公开(公告)号：US3786300A

公开(公告)日：1974-01-15

申请号：US3786300D

申请日：1971-05-17

Applicant: RCA CORP

Inventor： HILL M

IPC: H04N9/28 ,  H01J29/50

CPC classification number: H04N9/28

Abstract: Vertical rate convergence circuit provides respective waveforms for control of vertical convergence winding energization during scanning of top raster half and bottom raster half. A pair of convergence windings are interconnected with sources of the respective waveforms in a circuit arrangement providing respective potentiometers for effecting master and differential control of the individual winding currents during each raster half scanning interval. Unidirectional current conducting means in association with one or both of the differential control potentiometers serve to reduce interaction between the control settings. In one embodiment, fixed terminals of each differential control potentiometer are linked to respective convergence coil terminals by individual diodes poled to effectively open-circuit one differential control potentiometer while placing the other differential control potentiometer in circuit with the coils during top scanning, and to effect complementary operation during bottom scanning.

Abstract translation: 垂直速率收敛电路提供各种波形，用于在扫描顶部光栅半部和底部光栅一半期间控制垂直收敛线圈通电。 一对会聚绕组以电路布置与相应波形的源互连，从而提供相应的电位计，用于在每个光栅半扫描间隔期间实现各个绕组电流的主和差分控制。 与一个或两个差分控制电位器相关联的单向电流传导装置用于减少控制设置之间的相互作用。 在一个实施例中，每个差分控制电位器的固定端子通过单独的二极管连接到相应的会聚线圈端子，该二极管极化以有效地开路一个差分控制电位器，同时在顶部扫描期间将另一个差分控制电位器与线圈放置在电路中，并且实现 底部扫描时的补充操作。