ICs for FM/AMTuner
AN7273, AN7273S
■ Coil Specifications
Symbol
Use, Freq.
Type No.
Maker
Connection Diagram Number of Turns Tuning Cap.
Unloaded Q
1
2
3
4
FM
Quad. Coil
10.7MHz
1 – 2 8T
2 – 3 5T
4 – 6 3T
ELF–
7S752A
90±20%
T1
Matsushita
100pF
6
4
3
2
1
1 – 2 4T
2 – 3 125T
4 – 6 7T
AM MW
Osc. Coil
ELL–
7S754
95±20%
60±30%
T2
Matsushita
Matsushita
—
6
4
3
2
1
AM Mix.
Output
455kHz
3 – 2 35T
6 – 4 10T
2 – 1 19T
EIA–
7S802A
T3
1500pF
6
■ Ceramic Filter Specification
Symbol
CF1
Use
Type No.
CFM2– 455B
Maker
Toko
Center Freq.
455kHz
Band Width
7kHz (–6dB)
Loss
AM IF
2.6dB