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STW81102AT 数据表(PDF) 37 Page - STMicroelectronics

部件名 STW81102AT
功能描述  Multi-band RF frequency synthesizer with integrated VCOs
PDF  43 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STW81102AT 数据表(HTML) 37 Page - STMicroelectronics

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STW81102
Application information
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7.2
Divided by 2 Output
If the user's application does not require a balanced to unbalanced conversion, the output
matching reduces to the simple circuit shown below (Figure 31).
This solution can be easily used to provide one single ended output just terminating the
other output at 50
Ω with a 3dB power loss.
Figure 31.
Differential/single ended output network in the 1.5 - 2.325GHz range
(MATCH_LC_LUMP_2G_DIFF.dsn)
A first solution to combine the differential outputs is the lumped LC type balun tuned in the
2GHz band (Figure 32).
Figure 32.
LC lumped balun for divided by 2 output (MATCH_LC_LUMP_2G.dsn)
The same recommendation for the SMD components applies also for the divided by 2
output.
Another topology suitable to combine the two outputs for the divided by 2 frequencies is
represented in Figure 33.
RFOUTP
RFOUTN
VCC
22nH
50 Ohm
10pF
22nH
10pF
VCC
50 Ohm
50 Ohm
50 Ohm
RFOUTP
RFOUTN
VCC
2.7nH
2.7nH
2pF
2pF
3pF
50 Ohm
3nH
VCC
2.7nH
2.7nH
2pF
2pF
50 Ohm
50 Ohm
RFOUTP
RFOUTN
VCC
2.7nH
2.7nH
2pF
2pF
3pF
50 Ohm
3nH
VCC
2.7nH
2.7nH
2pF
2pF
50 Ohm
50 Ohm



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