參數(shù)資料
型號: U2861B-M
英文描述: Mono FM Sound Demodulator for TV Systems
中文描述: 單聲調頻解調器電視系統(tǒng)
文件頁數(shù): 1/11頁
文件大?。?/td> 263K
代理商: U2861B-M
U2861B
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A1, 20-May-97
1 (11)
Mono FM Sound Demodulator for TV Systems
Description
The U2861B is an alignment-free FM sound IF demo-
dulator for all TV standards from 4.5 MHz up to 6.5 MHz
(standard M, N, B/G, I, D/K). The circuit includes two
switchable audio inputs and volume control. With a
supply voltage of 5 V, the U2861B is suitable for TV,
VCR and Multimedia applications.
Features
D Completely alignment-free
D PLL demodulator for FM intercarrier sound IF signals
(mono)
D Two audio switches
D Very few external components
D Volume control by DC voltage
D Supply voltage: 5 V; low power consumption
5 k
W
VCO
3
Bandgap
reference
67
10
12
1
AF1in
V
S
8
AF2out
14
13
2
4
Decoupling
De-
emphasis
9
11
Volume
control
Sound IF
input
96 11832
5
FM
mute
Audio
switch1
Audio
switch2
AF1out
AF2in
Switch2
Switch1
vi,AF1
Cdec
vi,SIF
GND
Cref
VS
Cdem
VSW1
vo,AF1
VSW2
vi,AF2
Vvol
vo,AF2
Vmute
Figure 1. Block diagram
Ordering Information
Extended Type Number
Package
Remarks
U2861B – M
DIP14
U2861B – MFPG3
SO14
taped on reel
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