HD155121F

更新时间： 2024-09-18 23:14:59

品牌	Logo	应用领域
日立 - HITACHI		电信集成电路蜂窝电话电路电信电路个人通信信息通信管理 GSM PC PCN
页数	文件大小	规格书
57页	428K
描述
RF Transceiver IC for GSM and PCN Dual band cellular systems

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HD155121F 数据手册

HD155121F

RF Transceiver IC for GSM and PCN Dual band cellular systems

ADE-207-265A (Z)

2nd Edition

May 1999

Description

The HD155121F is a RF transceiver IC for GSM and PCN dual band cellular systems, and integrates most

of the low power silicon functions of a transceiver. The HD155121F incorporates two bias circuits for RF

LNAs, two first mixers, a second mixer, a programmable gain amplifier, and an IQ demodulator for the

receiver, and an IQ modulator and offset PLL for the transmitter. Also, on chip are dividers for the phase

splitter. Moreover the HD155121F includes control circuits to implement power saving modes. These

functions can operate down to 2.7 V and are housed in a 48-pin LQFP SMD package.

Hence the HD155121F can form a small size transceiver handset for dual band by adding a dual PLL

frequency synthesizer IC, power amplifiers and some external components.

The HD155121F is fabricated using a 0.6 µm double-polysilicon Bi-CMOS process.

Functions

Receiver(Rx)

•

Low Noise Amplifier (LNA) bias circuit

First mixer

IF amplifier and second mixer

Programmable Gain Amplifier (PGA)

IQ demodulator with 90 degree phase splitter

Transmitter(Tx)

•

IQ modulator with 90 degree phase splitter

Offset PLL

Down converter

Phase comparator

TXVCO driver

Others

•

IF dividers

Power saving control circuit

IFVCO

12 3 4 5 6 7...57

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