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參數(shù)資料
| 型號： | PMB2208 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | Mixer and IF Vector Modulator |
| 中文描述： | 混頻器和中頻矢量調(diào)制器 |
| 文件頁數(shù)： | 6/27頁 |
| 文件大?。?/td> | 766K |
| 代理商： | PMB2208 |
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Product Description
2 - 2
PMB 2208
preliminary
Wireless Components
Confidential
Specification, August 1999
2.1
Overview
The PMB 2208 contains a direct quadrature modulator and an up/down-conver-
sion mixer with corresponding bias circuitry.
The modulator splits the signal at the LO/LOX input into two orthogonal carri-
ers. The frequency of these carriers is half of the LO/LOX input frequency. The
carriers are multiplied with the baseband modulation signals at the A/AX and
B/BX inputs. The outputs of the multipliers are added and amplified by a linear
output stage. The modulated signal is available at the E/EX output. A reference
voltage is available at the TREF output, which can be used to bias the base-
band inputs.
The mixer combines the signals at the RF/RFX and IF/IFX inputs; the resulting
signal is available at the MO/MOX output. The IF/IFX input is suitable for the
lower-frequency signal because of its linear transfer function to the output. The
higher-frequency signal is applied to the RF/RFX input, which operates in
switched mode. In a typical application, the output signal of the modulator is
band-pass filtered and then fed to the IF/IFX input of the mixer.
The modulator and mixer have separate power supplies, and can be powered
down independently. The power-down concept enables the modulator to be
used with or without the mixer.
2.2
Features
I
Direct quadrature modulator and up/down-conversion mixer on one chip
I
Modulator:
-
LO input frequency range from 200MHz to 550MHz corresponds to an out-
put frequency range from 100MHz to 275MHz
-
Generation of orthogonal carriers without external elements and without
trimming
-
typ. 48dB carrier suppression with 1V
pp
baseband level
typ. 49dB SSB suppression with 1V
pp
baseband level
typ. 51dB rejection of third-order intermodulation products with 1V
pp
base-
band level
-
-
-
Low output noise floor
I
Mixer:
-
Double-balanced Gilbert cell
-
RF and IF frequency range from DC to 2.5GHz
-
typ 39dB carrier suppression
-
Low noise
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