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PDF PMB2341 Data sheet ( Hoja de datos )
| Número de pieza | PMB2341 | |
| Descripción | 10-pin Single PLL | |
| Fabricantes | Infineon Technologies AG | |
| Logotipo |  |
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Wireless Components
10-pin Single PLL
PMB 2341 Version 1.0
Specification February 2000
DS 1
1 page  
2 Product Description
Contents of this Chapter
2.1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.3 Package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
5 Page 
Confidential
PMB 2341
preliminary
Functional Description
RI
fR (RI:R)
LO
fV (LO:M)
P-Channel
CP Tri-State.
N-Channel
positive Polarity
CP P-Channel
Tri-State.
N-Channel
negative Polarity
Frequency fV < fR
fV lagging
Frequency fV > fR
fV leading
Frequency fV = fR
lock state
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 .
fVCO:
fRI:
N:
A:
P:
R:
M=P*N+A:
fVCO
=
[
(
P
⋅
N
)
+
A
]
⋅
-f--R---I
R
=
M----
R
⋅
fRI
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:
A<P
A≤N
Wireless Components
3-5
Specification, February 2000
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet PMB2341.PDF ] | |
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