AN1602 Freescale Semiconductor / Motorola, AN1602 Datasheet

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AN1602

Manufacturer Part Number
AN1602
Description
AN1602 Application Note: Dual-Band PA Application w/DECT Capability Using Std RFICs
Manufacturer
Freescale Semiconductor / Motorola
Datasheet

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SEMICONDUCTOR APPLICATION NOTE
Prepared by: Gilles Montoriol, Christophe Fourtet, Dominique Brunel, Jean Baptiste Verdier and Jacques Trichet
INTRODUCTION
Europe is deployed in both the 900 and 1800 MHz
bandwidths. The regulation is going to allow system
interoperability. Then, an interest is coming in portable
phones which are able to manage both bands.
performances of a dual band power amplifier for GSM at 900
and 1800 MHz. With some modification, this board can also
be used for GSM/DCS1800/DECT applications.
introduced on the market for single band application, which is
a n a d v a n t a g e r e g a r d i n g c y c l e t i m e , c o s t a n d
manufacturability of the PA compared to a specific dual band
PA design.
BOARD FUNCTIONALITIES
MRFIC0917 (GSM IC power amplifier) and the MRFIC1817
(DCS1800 IC power amplifier). Both parts operate at 3.6 V.
REV 1
Motorola, Inc. 2000
Wireless Cellular communications using GSM format in
This application note describes the realization and
This application re–uses standards RFIC’s already
The key parts used in this demonstration board are the
Wireless Subscriber Group, RF Semiconductor Division. Motorola Semiconductor S. A.
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 1. Dual Band Amplifier Block Diagram
Go to: www.freescale.com
and the MRFIC1818 is used for DCS1800. The negative
voltage required by GaAs technology is provided by the
MC33169 (product of On Semiconductor) support IC. In
conjunction with a MMSF4N01HD (product of ON
Semiconductor) N–channel MOSFET, this circuit is able to
control the output power of both power amplifiers. This
control, which is linear, increases performance and stability of
the control loop.
and priority management for IPA drain switching.
generates the ON–state for the selected path and the drive
levels for an optional RF power switch.
solution for a dual band power amplifier function. A block
diagram of the application circuit is shown in Figure 1.
In the 4.8 V application, the MRFIC0913 is used for GSM
The support IC integrates a negative supply, voltage tripler,
Using the selection block, three small signal transistors,
Together, these components form a complete system
Order this document
by AN1602/D

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AN1602 Summary of contents

Page 1

... ON–state for the selected path and the drive levels for an optional RF power switch. Together, these components form a complete system solution for a dual band power amplifier function. A block diagram of the application circuit is shown in Figure 1. Go to: www.freescale.com Order this document by AN1602/D ...

Page 2

Freescale Semiconductor, Inc. MC33169 FUNCTIONALITY The MC33169 integrated circuit provides negative voltage generation and regulation, direct drive of the N–channel drain switch transistor, a complete priority management system, and other possible facilities which are very useful for battery–operated designs ranging ...

Page 3

Freescale Semiconductor, Inc. Figure 3. Component Placement for 3.6 V Application Figure 3a. Application Board for Dual Band PA at 3.6 V using MRFIC0917 and MRFIC1817 MOTOROLA SEMICONDUCTOR APPLICATION INFORMATION For More Information On This Product, Go to: www.freescale.com 3 ...

Page 4

Freescale Semiconductor, Inc. Ó Ó Ó Ó Ó Ó 4 For More Information On This Product, Ó Ó Ó MOTOROLA SEMICONDUCTOR APPLICATION INFORMATION Go to: www.freescale.com Ó Ó ...

Page 5

Freescale Semiconductor, Inc. BOARD DESCRIPTION DC and Control Section The demonstration board layout and component placement for 3.6 V application is shown in Figure 3 and the placement for the 4.8 V board is shown in Figure 17. Input pins ...

Page 6

Freescale Semiconductor, Inc. Figure 5. Gain (1), Isolation (2) and Return Loss for GSM Path at 3.6 V Table 1. Minimum and Typical Performances for GSM Path at 3.6 V ELECTRICAL CHARACTERISTICS ( unless otherwise ...

