- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358759 > LC72134M (Sanyo Electric Co.,Ltd.) Dual PLL Frequency Synthesizer for FM Tuner Systems(用于FM調(diào)諧器的雙鎖相環(huán)頻率合成器) PDF資料下載
參數(shù)資料
| 型號： | LC72134M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Dual PLL Frequency Synthesizer for FM Tuner Systems(用于FM調(diào)諧器的雙鎖相環(huán)頻率合成器) |
| 中文描述： | 雙鎖相環(huán)頻率合成調(diào)頻調(diào)諧器系統(tǒng)（用于調(diào)頻調(diào)諧器的雙鎖相環(huán)頻率合成器） |
| 文件頁數(shù)： | 23/27頁 |
| 文件大?。?/td> | 463K |
| 代理商： | LC72134M |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁當(dāng)前第23頁第24頁第25頁第26頁第27頁
No. 5814-23/27
LC72134M
Other Items
Notes on the phase comparator dead zone
When the charge pump is used with one of the ON/ON modes, correction pulses are generated from the charge pump
even if the PLL is locked. As a result, it is easy for the loop to become unstable, and special care is required in
application design. The following problems can occur if an ON/ON mode is used.
— Sidebands may be created by reference frequency leakage.
— Sidebands may be created by low-frequency leakage due to the correction pulse envelope.
Although the loop is more stable when a dead zone is present (i.e. when an OFF/OFF mode is used), a dead band
makes it more difficult to achieve excellent C/N characteristics. On the other hand, while it is easy to achieve good C/N
characteristics when there is no dead zone, achieving good loop stability is difficult. Accordingly, the DZA and DZB
settings, in which there is no dead zone, can be effective in situations where a signal-to-noise ratio of 90 to 100 dB or
higher is required in FM reception, or where it is desirable to increase the pilot margin in AM stereo reception.
However, if such a high signal-to-noise ratio is not required for FM reception, if an adequate pilot margin can be
acquired in AM stereo reception, or if AM stereo is not required, then either DZC or DZD, in which there is a dead
band, should be chosen.
DZ1
DZ0
Dead band mode
Charge pump
Dead band
0
0
DZA
ON/ON
– –0s
0
1
DZB
ON/ON
–0s
1
0
DZC
OFF/OFF
+0s
1
1
DZD
OFF/OFF
+ +0s
≥
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LC72135M | PLL Frequency Synthesizer for Electronic Tuning(用于電子調(diào)諧的鎖相環(huán)頻率合成器) |
| LC72136N | PLL Frequency Synthesizer for Electronic Tuning(用于電子調(diào)諧的鎖相環(huán)頻率合成器) |
| LC72136 | PLL Frequency Synthesizer for Electronic Tuning(用于電子調(diào)諧的鎖相環(huán)頻率合成器) |
| LC72137 | PLL Frequency Synthesizer for Electronic Tuning(用于電子調(diào)諧的鎖相環(huán)頻率合成器) |
| LC72140 | PLL Frequency Synthesizer(鎖相環(huán)頻率合成器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC72135M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning |
| LC72135MA-AE | 功能描述:時鐘合成器/抖動清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| LC72135MA-Q-AE | 制造商:ON Semiconductor 功能描述:PLL FREQUENCY SYNTHESIZER - Tape and Reel 制造商:ON Semiconductor 功能描述:REEL / PLL FREQUENCY SYNTHESIZER |
| LC72135M-Q-TLM-E | 制造商:SANYO Semiconductor Co Ltd 功能描述: |
| LC72136 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。