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參數(shù)資料
| 型號： | MC13142D |
| 廠商： | MOTOROLA INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Fan cover for JPS250 12, 15, 48V, PQ41, PQ46, PQ47 models RoHS Compliant: Yes |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PDSO16 |
| 封裝： | PLASTIC, SO-16 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 266K |
| 代理商： | MC13142D |
MC13142
7
MOTOROLA RF/IF DEVICE DATA
Figure 2. 900 MHz Circuit Side Component Placement View
NOTES:
The PCB is laidout for the 4DFA (2 pole SMD type) and 4DFB (3 pole SMD type) filters which are available for applications in
cellular and GSM,GPS (1.2–1.5 GHz), DECT, PHS and PCS (1.8–2.0 GHz) and ISM Bands (902–928 MHz and 2.4–2.5 GHz).
In the component placement shown above, the 926.5 MHz dielectric type image filter is used (Toko Part # 4DFA–926A10).
The PCB also accommodates a surface mount SAW filter in an eight or six pin ceramic package for the cellular base and
handset frequencies. Recommended manufacturers are Siemens and Murata.
Traces are provided on the PCB to evaluate the LNA and mixer separately. The component placement view shows external
circuit components used for the 926.5 MHz application circuit. Note: some traces must be cut to accommodate placement of
components; likewise some traces must be shorted. The voltage controlled oscillator is shown with the varactor referenced to
VEE ground. The PCB is modified as shown to do this.
16:1 broadband impedance transformer is mini circuits part #TX16–R3T; it is in the leadless surface mount “TX” package.
Components L and C comprise a low pass filter used to provide narrowband matching at a given IF frequency. For example at
49 MHz C = 36 p and L = 330 nH.
The microstrip trace on the ground side of the PCB is intended for a microstrip resonator; it is cut free when using a lump
inductor as done above.
Mix Lin Cont
Mix In
LNA
Input
Toko
926A10
Dielectric
Filter
16:1
Impedance
Transformer
IF
Out
1
MC13142D
Rev A
LNA
Output
VCC
V–Cont
3
3
3
3
100 p
18 nH
51
PC
Rotary
Switch
L
2.4 p
2.4 p
47 p
390 nH
5.6 p
100 p
33 k
120 k
1
9
2
1
1
MC13142D
LO
Buf
Out
C
ééé
ééé
éé
5
MMBV809
6.8 nH
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