TUA6045 INFINEON [Infineon Technologies AG], TUA6045 Datasheet - Page 25

• Manufacturer Part Number: TUA6045
• Description: Low Power 3-Band Digital TV / Portable Tuner IC
• Manufacturer: INFINEON [Infineon Technologies AG]

3.4.8
For the alignment procedure of the tuner module two programmable switches are
integrated to bypass the bandpass, the SAW driver and the SAW filter. The first switch
called “IF switch” can switch between the mixer output signal and the bandpass output
signal. The second switch called “Loop thru” can switch between the signal after the first
stage of the IF AGC amplifier and the SAW filter output signal.
Figure 3
Data Sheet
IF switch, Loop thru
Functional Block Diagram of IF switch and Loop thru
MIXER
input
MIXER
Band-
pass
IF switch
SAWDRV
25
IF AGC amplifier
Loop thru
SAW
Filter
Functional Description
Loop thru control = bit 14 of sub address 03H
IF switch control = bit 15 of sub address 03H
output
IF
Revision 3.1, 2006-12-19
TUA 6045-2
TAIFUN 3