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LS1240AL-S08-T Datasheet(PDF) 3 Page - Unisonic Technologies |
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LS1240AL-S08-T Datasheet(HTML) 3 Page - Unisonic Technologies |
3 / 5 page LS1240A LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 3 of 5 www.unisonic.com.tw QW-R108-002.I BLOCK DIAGRAM 1 2 3 4 8 7 6 5 N.C. BUZZER TELEPHONE LINE RECTIFIER CAPACITOR IN IN RECTIFIER BRIDGE THRESHOLD CIRCUIT WITH HYSTERESIS OUTPUT STAGE NONE FREQUENCY GENERATOR SWITCHING FREQUENCY GENERATOR SWEEP RATE CONTROL CAPACITOR OUTPUT FREQYENCY CONTROL RESISTOR GND TELEPHONE LINE TEST CIRCUIT R1= 27200 f1(Hz) f2=0.725f1 fSWEEP = 750 C1(nF) 2.2k 1 F 10 F C1 100nF R1 14k RL Vout VAB 85 7 1 2 3 4 UTC LS1240A *(1-0.04 In f1 1943 ) |
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