Asynchronous communication circuit

Details Asynchronous communication circuit Asynchronous communication circuit

2008-05-06

2008-05-06

Payne, David C. (Department: 2611)

Pulse or digital communications

Synchronizers

Frequency or phase control using synchronizing signal

Reexamination Certificate

active

10874178

ABSTRACT:
A counter value of a divider counter3that determines a communication speed is compared by a comparator4with a value calculated from a difference between fall delay and rise delay, and data is received with a matching signal serving as a data reception shift clock (S201), thereby acquiring receive data on the optimum position. Further, with the data reception shift clock (S201) serving as a data transmission shift clock (S201), the transmission control circuit5transmits serial data (S203) from the data transmission shift register7as data with a duty ratio reversed from a varied duty ratio of the communication system. Thus, it is possible to transmit data with a normal duty ratio to another communication device.

REFERENCES:
patent: 4713702 (1987-12-01), Ishihara et al.
patent: 5363418 (1994-11-01), Nakano et al.
patent: 6016309 (2000-01-01), Benayoun et al.
patent: 6380778 (2002-04-01), Uehara et al.

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