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LA75710VA 데이터시트(PDF) 9 Page - Sanyo Semicon Device |
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LA75710VA 데이터시트(HTML) 9 Page - Sanyo Semicon Device |
9 / 10 page LA75710VA No.A0356-9/10 Continued from preceding page. Pin No. Pin name Function Equivalent circuit 21 AFT OUTPUT AFT output. AFT center voltage is generated by an external bleeder. The AFT gain is increased by increasing the resistance of this external bleeder resister. R ≥ 22kΩ C = 0.1 µF 22 SIF BPF OUTPUT The output to the external bandpass filter is passed through an internal 6dB amplifier before being output. 23 AUDIO OUTPUT Audio FM detector output. A 54K Ω resister is inserted in series with an emitter-follower output. For applications that support mono: Create an external deemphasis circuit. t = C 1 ×R1 24 AUDIO BIAS FILTER Connection for a filter used to hold the FM detector output DC voltage fixed. Normally, a 1 µF electrolytic capacitor should be used. The capacitance should be increased if the low band (around 50Hz) frequency characteristics need to be improved. The FM detector output level can be reduced and the FM dynamic range can be increased by inserting a resistor and a capacitor in series between pin 24 and GND. |
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