Datasheet > LM1863

LM1863

更新时间： 2024-09-13 22:51:55

品牌	Logo	应用领域
美国国家半导体 - NSC		电子
页数	文件大小	规格书
14页	270K
描述
AM Radio System for Electronically Tuned Radios

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LM1863 数据手册

May 1989

LM1863 AM Radio System for

Electronically Tuned Radios

General Description

The LM1863 is a high performance AM radio system intend-

ed primarily for electronically tuned radios. Important to this

application is an on-chip stop detector circuit which allows

for a user adjustable signal level threshold and center fre-

quency stop window. The IC uses a low phase noise, level-

controlled local oscillator.

and sufficient gain are provided to allow the IC to also be

used in conjunction with a loopstick antenna.

Features

Low supply current

Level-controlled, low phase noise local oscillator

Low phase noise is important for AM stereo which detects

phase noise as noise in the L-R channel. A buffered output

for the local oscillator allows the IC to directly drive a phase

locked loop synthesizer. The IC uses a RF AGC detector to

gain reduce an external RF stage thereby preventing over-

load by strong signals. An improved noise floor and lower

THD are achieved through gain reduction of the IF stage.

Fast AGC settling time, which is important for accurate stop

detection, and excellent THD performance are achieved

with the use of a two pole AGC system. Low tweet radiation

Buffered local oscillator output

Stop circuitry with adjustable stop threshold and adjust-

able stop window

Open collector stop output

Excellent THD and stop time performance

Large amount of recovered audio

RF AGC with open collector output

Meter output

Compatible with AM stereo

Block Diagram

TL/H/5185–1

Order Number LM1863M

See NS Package Number M20B

1995 National Semiconductor Corporation

TL/H/5185

RRD-B30M115/Printed in U. S. A.

12 3 4 5 6 7...14

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与LM1863相关器件

型号	品牌	获取价格	描述	数据表
LM1863M	NSC	获取价格	AM Radio System for Electronically Tuned Radios
LM1863N/A+	ETC	获取价格	AM Receiver Circuit
LM1863N/B+	ETC	获取价格	AM Receiver Circuit
LM1865	NSC	获取价格	Advanced FM IF System
LM1865M	NSC	获取价格	Advanced FM IF System
LM1865MX	TI	获取价格	FM, AUDIO DEMODULATOR, PDSO20, 0.300 INCH, PLASTIC, SOP-20
LM1865N	NSC	获取价格	Advanced FM IF System
LM1865N/A+	ETC	获取价格	FM Receiver Circuit
LM1865N/B+	ETC	获取价格	FM Receiver Circuit
LM1866	NSC	获取价格	LOW VOLTAGE AM/FM RECEIVER