Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1991-11-13
1994-02-22
Chin, Stephen
Pulse or digital communications
Spread spectrum
Direct sequence
375 81, 375110, 348472, 348525, H03D 324
Patent
active
052895084
ABSTRACT:
A clock information transmitting device coupled to a digital processing circuit which receives a transmission signal and generates a coded transmission signal includes a PLL circuit for generating a first signal and a sampling clock signal, both being synchronized with a synchronizing signal in the transmission signal. The sampling clock signal is used in the digital processing circuit. A clock information generating part counts pulses of a transmission clock signal and generates clock information indicating a number of pulses of a transmission clock signal in response to one of the synchronizing signal and the first signal generated by the PLL circuit. A multiplexer outputs a multiplexed signal including the clock information and the coded transmission signal to a transmission path.
REFERENCES:
patent: 3971888 (1976-07-01), Ching et al.
patent: 4127866 (1978-11-01), Yamashita
patent: 4727432 (1988-02-01), Hosaka
patent: 4853781 (1989-08-01), Okano et al.
patent: 4956707 (1990-09-01), Oakley et al.
Wada Yoshiyuki
Yamanaka Toshihiro
Chin Stephen
Fujitsu Limited
Vo Don N.
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