LA1781M_09 Datasheet, PDF (42/48 Pages) Sanyo Semicon Device – For Car Radios Single-Chip Tuner IC

Input Circuits for Each Stage
LA1781M
[FM]
• Mixer input
• First IF input
75Ω ^0.022μF
63
75Ω
64
75Ω
300Ω ^0.022μF
56
75Ω
VIN
Actual
measurement
fr = 10.7MHz
• IF input
75Ω
300Ω ^0.022μF
75Ω
fr = 10.7MHz
330Ω
0.022μF
[AM]
• First mixer input
50Ω
0.022μF
62
50Ω
fr = RF
51
50
• Second mixer input
50Ω
0.022μF
49
50Ω
fr = 10.71MHz (f2nd osc + 0.45MHz)
• IF input
50Ω
0.022μF
52
50Ω
fr = 450kHz
• Del input
50Ω
IFT
0.022μF
45
50Ω
fr = 450kHz
No.6038-42/48