Low Band Splitter
~National ~ Semiconductor Active Filters AF103 Low Band Splitter General Description The AF103 is a fourth order elliptic low pass filter designed to reject frequencies above 1200 Hz and pass signals· below 950 Hz. This filter is used to separate the low band of frequencies from the high band in a Dual Tone Multi Frequency (DTMF) Touch Tone® receiver. The...
National Semiconductor