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天饋防雷器使用方法
天饋防雷器使用方法
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壓敏電阻用于三極管的過壓保護

發布日期:2021-02-08瀏覽次數:742標簽:天饋防雷器使用方法

該裝配的運用電路如圖2所示。在晶體管電視機中,行輸出和幀輸出管都接有較大的電感線圈,在開關電視機的瞬間,線圈兩端會爆發瞬間過電壓,為了確保晶體管的恬適任務,可在三極管vt的c-e極之間接上一只壓敏電阻my。壓敏電壓的拔取應高于任務電壓,又要低于晶體管bg的耐壓bvceo或bvcer值。

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