LA1193M Sanyo Semicon Device, LA1193M Datasheet - Page 10

• Manufacturer Part Number: LA1193M
• Description: High-Performance FM Front End for Car Radios
• Manufacturer: Sanyo Semicon Device

3D-AGC Features
The narrow AGC sensitivity, which operates for ∆f of less than 1.5 MHz, is
controlled independently according to the field strength of the desired
station.
The narrow AGC sensitivity is controlled at V20 values under 2 V.
The wide AGC operates even when V
station does not exist.
The N-AGC and the W-AGC sensitivities can be set independently.
The system has two AGC systems, the N-AGC and the W-AGC.
3D-AGC Sensitivity, ∆f and V20 Characteristics
— The W-AGC sensitivity is determined by the antenna RF circuit selectivity independently of V
— The N-AGC sensitivity is determined by the antenna, RF and mixer circuit total selectivity when V
— The improvement in two-signal sensitivity suppression is the shaded area in the total AGC sensitivity and
or greater. It is determined by that selectivity and V
corresponds to the section occupied by the N-AGC.
Feature
Figure 3 3D-AGC Sensitivity, ∆f and V20 Characteristics
20
is zero, i.e., when the desired
LA1193M, 1193V
20
• This is effective as a measure for mitigating two signal sensitivity
• This allows two signal sensitivity suppression to be mitigated without
• This allows the prevention of incorrect stopping on intermodulation
• This allows the prevention of intermodulation occurring in the antenna
• This allows optimal settings to match the reception field conditions.
• Since the narrow AGC operates at the desired station and at adjacent
when V
suppression.
deterioration in the three signal characteristics.
signals during search.
and RF modulation circuits in the presence of strong interfering stations.
Prevention of blocking oscillation due to AGC operation is also possible.
stations, it is possible to reduce the wide AGC sensitivity. This prevents
incorrect AGC operation due to local oscillator injection.
20
is over 0.6 V.
Merit
20
.
No. 4715-10/21
20
is 0.6 V