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CXA1552M Scheda tecnica(PDF) 10 Page - Sony Corporation |
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CXA1552M Scheda tecnica(HTML) 10 Page - Sony Corporation |
10 / 16 page —10— CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P 5) MPX filter termination and C1 for VCC/2 (Pin 4) The MPX (multiplex) filter termination method shown in Fig. 1 allows saving the coupling capacitors between the buffer amplifiers and MPX filters. However, the channel to channel separation and REC to PB crosstalk of low frequency signals will be degraded by the termination resistor RT. For example, 5 k Ω of R1 will degrade the channel to channel separation to 50 dB. Better separation can be obtained by increasing the capacitance of C1 (Pin 4) to 220 µF or 470 µF. The allowable minimum value of C1 is 47 µF, and 100 µF is the standard recommended value. Larger values of C1 are generally desirable in order to improve the crosstalk and ripple rejection ratio. 6) Application for dubbing cassette decks The CXA1550 series generates non decoded signal at the recoding output in the playback (decode) mode, and can simplify the structure of dubbing decks. See the Sony’ Dolby B/C type IC (CX20187/CXA1097Q or CX20188/CXA1098Q) data sheet in detail. Fig. 1 1 2 3 4 13 14 15 16 CXA1550 Series C1 470 µ C21 4.7 µ C11 4.7 µ RT RT Line Input Line Input Buffer Buffer MPX Filter MPX Filter |
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