Method and apparatus for providing limiting transimpedance ampli

Amplifiers – With semiconductor amplifying device – Including atomic particle or radiant energy impinging on a...

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250214A, 330 59, 330110, H03F 134, H03F 308

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057083924

ABSTRACT:
A limiting transimpedance amplifier includes an amplifier stage including a feedback resistor, a limiting diode coupled across the feedback resistor, and a stabilization diode coupled to the amplifier stage to compensate for feedback instability introduced by the limiting diode. The amplifier stage includes an input transistor and an output transistor, where the feedback resistor couples an output of the output transistor to an input of an input transistor. A stabilization voltage generator is coupled to the stabilization diode to provide a stabilization voltage that causes the desired compensation. A method for providing limited transimpedance amplification includes the steps of: (a) amplifying an input current signal at an input node to develop an output voltage signal at an output node; (b) limiting the range of the output voltage signal by providing a feedback path between the output node and the input node that includes the parallel connection of a feedback resistor and a limiting diode; and (c) compensating for instability in the output voltage signal caused by the limiting diode in the feedback path.

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Khorranmabadi, Haideh et al., "A 1.06Gb/s--31dBm to OdBm BiCMOS Optical Preamplifier Featuring Adaptive Transimpedance," IEEE International Solid-State Circuits Conference, Feb. 1995, pp. 54-55 and 339.
Meyer, Robert G. "A Wide-Band Low-Noise Monolithic Transimpedance Amplifier," IEEE Journal of Solid-State Circuits, vol. Sc-21, No. 4, Aug. 1986, pp. 530-533.
Taylor, Stewart S. et al., "A 2pA/.sqroot.Hz 622Mb/s GaAs MESFET Transimpedance Amplifier," IEEE International Solid-State Circuit Conference, Feb. 1994, pp. 254-255 and 348.

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