Design Hybrid Tuner PCB Board
Infineon MOPLL Tuning chip TUA6039-2 OR TUA6037 can realize the super low cost hybrid tuner PCB board design, this kind of chip ULC tuner will integrate radio frequency and IF circuit which is working in 5V or 3.3V, power consumption will decrease 34%. Design single layer PCB Board can further low down the systematic cost and deal with mixed signal such as DVB-T/PAL/SCALE, ISDB-T/NTSC and ATSC/NTSC which can support barely all of the standards globally.
Below figure apply TUA6039-2/TUA6037 design single conversion tuner, this tuner is actually a RF tuner, as well as a half NIM, since it includes IF module, RF input signal through a simple High-pass filter plus combination of IF and CB traps.
apply TUA6039-2 or TUA 6037 single conversion tuner structure
The hybrid tuner PCB Board design does not use PIN diodes for band switching. Instead, it uses a very simple three-phase circuit for band switching. The antenna impedance is transformed through a high-inductance coupling circuit to the tuned input circuit. The pre-selected signal is then amplified through Infineon’s high-gain half-bias MOSFET BF5030W. The BG5120K dual MOSFET can be used in two VHF frequency bands.
In the subsequent tuned band-pass filter circuit, channel selection and suppression of excess signals such as adjacent channels and video frequencies are performed. The capacitive image frequency compensation circuit of the preceding tracking trap and band-pass filter is specifically designed to suppress the image frequency.
