| 摘要 |
1333164 Correcting sawtooth waveforms RCA CORPORATION 15 Jan 1971 [27 Jan 1970] 2095/71 Heading H3T The sawtooth current in a deflection yoke is linearized by connecting a first inductor and a saturable inductor in parallel and in series with the yoke, the inductors being conductive for non-coincidence periods. The Figure shows a sawtooth current generator in which, during the first part of the stroke, the energy in the deflection coils 31 is discharged via a diode 30 and a large capacitor 49. The resistance voltage drop adds to the changing voltage 'across the capacitor and linearity correction is not necessary. At some point during the stroke a thyristor 29 is fired. The yoke current reverses and passes through a diode 43 and a saturable inductor, the impedance so changing with yoke current as to effect linearity correction. In Figs. 2 and 3 inductor 41 is connected to a tap on the saturable inductor and the diode is connected in reverse sense in series with the non-saturating inductor. Thyristor 21 is for commutating thyristor 29 Transformer 50 supplies the E.H.T. circuit. |
