40_MHz_fiber_optic_receiver_with_adaptive_trigger

Published:2009/7/24 21:05:00 Author:Jessie | From:SeekIC

Figure 5-32 shows a circuit that will reliably condition fiber-optic inputs up to 40 MHz with input amplitudes that vary by as much as 40 dB. The digital output features an adaptive threshold trigger which accommodates varying signal intensities. An analog output is also available to monitor the detector output. Figure 5-33 shows the results of using the test circuit in Fig, 5-32. Trace A is the pulse-generator output. Trace B is the A2 output (analog output monitor). Trace C is the LT1016 output. These waveforms were recorded with a 5,ptA photocurrent at about 20 MHz. LINEAR TECHNOLOGY, APPLICATION NOTE 47, P. 44.



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