| 摘要 |
<p>A circuit arrangement for a picture display device for generating a sawtooth line deflection current. The arrangement comprises a power supply transformer (T) having a primary winding (L1) one end of which is connected to a terminal (+) of a supply voltage source (VB) and the other end to a controllable supply switch (Tr, D1, D5, D6) whose other side is connected to the other terminal (-) of the source, also having a secondary winding (L2) to which the series arrangement of the line deflection coil (Ly) with a trace capacitor (C,) as well as a deflection switch (Th, D2), which is also controllable, and a retrace capacitor (Cr) are coupled, both switches being conductive in operation during the trace period and cut off during the retrace period. In the retrace period the line deflection coil, the trace and the retrace capacitors are part of a resonant network the elements of which determine the duration of the retrace period. The secondary winding of the power supply transformer, the line deflection coil, the trace capacitor and the deflection switch are part of a loop to which a trace rectifier (D3) and an inductance (L), whose other end is connected to a voltage terminal (A), are connected, while a primary capacitor (C,) is coupled to the primary winding for partly determining the retrace period.</p> |
