MSM7557 Ver la hoja de datos (PDF) - Oki Electric Industry

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componentes Descripción

Lista de partido

MSM7557

Single Chip MSK Modem with Compandor for Cordless Telephone

Oki Electric Industry 

¡ Semiconductor

OPERATION DESCRIPTION

Limiter Circuit

A

R12

R11

+

LIM

–

Reverse

MSM7557

R11 : 1 kW

R12 : 200 kW

HPF1 or PRE – EMPHASIS

Limiter

Splatter filter

DYN = "0" : Clamp level = VSG ±0.50 V

DYN = "1" : Clamp level = VSG ±1.26 V

2. In case of using external voltage reference

LIM pin shall be supplied over VSG voltage.

Notes

1 ) R11 is protection resister from external extra voltage.

2 ) Resistor value of R11 and R12 changes 0.7 to 1.3 times from the typical value

by lot variation and temperature variation.

17/25

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