M
ODEL
SDP100 V
ERSION
V_1.00
P
REPARED BY
H/W
D
ATE
25/05/2007
S
UBJECT
T
ECHNICAL
M
ANUAL
P
AGE
62/70
SDP100
T
ECHNICAL
M
ANUAL
Page 3.62
1.
Receiver
The receiver section of MT6120 includes Quad-band low noise amplifiers(LNAs), RF quadrature mixers, an on-
chip channel filter, Programmable Gain Amplifiers(PGAs), quadrature second mixers, and a final low-pass filter.
The very low-IF MT6120 uses image-rejection mixers and filters to eliminate interference. With accurate RF
quadrature signal generation and mixer matching techniques, the image rejection of the MT6120 can reach 35dB
for all bands. Compared to a direct conversion receiver(DCR), MT6120’s very low-IF architecture improves the
blocking rejection, AM suppression, as well as the adjacent channel interference performance.
-
Receiver Input Frequency
Mode Min
Max
Unit
GSM850 869 894
Mhz
GSM900 925 960
Mhz