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參數(shù)資料
| 型號(hào)： | LC72131M |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO20 |
| 封裝： | MFP20 |
| 文件頁(yè)數(shù)： | 8/23頁(yè) |
| 文件大?。?/td> | 405K |
| 代理商： | LC72131M |
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IF Counter Structure
The LC72131 IF counter is a 20-bit binary counter. The result, i.e., the counter’s msb, can be read serially from the DO pin.
The IF frequency (Fc) is measured by determining how many pulses were input to an IF counter in a specified
measurement period, GT.
Fc =
(C = Fc
× GT)
C: Count value (number of pulses)
1. IF Counter Frequency Calculation Examples
When the measurement period (GT) is 32 ms, the count (C) is 53980 hexadecimal (342400 decimal):
IF frequency (Fc) = 342400
÷ 32 ms = 10.7 MHz
When the measurement period (GT) is 8 ms, the count (C) is E10 hexadecimal (3600 decimal):
IF frequency (Fc) = 3600
÷ 8 ms = 450 kHz
C
GT
No. 4921-16/23
LC72131, 72131M
GT1
GT0
Measurement time
Measurement period (GT) (ms)
Wait time (twu) (ms)
0
4
3 to 4
0
1
8
3 to 4
1
0
32
7 to 8
1
64
7 to 8
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC72131MDTRM | 制造商:Panasonic Industrial Company 功能描述:IC |
| LC72132 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:AM/FM PLL Frequency Synthesizer |
| LC72132M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:AM/FM PLL Frequency Synthesizer |
| LC72133M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning |
| LC72133M_11 | 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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