Datasheet > AN611

AN611

更新时间： 2022-11-25 11:11:30

品牌	Logo	应用领域
美信 - MAXIM		手机无线
页数	文件大小	规格书
3页	36K
描述
TD-SCDMA Radio Chipset Block Diagram for Handset Application

阅读下载

获取价格

如果您发现信息不准确，欢迎纠错

AN611 数据手册

WIRELESS, RF, AND CABLE

Jun 01, 2001

TD-SCDMA Radio Chipset Block Diagram for

Handset Application

China option for 3G cellular phone is the TD-SCDMA system. A detailed

handset transceiver diagram is presented showing MAX2361 as the

transmit IC, the MAX2291 as the power amplifier (PA), and the MAX2388

and MAX2309 form the receiver. A VCO buffer amplifier is used to provide

isolation and maintains a clean LO signal.

Overview

TD-SCDMA is the third-generation (3G) cellular phone standard currently under development in

China. In November 1999, the TD-SCDMA standard was adopted by the ITU as one of the

options in the 3GPP mobile communication standard.

TD-SCDMA combines time-division duplex (TDD) and CDMA with up-link (reverse-link)

synchronization, a software radio, and a smart antenna, to increase channel capacity and

improve bandwidth efficiency.

In the radio section of the handset, the TD-SCDMA radio section requires fast switching time,

high dynamic range, and high linearity in both the transmitter and receiver sections. Maxim's

chipset delivers the highest performance, the smallest implementation size, and the least

expensive radio solution available in the TD-SCDMA handset market. The following block

diagram shows a typical application.

Transmitter

The MAX236X is a complete quadrature transmitter, including a quadrature modulator, variable-

gain IF and RF amplifiers, an image-rejecting upconverting mixer, a dual RF and IF synthesizer,

and a dual-band power amplifier (PA) driver amplifier. It is the ideal transmitter for TD-SCDMA

because of these features:

●

Output power of +8dBm with excellent ACPR

A 100dB power-control range

Dual integer-N synthesizers for IF and RF

An image-reject upconverting mixer, which saves one SAW filter

12 3

下载PDF