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U2510B

All-Band AM/FM Receiver and Audio Amplifier

Description

The U2510B is an integrated bipolar one-chip AM/FM

radio circuit. It contains an FM front end with

preamplifier, FM IF and demodulator, a complete AM

receiver, an AF amplifier and a mode switch for AM, FM

and tape. This circuit is designed for clock radios and

portable radio-cassette recorders.

Features

D

Superior FM strong signal behavior by using RF AGC

D

Soft mute and HCC for decreasing interstation noise

in FM mode

D

Excellent AFC performance (level controlled, both

polarities available)

D

Level indicator (LED drive) for AM and FM

D

DC mode control: AM, FM and tape

D

Wide supply-voltage range and low quiescent current

D

High AF output power: 1 W

D

Electronic volume control

D

Electronic AF bandwidth control (treble and high cut)

D

Output stage for headphone and speaker drive

Block Diagram

FM RF

tank

FM ant.

V

S

9

8

7

AFC

FM RF

BPE

AGC

12

FM

front end

FM

AGC

AM

front end

RF AGC

Voltage stab.

and

mode control

15

AM/FM

IF

AGC

AM

AGC

AFC

control

AM IF

amp. and

detect.

IF

Level

indic.

AF preamp.

Volume

Mute

HCC

21

13

20

19

1 22

18

FM IF

amp.

FM

discr.

Power

amp.

25

23

24

4

6

14

16

2

26

28

27

3

FM osc.

tank

IF BPE

(Replaceable)

11

AM

ant.

AM osc.

tank

10

5

V

Ref

AM

S

2

V

S

AFC mode

LED

V

S

Treble

Vol

13912

FM Tape

Figure 1. Block diagram

Rev. A3, 23-Feb-01

1 (15)

next

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  英文版
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• U2510B
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• U2510B-MT
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