Solid laser range finder reception circuit

The amplification of this circuit is about 12000 times, the bandwidth is 0.5~14MHz, the input resistance is 700?, the output resistance is 35?(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, i..

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