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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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TDA9105 Arkusz danych(PDF) 21 Page - STMicroelectronics |
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TDA9105 Arkusz danych(HTML) 21 Page - STMicroelectronics |
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21 / 32 page  OPERATING DESCRIPTION (continued) VERTICAL PART 27 28 29 37 38 31 25 39 PARABOLA GENERATOR SYNCHRO OSCILLATOR 34 OSC CAP DISCH. V_SYNC POLARITY SAMPLING SAMP. CAP Vlow Sawth. Disch. REF TRANSCONDUCTANCE AMPLIFIER CHARGE CURRENT 30 VERT_OUT VERT_AMP VS_AMP COR_C S CORRECTION C CORRECTION EW_AMP EW_OUT EW_CENT SPB_AMP SPB_OUT SPB_CENT V_FOCUS 1 41 42 40 Figure 21 : Vertical Part Block Diagram The vertical part generates a fixed amplitude ramp which can be affected by a S and C correction shape. Then, the amplitude of this ramp is adjusted to drive an external power stage. The internal reference voltage used for the vertical part is available between Pin 26 and Pin 24. It can be used as voltage reference for any DC adjusment to keep a high accuracy to each adjustment. Its typical value is : V26 =VREF = 8V. The charge of the external capacitor on Pin 27 (VCAP) generates a fixed amplitude ramp between the internal voltages, VL (VL =VREF/4) and VH (VH = 5/8 ⋅ VREF). TDA9105 21/32 |
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