Pulse or digital communications – Receivers – Automatic frequency control
Patent
1997-05-29
1999-03-30
Chin, Stephen
Pulse or digital communications
Receivers
Automatic frequency control
375326, 375327, 375371, 375373, 375374, 375376, 455343, H04L 2706, H04L 2714, H04L 2716, H04L 2722
Patent
active
058898247
ABSTRACT:
In an intermittent receiving apparatus (10) for intermittently receiving a carrier signal having a carrier frequency (f.sub.R) and carrying data as an intermittent received carrier signal so as to alternate between a reception state for a reception time interval (T.sub.R) and a nonreception state for a nonreception time interval (T.sub.NR), an oscillation circuit (16) oscillates a reference signal having a reference frequency (f.sub.REF) equal to the reproduced clock frequency (F.sub.BTR). A clock supply circuit (20) intermittently supplies an output clock signal for a predetermined time duration including the reception time interval to a clock reproduction circuit (15) on the basis of the reference signal.
REFERENCES:
patent: 5402446 (1995-03-01), Minami
patent: 5500878 (1996-03-01), Iwasaki
patent: 5541929 (1996-07-01), Jokura
patent: 5594735 (1997-01-01), Jokura
patent: 5633898 (1997-05-01), Kishigami et al.
Japanese Office Action dated Apr. 28, 1998 with English language translation of Japanese Examiner's comments.
Chin Stephen
Maddox Michael W.
NEC Corporation
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