| 摘要 |
<p>The horizontal deflection circuit for a television receiver is designed without a transformer so that the chassis is not voltage. The mains ac is rectified directly without a transformer and applied to a pump stage. THe pump stage is coupled via a line transformer to the line output stage. Whilst the pump stage is connected electrically to the mains supply, the line output stage and the control circuits for the line output stage and for the pump stage are all electrically isolated from the ac mains. This isolation is achieved using three isolation transformers. The first (2) is between the pump (P) and line stage (Z), the second (1) is between pum p stage and its control circuit, and the third (3) between the line stage and its control circuit.</p> |
