The following is the circuit diagram of [AN5521 Field Scanning Power Amplifier Application Circuit] AN5521 pin function description: 1 foot: 0V - ground 2 feet: 14V - field output 3 feet: 27V - field output power 4 feet: 0.8V - field pulse input 5 feet: -0.2V - retrace start pulse input 6 feet: 1V - pump power output 7 feet: 27V - power supply Silicon Transistor are solid-state semiconductor devices with functions such as detection, rectification, amplification, switching, voltage regulation, and signal modulation. The transistor acts as a variable current switch and can control the output current based on the input voltage. Unlike ordinary mechanical switches (such as Relay and switch), transistors use electrical signals to control their opening and closing, and the switching speed can be very fast. The switching speed in the lab can reach more than 100GHz. Silicon Transistor, Power Transistor, IGBT Transistor, N-Channel Transistor, PNP Transistor YANGZHOU POSITIONING TECH CO., LTD. , https://www.cnpositioning.com