TCM4400E Datasheet, PDF (29/64 Pages) Texas Instruments – GSM/DCS BASEBAND AND VOICE A/D AND D/A RF INTERFACE CIRCUIT

TCM4400E
GSM/DCS BASEBAND AND VOICE A/D
AND D/A RF INTERFACE CIRCUIT
SLWS082A – JULY 1999 – REVISED MARCH 2000
PRINCIPLES OF OPERATION
baseband downlink path (continued)
10
0
– 10
– 20
– 30
– 40
– 50
– 60
– 70
– 80
0
50
100
150
200
f – Frequency – kHz
Figure 10. Downlink Digital Filter Frequency Response
0.4
0.2
0
– 0.2
– 0.4
0
10
20
30
40
50
60
70
80
f – Frequency – kHz
Figure 11. Downlink Digital Filter In-Band Response
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