TDA1574 데이터 시트보기 (PDF) - Gunter Seniconductor GmbH.
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TDA1574 Datasheet PDF : 12 Pages
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Block Diagram
10
+V
CC
OUTPUT
AGC
100
22 n
MIXER OUTPUT
10 n
n1
5.5
68
VOLTAGE
300 VaM
AGC
NARROW BAND
IF INPUT
TUNER
V
iIF
82 p 5.5
RML
INFORMATION
n2
ON OFF
22 n
22 n
17 IF OUTPUT 16
15
V
p
12
11
14
13
300
IF AMPLIFIER
-
300 10
+
+
50µA
18
+
-
0.5 V
+
-
STAND BY
SWITCH
+
VOLTAGE
V
STABILIZER
p
Vref
5
4.1 V
+
200
AGC-VOLTAGE
GENERATION
10 k
+
=
1.7V
-
950
9
+
OSCILLATOR
OUTPUT BUFFERS
+
DOUBLE BALANCED
MIXER
-
14
14
IF OUTPUT
VOLTAGE
22 n
VaIF
300
10 n
BUFFERED
OSCILLATOR
OUTPUT
1n
75
TDA 1574
HF INPUT
1
2
3
4
50
V
e1HF ~~
R
g1
(98 MHz)
1
4
n1 n2
6.8 p
56 p
56 p
1n
6.8 p
Rg2 50
~~ Ve2HF
(98 MHz) for AGC
OSCILLATOR
6
3.9 p
+
-
7
8
30 p
3 1/4
1 1/4
n1 n2
Functional Description
The TDA1574 is an integrated monolithic FM tuner for use in the RF / IF part of car radios and home receivers. lt
contains all function units for a complete VHF tuner with exception of a RF stage.
The following sections are integrated:
• mixer
• oscillator inclusive buffer stages and a measuring output
• linear IF amplifier
• standby switch
• reference voltage source
• control voltage generation
2
09/00
TDA1574
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