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LM1818 Arkusz danych(PDF) 11 Page - National Semiconductor (TI) |
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LM1818 Arkusz danych(HTML) 11 Page - National Semiconductor (TI) |
11 / 14 page External Components (Refer toFigure 9 Monaural Application Circuit) (Continued) Component External Component Function Normal Range of Value C11 Exponentially falling or rising signal on pin 3 determines sequencing time 0 – 10 mF delay and operational mode of the recordplay anti-pop circuitry See anti- R13 0–50 kX pop diagram R14 R16 R14 and C12 determine monitor amplifier response in the play mode 1k – 100k R15 R14 and C12 determine monitor amplifier response in the record mode R15 30 kX –3 MX R16 30 kX –3 MX C12 01 mF–20 mF C13 Determines decay response on ALC characteristic and reduces amplifier pop 5 mF–20mF R17 100k – % C14 Determines time constant of meter driving circuitry 01 mF–10 mF R18 100k – % R19 Meter sensitivity adjust 10 kX – 100 kX C15 Record output DC blocking capacitor 1 mF–10 mF C16 Play output DC blocking capacitor 01 mF–10 mF C17 Changes record output response to approximate a constant current output in 500 pF – 01mF conjunction with record head impedance resulting in proper recording R21 5kX – 100 kX equalization R22 5kX – 100 kX C18 Preamplifier supply decoupling capacitor Note that large value capacitor will 01 mF – 500 mF increase turn-ON time C19 Supply decoupling capacitor 100 mF – 1000 mF C20 Decouples bias oscillator supply 10 mF – 500mF R23 Allows bias level adjustment 0 – 1 kX R24 Adjusts DC erase current in DC erase machines (for AC erase see ‘‘Stereo Application Circuit’’ Figure 1 ) L1 Optional bias trap 1 mH – 30 mH C21 100 pF – 2000 pF C22 Bias Roll-Off 0001 mF – 001 mF H1 Recordplay head 100X – 500X 70 mH – 300 mH H2 Erase head (DC type AC optional) 10X – 300X 11 |
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