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參數資料
| 型號： | LA1776M |
| 元件分類： | 調諧器 |
| 英文描述： | 2-BAND, AUDIO TUNER, PQFP64 |
| 封裝： | 14 X 14 MM, QFP-64 |
| 文件頁數： | 25/41頁 |
| 文件大小： | 547K |
| 代理商： | LA1776M |
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No.8085-31/41
LA1776M
7. Multiplex Block
7-1. Pilot Canceller
The pin 18 pilot canceller signal waveform is a 19 kHz signal in which the third harmonic is not present. Since
this signal has the same phase as the pilot signal, no capacitor is required between pin 18 and ground. Since the
third harmonic is not present, excellent pilot cancellation in both the left and right channels can be acquired by
adjusting the circuit with a variable resistor.
7-2. Separation Adjustment (pin 19)
The separation is adjusted by adjusting the sub-decoder input level with the pin 19 variable resistor VR.
Adjusting VR only changes the sub-channel modulation. It does not change the monaural (main) output level.
Degradation of high band separation in the decoder can be avoided if the impedance of the external capacitor
value (C) is made enough smaller than the impedance of VR in the sub-channel signal frequency band (23 to 53
kHz).
8. MRC Block
17
30
11
10
6800 pF
18
0.01
F 50 k
PILOT
CANCEL
GATE
Noise canceller
input
To the
multiplexer
–
19
5 k
0.047
F
C
To the
subdecoder
20 k
Larger
24
32
27
MRC
5.5 k
30 k
5.5 k
1 k
DC BUFFER
FM Vsm
FM/AM Vsm
HPF: C26, 30K
LPF: C32
Gain: R26
7
A
0.22
F
C26
3.3
F
100
10 k
100 k
1000 pF
R26
51 k
C27
C24
C32
26
+
*: When the AC component is removed with C24.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LA1776M_09 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Single-Chip Tuner IC for Car Radios |
| LA1776M-MPB-E | 功能描述:調諧器 RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數: 工作電源電壓: 最小工作溫度: 最大工作溫度: |
| LA177B/HG-2 | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
| LA177B-1-SRG | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
| LA177B-HG-2 | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
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