| 摘要 |
<p>In a sawtooth generator for a television deflection system, first (C1) and second (C2) capacitors are coupled in series to a first terminal (500a) of a switch (U6a). When the switch (U6a) is conductive, the two capacitors are discharged by the switch to form a sawtooth signal (VO') at the first terminal (500a) having a down-ramping portion that corresponds with a retrace interval. When the switch (U6a) is nonconductive, the two capacitors are charged by a source (R2) of current to form an upramping portion of the sawtooth signal that corresponds with a trace interval. An S-shaping arrangement that is coupled to a junction terminal (703) of the two capacitors (C1,C2) includes a third capacitor (C3), two resistances (R8;R4,R5) and a clamping arrangement (D1,D2) that provide S-shaping of the sawtooth signal (VO') at both ends of the trace interval and dc restoring prior to the beginning of each trace interval.</p> |
