| 摘要 |
<p>A transformer coupled amplifier drive circuit (40,60) and method especially suited for providing a saw-tooth current waveform to an inductive load (32) for horizontal deflection applications in CRT monitors and the like are described. When the input switch (44) is closed, the input of the amplifier (26) is energized by a current (45,65) through the series connected primary (48) and energy is stored in the transformer (46) magnetizing field and in the amplifier (26). Conduction in the transformer (46) secondary (50) is blocked by the diode (56). When the input switch (44) is opened, the input charging current (45, 65) stops and the collapsing primary (48) magnetizing field produces an oppositely directed current (47,67) which flows through the secondary winding (50), the diode (56), the series connected inductor (52) and the input to the amplifier (26). The demagnetization energy stored in the transformer (48) cancels the energy stored in the amplifier (26), thereby reducing total dissipation, and the inductor (52) controls the fall time independent of the rise time.</p> |
