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參數(shù)資料
| 型號： | MGCT04LH1T |
| 廠商： | Zarlink Semiconductor Inc. |
| 英文描述： | Transmit Circuit for TDMA/AMPS and CDMA/AMPS |
| 中文描述： | 發(fā)送電路的TDMA / AMPS二元和CDMA / AMPS二元 |
| 文件頁數(shù)： | 2/12頁 |
| 文件大?。?/td> | 343K |
| 代理商： | MGCT04LH1T |
1
MGCT04
Transmit Circuit for TDMA/AMPS and CDMA/AMPS
Preliminary Information
DS5424
ISSUE 1.1
March 2001
Ordering Information
MGCT04/KG/LH1S
MGCT04/KG/LH1T
mobile phones. It can be used for both TDMA/AMPS
or
CDMA/AMPS
systems.
compatible with baseband and mixed signal interface
circuits from Zarlink Semiconductor and other
manufacturers.
The
MGCT04
is
System costs have been kept to a minimum by
removing the requirement for an additional SAW filter
in the transmit IF path. The AGC has been split
between RF and IF sections to reduce noise and a
low pass filter has been included before the IF
variable gain amplifier to remove spurious products
produced in the modulator.
Figure 1 - MGCT04 Block Diagram
Features
Dual RF Ports for 900MHz and 1900MHz
AGC Amplifier with 90dB of Variable Gain, Fully
Compensated for Temperature
On-chip Active Filter. Removes the
Requirement for External IF SAW Filter
High Power 900MHz and 1900MHz Output
Stages
Quadrature Modulator
Small Scale MLF Package
Applications
Transmit Modulator and Up-converter in TDMA/
AMPS Mobile Phones
Transmit Up-converter in CDMA/AMPS Mobile
Phones
The MGCT04 circuit is designed for use in dual
band, dual mode cellular 900MHz/PCS1900MHz
RF900
÷
2/4 AND
PHASE
SHIFT
IF VGA
ALL PASS
PHASE
SHIFT
NETWORK
RF VGA
RF190
RF900
RFDEG1
VCO
BUFFER
OSC
BUFFER
÷
8
VGA CONTROL
VHF OSC IN
Q IN
Q IN
I IN
I IN
13
14
15
16
7
10
9
22
AGC
UHF
OSCILLATOR
INPUT SELECT
CONTROL LOGIC
POWER CONTROL
8
CP2
CP1
CP0
23
5
19
21
LO 2GHz
LO 1GHz
1900 MHz
OUTPUT DRIVER
900 MHz
OUTPUT DRIVER
27
26
28
1
3
2
V
REF
BIAS
BUFFER
VHF OSC BIAS
SSB MIXER
DIV
OUT
RF190
RFDEG2
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