公开(公告)号：US20030134609A1

公开(公告)日：2003-07-17

申请号：US10331276

申请日：2002-12-30

Applicant: U.S. PHILIPS CORPORATION

Inventor： Wolfdietrich G. Kasperkovitz ,  Cicero S. Vaucher

IPC: H04B001/06 ,  H04B007/00

CPC classification number: H03J1/005 ,  H03L7/187 ,  H03L7/23

Abstract: In a receiver, a frequency-synthesis circuit (SYNTH) generates a stepped-frequency signal (Ssf) having a frequency which can be varied in steps. A synchronization circuit (LOOP) synchronizes a tuning oscillator (LO) with the stepped-frequency signal (Ssf). It provides an integer frequency-relationship between the stepped-frequency signal (Ssf) and the tuning oscillator (LO). That is, if the stepped-frequency signal (Ssf) has a frequency Fsf, the tuning oscillator (LO) will operate at a frequency FlonullNnullFsf, N being an integer or an integer fraction.