參數(shù)資料
型號(hào)： LC72121M
廠商： Sanyo Electric Co.,Ltd.
英文描述： PLL Frequency Synthesizers for Electronic Tuning
中文描述： 鎖相環(huán)頻率合成器電子調(diào)諧
文件頁(yè)數(shù)： 15/22頁(yè)
文件大?。?/td> 379K
代理商： LC72121M
Structure of the IF Counter
The LC72121 IF counter is a 20-bit binary counter, and takes the IF signal from the IFIN pin as its input. The result of
the count can be read out serially, MSB first, from the DO pin.
The IF frequency (Fc) is measured by determining how many pulses were input to the IF counter in the stipulated
measurement time, GT.
GT
Fc =C
x
GT)
C: Counted value (the number of pulses)
No. 5815-15/22
LC72121, 72121M, 72121V
GT1
GT0
Measurement time
Measurement time (GT)
Wait time (t
WU
)
3 to 4 ms
0
0
4 ms
0
1
8
3 to 4 ms
1
0
32
7 to 8 ms
1
1
64
7 to 8 ms
IF Counter Frequency Measurement Examples
When the measurement time (GT) is 32 ms and the counted value (C) is 53980 (hexadecimal) or 342,400 decimal.
IF frequency (F
C
) = 342400
÷
32 ms = 10.7 MHz
When the measurement time (GT) is 8 ms and the counted value (C) is E10 (hexadecimal) or 3600 decimal.
IF frequency (F
C
) = 3600
÷
8 ms = 450 kHz
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LC72121MA 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:CMOS IC PLL Frequency Synthesizers for Electronic Tuning
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LC72121MV 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:
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