Video card compatible holding circuit

摘要

A transistor connected to a base group and a vertical output section.And a Jenner diode that connects the transistor to the vertical output adverb.The resistance (R2) connected between the power supply (VCC) and the power supply (Q1) of the flag on transistor (Q1) andThe vertical output value is lower than the zener diode DZ1 value, including the transistor Q2 connected to the collector terminal of the transistor Q1 and the resistor R3 connected between the collector terminal of the transistor Q2 and the power supply Vcc. When the base of the transistor (Q1)Danyi's abnormal trend (Q1) turns around. When the value of vertical output is higher than the price of the Jenner diode (DZ1), the Jenner diode (DZ1) is connected, and the transistor (Q1)'s bass is composed of the video card number circuit with advantages.Regardless of the vertical signal, it always provides 4-5vpp vertical motor signal, which is independent of the vertical signal of the microwave processor.