Fast_dc_stabilized_noninverting_amplifier

Published:2009/7/23 23:46:00 Author:Jessie | From:SeekIC

This circuit combines an LT1010 (and a fast discrete stage) with an LT1008-based dc-stabilizing loop. The output depends on the setting of the gain pot. Typical specifications are shown for voltage gains of 2 and 10. The normal tendency of the Q1/Q2 stage to drift is corrected by the LT1008. This correction stage is similar to those of Figs. 1-19 and 1-20, except that the feedback is taken from a divided-down sample of the fast amplifier. The ratio of this divider should be set (by the selection of the gain-dependent resistor) to the same value as the circuit closed-loop gain (typically 2 or 10). The output is typically 1 VPP (suitable for video), and should be adjusted for optimum (with a load applied) using the peaking capacitor.



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