公开(公告)号：US3891892A

公开(公告)日：1975-06-24

申请号：US42170473

申请日：1973-12-04

Applicant: RCA CORP

Inventor： BOHRINGER WALTER

IPC: H04N3/18 ,  H03K4/83 ,  H04N3/16 ,  H04N3/185 ,  H01J29/70

CPC classification number: H04N3/185 ,  H03K4/83

Abstract: A boost voltage delay circuit for deflection circuit utilizing trace and commutating switches to generate deflection current in a deflection winding. A supply voltage boost circuit derives voltage from an inductor coupled between the direct current voltage supply and the commutating switch, boosts and regulates it, and supplies this regulated boost voltage to the commutating switch. The boost voltage delay circuit monitors the commutation switching action by rectifying voltage variations appearing across the inductor to charge an R-C circuit for several cycles of commutation switching action before the voltage across the R-C circuit rises sufficiently to turn on a transistor which enables the boost voltage circuit to supply boost voltage to the commutating switch. Commutation loss due to failure of the commutating switch to become reverse biased under applied boost voltage is thereby prevented.

Abstract translation: 用于偏转电路的升压电压延迟电路，利用迹线和换向开关在偏转绕组中产生偏转电流。 电源电压升压电路从耦合在直流电源和换向开关之间的电感器导出电压，升压和调节它，并将该调节的升压电压提供给换向开关。 升压电压延迟电路通过对出现在电感器两端的电压变化进行整流来监视整流开关动作，以在RC电路两端的电压足够上升以导通使能升压电压电路的晶体管之前对RC电路充电若干周期的换向开关动作 以将升压电压提供给换向开关。 由此，可以防止由于整流开关在施加的升压电压下的反向偏置导致的换向损耗。