Datasheet > SA1021

SA1021

更新时间： 2024-10-05 06:09:59

品牌	Logo	应用领域
士兰微 - SILAN		便携式无线
页数	文件大小	规格书
6页	174K
描述
FM RADIO RECEIVER FOR PORTABLE SYSTEM

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SA1021 数据手册

SA1021

FM RADIO RECEIVER FOR PORTABLE SYSTEM

DESCRIPTION

The SA1021 integrated radio receiver circuit is for portable radio

stereo as well as mono, where a minimum of periphery is important in

terms of small dimensions and low cost. It is fully compatib

applications using the low•voltage micro tuning system (MTS). The IC

has

a frequency locked loop (FLL) system with an interm

frequency of 76kHz. The selectivity is obtained by active RC filte

The only function to be tuned is the resonant frequency

oscillator.Interstation noise as well as noise from receiving

signals is reduced by a correlation mute system.

SOP•16•225•1.27

Special precautions have been taken to meet local os

radiation requirements. Because of the low intermediate frequenc

low pass filtering of the MUX signal is required to avoid noise wh

receiving stereo. 50kHz roll•off compensation, needed because of the

low pass characteristic of the FLL, is performed by the integrated LF

amplifier. For mono application this amplifier can be used to edcirtly

drive an earphone. The field•strength detector enables fields•trength

dependent channel separation control.

ORDERING INFORMATION

Part No.

Package

SOP•16•225•1.27

SA1021

* Mixer

* IF amplifier/limiter

* Mute circuit

FEATURES

* RF input stage

* Loop amplifier

* Local oscillator

* LF amplifier for mono earphone

amplifier or MUX filter

* Frequency detector

* MTS compatible

* Internal reference circuit

* Field•strength dependent channel separation control facility.

BLOCK DIAGRAM

MIX

AMP

Buffer

IF Filter

OSC

CLIM

VCO

MUTE

Demodulation

IF limiter

AMP

STAB

Fig.1 Block diagram

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

Http: www.silan.com.cn

REV:2.0

2004.07.31

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