EP 1095458 A1 20010502 - SYSTEM FOR GENERATING AN ACCURATE LOW-NOISE PERIODIC SIGNAL
Title (en)
SYSTEM FOR GENERATING AN ACCURATE LOW-NOISE PERIODIC SIGNAL
Title (de)
SYSTEM ZUR ERZEUGUNG EINES GENAUEN RAUSCHARMEN PERIODISCHEN SIGNALS
Title (fr)
SYSTEME DE PRODUCTION D'UN SIGNAL PERIODIQUE PRECIS A FAIBLE BRUIT
Publication
Application
Priority
- US 9914655 W 19990629
- US 10786898 A 19980630
Abstract (en)
[origin: WO0001072A1] In the illustrative embodiment, the inventive system includes a low-bit digital-to-analog converter (68) for converting a first signal at a reference frequency to a digital signal. A delta-sigma converter is included for suppressing noise in the digital signal within the predetermined range of the reference frequency and providing a noise-shaped signal in response thereto. A bandpass filter (72) filters out the out-of-band noise and provides an accurate periodic signal which lacks glitch noise. In a particular embodiment, the inventive system further includes a direct digital synthesizer (42) for providing the first signal at the first frequency and the accurate reference periodic signal is supplied as reference signal to a phase-locked loop (50).
IPC 1-7
IPC 8 full level
H03M 3/02 (2006.01); H03L 7/08 (2006.01); H03L 7/18 (2006.01); H03L 7/197 (2006.01); H04B 14/06 (2006.01)
CPC (source: EP)
H03L 7/1806 (2013.01)
Citation (search report)
See references of WO 0001072A1
Designated contracting state (EPC)
DE FI FR GB SE
DOCDB simple family (publication)
WO 0001072 A1 20000106; AU 4726099 A 20000117; BR 9911733 A 20010403; CA 2336383 A1 20000106; CN 1308789 A 20010815; EP 1095458 A1 20010502; JP 2002519924 A 20020702
DOCDB simple family (application)
US 9914655 W 19990629; AU 4726099 A 19990629; BR 9911733 A 19990629; CA 2336383 A 19990629; CN 99808183 A 19990629; EP 99930808 A 19990629; JP 2000557550 A 19990629