Title:
SLIP-DETECTING PHASE DETECTOR AND METHOD FOR IMPROVING PHASE-LOCK LOOP LOCK TIME
Document Type and Number:
WIPO Patent Application WO2001033828
Kind Code:
A3
Abstract:
An improved digital phase detector is provided for detecting and compensating for a cycle slip between a reference signal and a frequency source signal, the reference and frequency source signals each comprising pulses, each pulse defined by a leading edge and a trailing edge. The digital phase detector includes a detector circuit for detecting a cycle slip where two successive leading edges of one of the reference and frequency source signals are received before a leading edge of the other signal is received. An output circuit is operatively coupled to the detector circuit for developing a correction signal responsive to said detecting.
Inventors:
WHITE STEVEN L
KLEMMER NIKOLAUS
KLEMMER NIKOLAUS
Application Number:
PCT/US2000/028161
Publication Date:
February 14, 2002
Filing Date:
October 12, 2000
Export Citation:
Assignee:
ERICSSON INC (US)
International Classes:
H03D13/00; H03K5/26; H03L7/089; H03L7/183; (IPC1-7): H03L7/095
Foreign References:
| EP0716511A1 | 1996-06-12 | |||
| EP0572161A2 | 1993-12-01 | |||
| US5955928A | 1999-09-21 | |||
| US5180933A | 1993-01-19 | |||
| FR2703534A1 | 1994-10-07 | |||
| US5648744A | 1997-07-15 |
Download PDF: