It has been proven that this circuit is an effective video buffer amplifier that provides a 1.5Vp-p output on a 75 ohm load. The bandwidth is greater than 20 MHz, the DC offset (the difference between the Vbe of Q1 and Q2) is less than 0.05V, the supply voltage is ±5V or higher, and the power line should be effectively filtered.
The selection of teaching projectors, with rich and bright colors, high-resolution projectors, and high-brightness laser light sources, can meet the needs of various large and medium-sized indoor teaching scenarios in schools, and provide teachers with good projection interactive teaching.
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