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AN3394 Datasheet(PDF) 27 Page - STMicroelectronics

Part # AN3394
Description  Antenna design and impedance matching guidelines for CR95HF multiprotocol contactless transceiver IC
PDF  29 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3394 Datasheet(HTML) 27 Page - STMicroelectronics

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AN3394
Demonstration of C11 and C22 calculation
Doc ID 018754 Rev 5
27/29
Equation (A.III.3)
Equation (A.III.4)
By equation (A.III.3):
Equation (A.III.5)
By equation (A.III.4):
Equation (A.III.6)
Where
QRX = quality coefficient.
2R
RX
×
R
RXP
1Q
RX
2
+
------------------------
=
1
ω C
input
×
--------------------------
Q
RX
2
1Q
RX
2
+
------------------------
1
C
input
p
–
ω
×
---------------------------------
×
=
R
RXP
2R
RX
×
1Q
RX
2
+
()
×
=
C
input
p
–
C
input
Q
RX
2
1Q
RX
2
+
------------------------
×
=



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