Data transmission controller and sampling frequency converter

Details Data transmission controller and sampling frequency converter Data transmission controller and sampling frequency converter

2006-02-15

2009-08-04

Phu, Phuong (Department: 2611)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C375S371000, C375S373000, C375S376000, C710S053000, C710S052000, C710S060000, C710S061000

Reexamination Certificate

active

07570727

ABSTRACT:
In a data transmission controller apparatus, a first-in first-out storage stores newly inputted data in response to a write request signal, and reads and outputs the stored data which has been stored earliest in response to a read request signal. A remaining data amount detection portion detects a remaining data amount of the stored data which remain in the first-in first-out storage. A variable frequency oscillating portion generates an enable signal at a time rate according to frequency control information so as to enable generation of the write request signal or read request signal. A frequency control portion corrects the frequency control information so as to return the remaining data amount to an appropriate value when the remaining data amount detected by the remaining data amount detection portion varies away from the appropriate value toward an upper limit value or varies away from the appropriate value toward a lower limit value.

REFERENCES:
patent: 6263036 (2001-07-01), Yamamoto et al.
patent: 7450678 (2008-11-01), Nishioka
patent: 11-055075 (1999-02-01), None

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