Solid laser range finder reception circuit

Published:2011/4/24 7:29:00 Author:Nicole | Keyword: laser range finder | From:SeekIC

The amplification of this circuit is about 12000 times, the bandwidth is 0.5~14MHz, the input resistance is 700Ω, the output resistance is 35Ω(measured with 5MHz), the output noise level is 0.6~0.8V. In figure, T1, T2 are direct coupling amplifier, they are connected into parallel current negative feedback. Zener diode 2CW11 improves T2 emitter level, it ensures the level configuration relationship between T1, T2. T3, T4 is a pair of direct coupled feedback, it belongs to voltage series negative feedback, reducing the output resistance to improve the transmission coefficient of low load resistance.



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