la1136nm Sanyo Semiconductor Corporation, la1136nm Datasheet - Page 15
la1136nm
Manufacturer Part Number
la1136nm
Description
Am Tuners For Car Radios And Home Stereos
Manufacturer
Sanyo Semiconductor Corporation
Datasheet
1.LA1136NM.pdf
(28 pages)
- Current page: 15 of 28
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(5) Sample RF alignment coil selectivity characteristics (Mitsumi)
5.
Because the LA1136N and the LA1137N offer many sophisticated functions, a number of their pins are dual-purpose pins. An
example is pin 3 (on both the LA1136N and the LA1137N), which serves both as the wideband AGC input pin and the antenna
dumping pin diode drive pin. As a result, particular attention must be given to the wiring pattern layout, since feedthrough of other
signals as shown in the figure below can cause AGC to operate without input, resulting in reduced sensitivity.
New coil designs should have the same selectivity characteristics as shown below.
Problems Concerning Wideband AGC
Avoid direct
feedthrough from the
RF amplifier to the
pin 3 line.
RF characteristics at 600 kHz
LA1136N, 1136NM, 1137N, 1137NM
LA1136N/1137N Antenna, RF circuit
RF characteristics at 1.4 MHz
RF characteristics at 1 MHz
Unit (resistance:
, capacitance: F)
No. 3507-15/28
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