U2309B Datasheet, PDF (5/8 Pages) TEMIC Semiconductors – VHF/ UHF-Tuner-IC

Test and Principle Application Circuit
U2309B
Band C
I/P
UHF
Band B
I/P
VHFH
Band A
I/P
VHFL
L.O.
100p
180 ^o
180 ^o
1n 1n 1n 1n 1n 1n
Hybrids 0 / 180 degree
with 50 ohms Z(in)
and 100 ohms (2x50) Z(out)
L6
15p
VS
10n
1n 1n
IF : PC 38.9 MHz
SC 33.4 MHz
100p
L.O.
25
21
17
U2309B
Air Coils 0.6 mm
1
5
enamelled copper wire
L1 8 turns 3.0 mm dia.
L2 3 turns 2.5 mm dia. ^1p
L3 3 turns 2.5 mm dia.
L4 3 turns 2.5 mm dia.
TOKO–Coils
L5 12+2 turns ^L1
L6 6+6 turns
2p2 2p7
18
2p7 2p2
2p
BB620
L2
68p
1k
82p
BB619
9
13
1p 1p
1p
1p
L3
2k2
100p
L4
18k
The output–voltage of the
IF is calculated back to the
primary coil of L5
1n 15p _L5
1n
IF–Out
O/P
VSW
1n
18k
10n
18k
8p2 BB515
18k
VT
95 10718
Figure 2. Test and principle application circuit
PCB for the R_thJA-Measurement
Material: 35 mm one-sided Cu-coated epoxy PCB,
40 mm 40 mm 1.5 mm
R(th) SO28 U2300B
95 10719
Figure 3. PCB for the R_thJA-measurement
TELEFUNKEN Semiconductors
Rev. A2, 29-May-96
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