The front time of the partial discharge pulse within the GIS is generally within 1 ns. This article studies the fast front pulse generation circuit with the pulse front within 1 ns. It can simulate the partial discharge signal andit is used in experiments that require partial discharge signals. This article uses the avalanche effect of the transistor. Theamplitude of the pulse signal generated during the avalanche operation of the transistor is high

and the leading edge timeis short

and the requirements of the leading edge within 1 ns can be achieved. Select BFP450 type avalanche triode

make the circuit board to measure the pulse signal

can get the UHF pulse voltage signal

and carry on the transmis-sion through the UHF aerial. Through the pulse generation circuit designed in this paper

the fast front pulse signal with the amplitude of about 4 V

the repetition frequency of 20 kHz and the front edge time of 1 ns can be obtained.