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LM1818 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM1818 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 14 page TLH7894 April 1987 LM1818 Electronically Switched Audio Tape System General Description The LM1818 is a linear integrated circuit containing all of the active electronics necessary for building a tape recorder deck (excluding the bias oscillator) The electronic functions on the chip include a microphone and playback preamplifi- er record and playback amplifiers a meter driving circuit and an automatic input level control circuit The IC features complete internal electronic switching between the record and playback modes of operation The multipole switch used in previous systems to switch between record and playback modes is replaced by a single pole switch thereby allowing for more flexibility and reliability in the recorder de- sign Monaural operation Figure 9 Features Y Electronic recordplay switching Y 85 dB power supply rejection Y Motional peak level meter circuitry Y Low noise preamplifier circuitry Y 35V to 18V supply operation Y Provision for external low noise input transistor Typical Applications TLH7894 – 1 FIGURE 1 Stereo Application Circuit (Left Channel Shown) VS e 15V Order Number LM1818N See NS Package Number N20A C1995 National Semiconductor Corporation RRD-B30M115Printed in U S A |
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