Voice Band Inverter

6

MX014

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4. Application

Bandpass

Filter

300-3033 Hz

Bandpass

Filter

300-3033 Hz

BIAS

C2

C3

R4

R5

R6

R3

RX Channel

RX Audio Feedback

RX Audio In

Path Invert

RX Audio Out

RX

Carrier

6dB/Octave

Pre-emphasis

10dB Gain

Bandpass

Filter

300-3033 Hz

Bandpass

Filter

300-3033 Hz

-6dB/Octave

De-emphasis

-

+

BIAS

C1

C1

R2

R7

R8

R1

TX Channel

TX Audio Feedback

TX Audio In

Path Invert

TX Audio Out

TX

Carrier

BIAS

BIAS

Note: Dotted Lines contain on-chip functions

Figure 3: Voice Privacy Application (Add-on)