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PDF UAA2077BM Data sheet ( Hoja de datos )
| Número de pieza | UAA2077BM | |
| Descripción | 2 GHz image rejecting front-end | |
| Fabricantes | NXP Semiconductors | |
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INTEGRATED CIRCUITS
DATA SHEET
UAA2077BM
2 GHz image rejecting front-end
Product specification
Supersedes data of July 1995
File under Integrated Circuits, IC03
1995 Dec 13
1 page  
Philips Semiconductors
2 GHz image rejecting front-end
Product specification
UAA2077BM
FUNCTIONAL DESCRIPTION
Receive section
The circuit contains a low-noise amplifier followed by two
high dynamic range mixers. These mixers are of the
Gilbert-cell type, the whole internal architecture is fully
differential.
The local oscillator, shifted in phase to 45° and 135°,
mixes the amplified RF to create I and Q channels.
The two I and Q channels are buffered, phase shifted by
45° and 135° respectively, amplified and recombined
internally to realize the image rejection.
Balanced signal interfaces are used for minimizing
crosstalk due to package parasitics.
The IF output is differential and of the open-collector type.
Typical application will load the output with a differential
1 kΩ load; for example, a 1 kΩ resistor load at each IF
output, plus a differential 2 kΩ load consisting of the input
impedance of the IF filter or the input impedance of the
matching network for the IF filter. The power gain refers to
the available power on this 2 kΩ load. The path to VCC for
the DC current should be achieved via tuning inductors.
The output voltage is limited to VCC + 3Vbe or 3 diode
forward voltage drops.
Fast switching, ON/OFF, of the receive section is
controlled by the hardware input RXON.
handbook, full pagewidth
VCCLNA
RFINA
RFINB
LNAGND
LNA
MIXER
IF
amplifier
MIXER
IF
amplifier
LOIN
+45o
IF
COMBINER
+135o
RXON
IFA
IFB
MGD157
Fig.3 Block diagram, receive section.
1995 Dec 13
5
5 Page 
Philips Semiconductors
2 GHz image rejecting front-end
APPLICATION INFORMATION
Product specification
UAA2077BM
1995 Dec 13
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet UAA2077BM.PDF ] | |
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