User Guide

NSB-5
System Module PAMS Technical Documentation
Page 66 Nokia Mobile Phones Ltd. Issue 1 03/01
First Mixer (UHF) in CRFU_2a
First mixer is a double balanced Gilbert cell with a common base input stage. This mixer
is optimized for being driven single ended. The performance of the mixer depends highly
on the application and the mixer is therefore simulated with the ”real” circuit around it.
The spread on the external components is included.
Attenuation relative to fo
1700...1830MHz
12 dB
Attenuation relative to fo
1830...1910MHz
10 dB
Attenuation relative to fo
2010...2070MHz
3dB
Attenuation relative to fo
2070...2200MHz
15 dB
Attenuation relative to fo
2200...5000MHz
30 dB
Attenuation relative to fo
5000...6000MHz
15 dB
Maximum drive level 0 dBm
Package LxWxH 3.0x3.0x2.0 mm
Vibration Total amplitude 1.52 mm, 10-
55MHz, 2 hours in each of
3 mutually perpendicular
directions
mm
Table 21: First mixer specifications
Parameter Minimum
Typical/
Nominal
Maximum Unit/Notes
Input RF frequency 1930-1990 MHz
Output IF frequency 487 MHz
Power gain (see Note 1) 6.0 8.0 dB/GSM
LO=1443-1503MHz
NF, SSB 11 dB
IIP3 -2 dBm
Input compression (1dB) -10 dBm
1/2 IF spurious n/a dBm
LO-power in RF-input -25 dBm
RF-IF isolation 20 dB
Table 20: Electrical charactistics
Parameter Min Typ Max Unit/notes