Audio Band Scrambler
FX/MX128
1.5
Application
Figure 3: Block Diagram of a Typical Application of the FX/MX128 (Cordless Phone)
1.6
Application Notes
Carrier Frequency
Upper Cutoff Frequency
Lower Cutoff Frequency
=
=
=
(3.2995kHz / 10.24MHz) * XTAL frequency
(2.800kHz / 10.24MHz) * XTAL frequency
(400Hz / 10.24MHz) * XTAL frequency
Formulae for calculating the carrier frequency, upper cutoff frequency and lower cutoff frequency with
clock select pin high are as follows:
Formulae for calculating the carrier frequency, upper cutoff frequency and lower cutoff frequency with
clock select pin low are as follows:
Carrier Frequency
Upper Cutoff Frequency
Lower Cutoff Frequency
=
=
=
(3.2995kHz / 3.415MHz) * XTAL frequency
(2.800kHz / 3.415MHz) * XTAL frequency
(400Hz / 3.415MHz) * XTAL frequency
©
2003 CML Microsystems Plc
6
D/128/2
CMLMICRO [ CML MICROCIRCUITS ]
