參數(shù)資料
型號(hào)： TDA6170X
廠商： INFINEON TECHNOLOGIES AG
元件分類(lèi)： 接收器
英文描述： FM, AUDIO DEMODULATOR, PDSO28
封裝： PLASTIC, DSO-28
文件頁(yè)數(shù)： 2/27頁(yè)
文件大?。?/td> 416K
代理商： TDA6170X
Data Sheet
TDA6170X
Semiconductor Group
6
21.7.99
7.3.1
Logic Allocation
7.3.2
IF-Muting
7.4
Converter Mixer
In the converter mixer the sound subcarriers (frequency band approx. 5 to 9.9 MHz) contained in the base-
band of the received composite satellite signal are converted to an output frequency of 10.52 MHz and 10.7
MHz for example. The converter consists of a high-pass input lter followed by a double balanced mixer and a
low impedance output.
The signal of the on chip voltage controlled oscillator (VCO) is applied to the PLL input.
7.5
IF Limiter with Demodulator
The two limiter ampliers are implemented as balanced ve stage, capacitively coupled differential ampliers.
The three inputs are designed as high-pass inputs. The load resistors for the IF lters are connected to
ground.
The output signals of the limiter ampliers are fed directly to the internal PLL FM demodulators.
The demodulated AF signals are fed to the input of a pre volume control part in front of the expander the de-
emphasis networks and audio switches.
Byte
Data
Remarks
Address Byte
0
1
0
MA
R/W
A
Progr. Divider Byte 1
0
N11
N10
N9
N8
N7
N6
A
Progr. Divider Byte 2
0
N5
N4
N3
N2
N1
N0
A
Control Byte 1
1
5I
Z2
Z1
Z0
X
A
Control Byte 2
1
VL2
VL1
VL0
VR2
VR1
VR0
X
A
Control Byte 3
1
PVL2
PVL1
PVL0 PVR2 PVR1 PVR0
X
A
Address Byte 11
1. Chip address (CAS) Pin 5 grounded
0
1
0
1
0
A
=H44
Address Byte 22
2. Chip address (CAS) Pin 5 open
0
1
0
1
0
A
=H46
Control Bits
IF-Source
Function
Z2
Z1
Z0
IF1
IF2
IF3
0
on
off
expanders are working, audio = stereo
0
1
off
on
off
expanders are working, audio = mono
0
1
0
on
off
expanders are working, audio = mono
0
1
off
on
de-emphasis = 50
; audio = mono
1
0
off
on
de-emphasis = 75
; audio = mono
1
0
1
off
on
de-emphasis = J17; audio = mono
1
0
off
External audio
1
off
Mute
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