U2320B Datasheet, PDF (4/7 Pages) TEMIC Semiconductors – VHF/UHF Tuner-IC

U2320B
Test and Principle Application Circuit
Band B
UHF
I/P
180 ^o
Hybrid 0 / 180 degree
with 50 ohms Z(in)
and 100 ohms (2x50) Z(out)
VS
Band A I/P
VHF
15p
10n
Air Coils 0.6 mm
enamelled copper wire
L1 2 turns 2.5 mm dia
L2 8 turns 3.5 mm dia
L3 3 turns 2.5 mm dia
L4 3 turns 2.5 mm dia
TOKO–Coils
L5 12+2 turns
L6 6+6 turns
Bd. I/III
1k5
BA282
820p
1n 1n 1n 1n
L6
1n 1n
IF : PC 38.9 MHz
SC 33.4 MHz
17
13
The output voltage of the
IF is calculated back to the
primary coil of L5
1
5
2p2 ^2p2 _{1p0 1p0}
BB515 _{1p0 1p0}
9
1n ^L5
15p
IF–Out
O/P
1n
L1 18k
L3
2k2 _L4
USW
BB619
L2
100p
1n
18k
68p
18k
8p2 _BB515
18k
96 11674
VT
Figure 2. Test and principle application circuit
Note: All component values must be determined application specific. For more detailed information pls. request the
application note “Semiconductors for TV-Tuners and The New EasyLink Concept”.
PCB for the R_thJA-Measurement
35 mm one-sided Cu-coated PCB,
40 mm x 40 mm x 1.5 mm.
95 10715
Figure 3. PCB for the R_thJA-measurement
4 (7)
TELEFUNKEN Semiconductors
Rev. A1, 29-May-96