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參數(shù)資料
| 型號： | LMX2322 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | PLLatinumTM 2.0 GHz Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLLatinumTM 2.0千兆赫頻率合成射頻個人通信 |
| 文件頁數(shù)： | 10/14頁 |
| 文件大小： | 227K |
| 代理商： | LMX2322 |
LMX2322
2.3.1 5-BIT SWALLOW COUNTER DIVIDE RATIO (A COUNTER)
Swallow
Count
(A)
4
3
2
0
0
0
0
1
0
0
0
31
1
1
1
Notes:
Swallow Counter Value: 0 to 31
Advance Information
Rev 1.6
9/24/1998
10
NA_CNTR
1
0
0
1
0
0
1
1
2.3.2 10-BIT PROGRAMMABLE COUNTER DIVIDE RATIO (B COUNTER)
NB_CNTR
Divide
Ratio
9
8
7
6
3
0
0
0
0
4
0
0
0
0
1023
1
1
1
1
NB_CNTR > NA_CNTR
5
0
0
1
4
0
0
1
3
0
0
1
2
0
1
1
1
1
0
1
0
1
0
1
NOTES:
Divide ratio: 3 to 1,023(Divide ratios less than 3 are prohibited)
2.3.3 PULSE SWALLOW FUNCTION
NB_CNTR
>
NA_CNTR
The N divider counts such that it divides the VCO RF frequency by (P+1) A times, and then divides by P(B
-
A)
times. The B value (NB_CNTR) must be > 3. The continuous divider ratio is from 992 to 32,767. Divider ratios
less than 992 are achievable as long as the binary counter value is greater than the swallow counter value
(NB_CNTR > NA_CNTR).
fvco = N x ( fosc / R )
N = (P x B) + A
fvco: Output frequency of external voltage controlled oscillator (VCO)
fosc:
Output frequency of the external reference frequency oscillator
R:
Preset divide ratio of binary 10-bit programmable reference counter (3 to 1023)
N:
Preset divide ratio of main 15-bit programmable integer N counter (992 to 32,767)
B:
Preset divide ratio of binary 10-bit programmable B counter (3 to 1023)
A:
Preset value of binary 5-bit swallow A counter (0 < A < 31, A < B)
P:
Preset modulus of dual modulus prescaler (P=32)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2322 WAF | 制造商:Texas Instruments 功能描述: |
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| LMX2323 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum? 2.0 GHz Frequency Synthesizer for RF Personal Communications |
| LMX2323 WAF | 制造商:Texas Instruments 功能描述: |
| LMX2323TMX | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
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