參數(shù)資料
型號： PMB2341
廠商： INFINEON TECHNOLOGIES AG
英文描述： 10-pin Single PLL
中文描述： 10針單鎖相環(huán)
文件頁數(shù)： 11/26頁
文件大?。?/td> 410K
代理商： PMB2341
Functional Description
3 - 5
PMB 2341
preliminary
Wireless Components
Confidential
Specification, February 2000
Figure 3-3
Frequency detector output waveforms
Frequency setting / divider ratio calculation:
The frequency of an external VCO controlled by the PMB 2341 is given below:
with .
f
VCO
:
f
RI
:
N:
A:
P:
R:
M=P*N+A:
frequency of the external VCO
reference frequency
divide ratio of the N-counter
divide ratio of the A-swallow counter
divide ratio of the prescaler (33 in case of 32/33 prescaler selected)
divide ratio of the R-counter
total divide ratio
Note:
for continuous frequency steps following condition is necessary
P N
A
+
[
]
P
P
1
–
(
)
≥
Further restrictions have to be fullfilled:
P-Channel
Tri-State.
N-Channel
P-Channel
Tri-State.
N-Channel
RI
CP
CP
(RI:R)
(LO:M)
positive Polarity
Frequency
f
V
>
f
R
f
V
leading
Frequency
f
V
=
f
R
lock state
Frequency
f
V
<
f
R
f
V
lagging
f
R
f
V
LO
negative Polarity
f
VCO
P N
(
)
A
+
[
]
f
R
------
R
M
RI
=
=
A
A
P
N
<
≤
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