallel signal.
REFERENCES:
patent: 2008/0025383 (2008-01-01), Li
patent: 1605619 (2005-12-01), None
patent: 2004340940 (2004-12-01), None
patent: A-2004-340940 (2004-12-01), None
Kotaro Goto et al., “Ultra-High-Speed CMOS Interface Technology,” Journal FUJITSU.55, 6, pp. 548-552.
Arent & Fox LLP
Fujitsu Semiconductor Limited
Ha Dac
Stevens Brian J
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