SKYWORKS射频PCB设计指南PREPARED BY:Wing DjenAPPROVALS:5211 California Avenue, Irvine, CA 92617REVISION: 0.1 DATE 08/26/2005 PAGE 1 OF 6PROPRIETARY INFORMATION NO DISSEMINATION OR USE ALLOWED WITHOUT PRIOR WRITTEN PERMISSION TITLE:TYPE OF DOCUMENT:Layout Guidelines for the SKY74137 and SKY77331SKYWORKS SOLUTIONS, INC. PROPRIETARY INFORMATIONSKY74137 Control Registers Preliminary 02/02/05 PAGE 2 OF 61. Introduction:This document provides layout guidelines for the SKY74137 EDGE transceiver and SKY77331 EDGE PA.2. Layout Guidelines: 2.1 Components PlacementFigure 1 shows the recommended placement of the SKY74137, SKY77331, T/R switch, and SAW filters. The following general rules should be followed: Traces between the PA (U4) and T/R switch (U3) should be kept as short as possible to redu……