Datasheet > U4240B-A

U4240B-A

更新时间： 2024-02-01 04:32:08

品牌	Logo	应用领域
TEMIC		/
页数	文件大小	规格书
8页	106K
描述
AM - RECEIVER

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技术参数
数据手册

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U4240B-A 技术参数

生命周期：	Obsolete	Reach Compliance Code：	unknown
风险等级：	5.66	Is Samacsys：	N
Base Number Matches：	1

U4240B-A 数据手册

U4240B

TELEFUNKEN Semiconductors

AM-Receiver

Description

The U4240B is a bipolar integrated AM receiver circuit. required of the AM radio receiver. The device is designed

It performs all the active functions and part of the filtering for car radio and home receiver applications.

Features

ESD protected

IF amplifier with gain control

Balanced full-wave detector

Audio preamplifier

IF output for stereo demodulator and

stop signal generation

AF preamplifier with simple filtering

Controlled RF preamplifier

Internal AGC voltage

Amplifier for field-strength indication

Electronic standby ON/ OFF switch

Double balanced mixer

Separate oscillator with amplitude control

Block Diagram

AM-antenna

AM-oscillator

tank

GND

18 (20)

17 (19)

16 (17)

15 (16)

14 (15)

13 (14) 12 (13)

170

11 (12)

10 (11)

150

Controlled

oscillator

Controlled

preamplifier

Internal

supply

voltage

5 k

Indicator

driver

AM-IF

output

Balanced

mixer

Standby

switch

Controlled

IF amplifier

amplifier

Balanced

full-wave

detector

Control

voltage

amplifier

3.5 k

7 k

12 k

7 k

6 (7) 7 (8)

1 (1)

3 (4)

4 (5)

5 (6)

8 (9)

9 (11)

2 (2)

IF BPF

93 7715 e

( ) SSO 20

Figure 1.

Rev. A1: 12.07.1995

1 (8)

12 3 4 5 6 7 8

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