DB118 datasheet(1/7 Pages) CMLMICRO

номер детали	DB118

подробное описание детали	Full-Duplex Audio Processing

PDF	7 Pages

Scroll/Zoom	100%

производитель	CMLMICRO [CML Microcircuits]

домашняя страница	http://www.cmlmicro.com

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FULL-DUPLEX SCRAMBLER FOR CORDLESS TELEPHONES

Figure 1 - Simplified Signal Paths

3) A 3.3 kHz inversion carrier (injection tone).

4) A 14

th order bandpass filter (300-3000 Hz).

5) Input op-amps with externally adjustable gain.

The MX118 uses CMOS switched-capacitor filter

technology and operates from a single supply in the range

of 3.0 V to 5.5 V. The inversion carrier's frequency and

filter switching clock are generated on-chip using an

external 4.433619 MHz crystal or clock input.

MX118P

MX118DW

(16 pin PDIP)

(SOIC-16)

Features

Full-Duplex Audio Processing

On-Chip “Brick-wall” Filters (300-3000 Hz)

Low Voltage CMOS

High Baseband and Carrier Rejection

Excellent Audio Quality

ECPA* Qualified Voice Protection

Applications

Cordless Telephones & Wireless PBXs

Battery Powered Portability

Description

The MX118 is a full-duplex frequency inversion scram-

bler that secures cordless telephone conversations. The

two audio paths, C1 and C2, are identical and independ-

ent. Each consists of the following:

1) A 10th order lowpass filter cut off at 3.1 kHz.

2) A balanced modulator with high baseband and carrier

rejection.

* Electronics Communications Privacy Act (Title 18 US Code 2510 et seq.).

MX118

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