參數(shù)資料
型號(hào)： VENUS-QP1T
廠商： Mitel Networks Corporation
英文描述： CDMA/AMPS Dual Band RF Receiver
中文描述： 碼分多址/ AMPS二元雙波段射頻接收機(jī)
文件頁(yè)數(shù)： 2/7頁(yè)
文件大?。?/td> 86K
代理商： VENUS-QP1T
2
VENUS-L
Preliminary Information
P
R
Figure1 Pin Connections
QSOP16
CDMA IF
CDMA IFB
VCC
LO 2GHZ
GND
RF 900
GND
CHIP ENABLE
BAND 1900
GND
RF 1900
GND
LO 1GHZ
VCC
AMPS IFB
AMPS IF
9
16
8
1
Circuit Description
The RF section of VENUS-L contains all of the circuitry
necessary to downconvert the RF signal from 900 MHz
or 1900 MHz to an IF of 50-250 MHz, and to correctly
interface with a suitable IF SAW filter. Two RF inputs are
provided, one for the 1900MHz band and one for the 900
MHz band. The required input is activated by means of
the ‘BAND 1900’ pin.
The input is a gm stage which will provide a
characteristic impedance to correctly terminate the RF
image-reject SAW filter.
Two LO ports are provided, one for 1900MHz band and
one for 900 MHz band, both with low noise buffer
amplifiers.
External matching components are required on the RF,
LO and IF ports.
Pin Description
Pin No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Name
CDMA IF
CDMA IFB
VCC
LO 2GHZ
GND
RF 900
GND
CHIP ENABLE
AMPS IF
AMPS IFB
VCC
LO 1GHZ
GND
RF 1900
GND
BAND 1900
Description
CDMA (1900MHz mixer) IF SAW output
CDMA (1900MHz mixer) IF SAW output bar
Positive supply
2 GHz LO input for 1900MHz mixer
Ground
900MHz RF input
Ground
Logic input for chip enable
AMPS (900MHz mixer) IF SAW output
AMPS (900MHz mixer) IF SAW output bar
Positive supply
1GHz LO input for 900MHz mixer
Ground
1900MHz RF input
Ground
Logic input to select 1900MHz or 900MHz signal path operation
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