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Bootstrap transimpedance amplifier: a new configuration

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2 Author(s)
Green, R.J. ; Postgraduate Sch. of Inf. Syst. Eng., Bradford Univ., UK ; McNeill, M.G.

In any photodetector application, capacitance is a major factor which limits response time. Decreasing load resistance improves this aspect, but at the expense of sensitivity. In the subsequent amplifier, positive feedback may be used with caution. It is possible to combine the effective stability of negative feedback with the desirable features of the positive type. An alternative approach, the bootstrap transimpedance amplifier, has been investigated. This offers the usual advantages of the transimpedance amplifier together with an effective capacitance reduction technique.

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Circuits, Devices and Systems, IEE Proceedings G  (Volume:136 ,  Issue: 2 )