A Dynamic focus circuit using S compensating capacitor

摘要

PURPOSE: A dynamic focus circuit using an S-correction capacitor is provided to prevent generation of heat and the increase in circuit cost by a transistor and use the s-correction capacitor to facilitate circuit design and reduce manufacturing cost. CONSTITUTION: A dynamic focus circuit using an S-correction capacitor includes a plurality of s-correction capacitors(Cs1,Cs2,Cs3,Cs4) that are connected to the primary side of a transformer(T1) coupled to a horizontal output circuit(Q1), and an amplification transistor(Q2) that is connected to one end of the secondary side of the transformer and receives vertical focus voltage through the base of the transistor to amplify the vertical focus voltage. The circuit further has bias controlling resistors(R3,R4) for controlling driving voltage applied to the base of the amplification transistor, and resistors(R1,R2) respectively connected to the collector and emitter of the amplification transistor to control amplification degree of the transistor.