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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)： | 20/27頁 |
| 文件大?。?/td> | 463K |
| 代理商： | LC72134M |
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IF Counter Operation
Applications must first, before starting an IF count operation reset the IF counter by setting CTE in the serial data to 0.
The IF counter operation is started setting CTE in the serial data from 0 to 1. Although the serial data is determined by dropping the CE pin from high to low,
the IF signal input to the IFIN pin must be provided within the wait time from the point CE goes low. Next, the readout of the IF counter after measurement is
complete must be performed while CTE is still 1, since the counter will be reset if CTE is set to 0.
Note: If IF counting is used, applications must determine whether or not the IF IC SD (station detect) signal is present in the microcontroller software, and
perform the IF count only if that signal is asserted. This is because auto-search techniques that only use IF counting are subject to incorrect stopping at
points where there is no station due to IF buffer leakage.
Unlocked State Detection Timing
Unlocked state detection timing
Unlocked state detection is performed during the reference frequency (fref) period (interval). This means that a period
at least as long as the period of the reference frequency is required to recognize the locked/unlocked state. However,
applications must wait at least twice the period of the reference frequency immediately after changing the divisor (N)
(which is applied to the frequency) before checking the locked/unlocked state.
No. 5814-20/27
LC72134M
Figure 1 Unlocked State Detection Timing
For example, if fref is 1 kHz (a period of 1 ms) applications must wait at least 2 ms after the divisor N is changed
before performing a locked/unlocked check.
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 |
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