LA7583 Ver la hoja de datos (PDF) - SANYO -> Panasonic
Número de pieza
componentes Descripción
Lista de partido
LA7583 Datasheet PDF : 16 Pages
| |||
Continued from preceding page.
Pin
No.
Symbol
4 IF AGC
LA7583
Circuit Configuration
Description
Pin 4 is the 1st IFAGC filter pin. This filter
smoothes out the peaks detected in the
signal by the AGC detector, and generates
the AGC voltage. The 2nd AGC filter (lag
lead filter) is built in using filter technology.
The cutoff frequency is approximately
.500 Hz.
AGC filter constants and AGC speed
Medium-speed AGC: R1 = 330 kΩ
C1 = 0.1 µF
High-speed AGC: R1 = 470 kΩ
C1 = 0.056 µF
5 VIF INPUT
6
9 1st SIF INPUT
Pins 5 and 6 are the VIF amplifier input
pins. The VIF amplifier has three stages,
each of which uses a C cut, so when used
in conjunction with a SAW filter, DC cut by a
capacitor becomes unnecessary.
Ri = 1.1 kΩ
Ci = 3 pF
Pin 9 is the 1st SIF input pin. Input is such
that DC cut must be performed using a
capacitor. When a SAW filter, etc. is used in
the input circuit, an L that is used to
neutralize the SAW filter output capacitance
and the IC input capacitance serves to
improve the 1st SIF sensitivity.
Continued on next page.
No.5177-8/16
Share Link: 