| 摘要 |
A regulated energy-conservative current source including a large inductance provides substantially all of the desired current to a deflection yoke or other load by modulation of an electronic switch which is turned on in response to the current drawn by an amplifier being above an upper threshold and is turned off in response to the amplifier current being below a lower threshold. Feedback of the load current controls the amplifier to make up the difference between the desired current and that supplied by the large inductance. Embodiments include a trigger, a differential amplifier with positive feedback, and windings coupled to the large inductance. As an energy saving adjunct in a magnetic deflection system for a CRT, bipolar embodiments, employing a single large inductance with duplicate other apparatus, provide regulated current of either polarity or zero magnitude. External feedback and local feedback embodiments are disclosed.
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