| 摘要 |
In a television receiver in which the high voltage power supply for the picture tube includes a voltage multiplier coupled between the retrace pulse output of the horizontal sweep circuit and the second anode of the picture tube, a circuit for automatically regulating the pulse output of said sweep circuit comprising a pulse transformer having a primary winding connected between the multiplier reference terminal and ground, and a rectifier and time delay filter coupled between the pulse transformer secondary winding and the grid bias circuit of the horizontal output amplifier. The pulse transformer develops voltage pulses from the multiplier which, when rectified, provide a control voltage which is a function of picture tube beam current. Application of this control voltage via the filter to the bias circuit is operative to provide the desired pulse regulation by controlling the grid bias of the horizontal output amplifier.
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