Page 7

Freescale Semiconductor, Inc. Figure 6. Gain (1), Isolation (2) and Return Loss for DCS1800 Path at 3.6 V Table 2. Minimum and Typical Performances for DCS Path at 3.6 V ELECTRICAL CHARACTERISTICS (V D1 ...

Page 8

Freescale Semiconductor, Inc. Figure 7. Rise Time for GSM Path at 3.6 V within 30 dB Dynamic Range Figure 9. Rise Time for DCS1800 Path at 3.6 V within 30 dB Dynamic Range Figure 11. Spurious Spectrum for GSM Path ...

Page 9

Freescale Semiconductor, Inc. Figure 13. Output RF Voltage Variation with Linear Control Ramp at 3.6 V DECT The DCS path can also be evaluated in the DECT band. In that case the quiescent current of the DCS PA needs to ...

Page 10

Freescale Semiconductor, Inc. Figure 17. Component Placement for 4.8 V Application 10 For More Information On This Product, MOTOROLA SEMICONDUCTOR APPLICATION INFORMATION Go to: www.freescale.com ...

Page 11

Freescale Semiconductor, Inc. Ó Ó Ó MOTOROLA SEMICONDUCTOR APPLICATION INFORMATION For More Information On This Product, Ó Ó Ó Ó Go to: www.freescale.com Ó Ó Ó Ó 11 ...

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Freescale Semiconductor, Inc. Figure 19. Gain and Return Loss for GSM Path at 4.8 V CONCLUSION This demonstration board allows the user to evaluate a GSM/DCS1800 solution for dual band radios or dual band car antenna amplifiers with standard products ...

Page 13

Freescale Semiconductor, Inc. ANNEX Table 3. Minimum and Typical Performances for GSM Path at 4.8 V ELECTRICAL CHARACTERISTICS (V Period unless otherwise noted) A Characteristic Frequency Range Output Power Power Added Efficiency Input VSWR Harmonic Output ...

Page 14

Freescale Semiconductor, Inc. Table 5. Bill of Material for Dual Band Solution at 3.6 V Ref Description C2 Capacitor 0603 C3 Capacitor 0603 C4 Capacitor 0603 C5 Capacitor 0603 C6 Capacitor 0603 AVX C7 Capacitor 0603 AVX C8 Capacitor 0603 ...

Page 15

Freescale Semiconductor, Inc. Table 5. Bill of Material for Dual Band Solution at 3.6 V (continued) Ref Description R11 Resistor 0603 R12 Resistor 0603 R13 Resistor 0603 R14 Resistor 0603 R15 Resistor 0603 R16 Resistor 0603 R17 Resistor 0603 R18 ...

Page 16

Freescale Semiconductor, Inc. Table 6. Bill of Material for Dual Band Solution at 4.8 V (continued) Ref Description C18 Capacitor 0603 C19 Capacitor 0805 C20 Capacitor 0805 C21 Capacitor 0805 C22 Capacitor 0805 C23 Capacitor 0805 C24 Capacitor C25 Capacitor ...

Page 17

Freescale Semiconductor, Inc. Table 6. Bill of Material for Dual Band Solution at 4.8 V (continued) Ref Description CR1 Diode U1 IPA DCS U2 IPA GSM U3 Q1 N–Channel MOSFET Q2 PNP Transistor Q3 PNP Transistor Q4 PNP Transistor MOTOROLA ...

Page 18

Freescale Semiconductor, Inc. 18 For More Information On This Product, NOTES MOTOROLA SEMICONDUCTOR APPLICATION INFORMATION Go to: www.freescale.com ...

Page 19

Freescale Semiconductor, Inc. MOTOROLA SEMICONDUCTOR APPLICATION INFORMATION For More Information On This Product, NOTES Go to: www.freescale.com 19 ...

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... Motorola, Inc. Motorola, Inc Equal JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center, 81–3–3440–3569 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, 2, Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. 852–26668334 MOTOROLA SEMICONDUCTOR APPLICATION INFORMATION Go to: www.freescale.com AN1602/D ...

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