Philips Semiconductors
Product specification
Advanced modem/audio analog front-end
UCB1200
filter is determined by the selected telecom codec sample rate. This voice band filter is activated by setting
TEL_VOICE_ENA in the telecom control register B. The resulting telecom input filter curves are given in Fig.37 and
Fig.38.
The output section of the telecom codec is designed to interface with a 600
Ω
line through an isolation transformer. The
built in mute function is activated by TEL_MUTE in the telecom control register B. The output driver remains active in the
mute mode, however no output signal is produced. Loading the drivers with a capacitive load may cause high frequency
oscillations and should be done cautiously.
1998 Jul 22
12
PHILIPS [ NXP SEMICONDUCTORS ]
