Circuit arrangement having a transimpedance amplifier...

Details Circuit arrangement having a transimpedance amplifier... Circuit arrangement having a transimpedance amplifier...

2005-09-27

2005-09-27

Nguyen, Patricia (Department: 2817)

Amplifiers

Miscellaneous

Amplifier protection means

C330S291000

Reexamination Certificate

active

06949977

ABSTRACT:
A circuit arrangement is provided which has the advantage of limiting the magnitude of the current to a transimpedance amplifier (TIA) circuit or a current to voltage converter during an overdrive condition, thereby preventing an amplifier of the TIA circuit from non-linear operation and from outputting high output currents. The circuit arrangement further prevents the generation of thermal tails which may cause the loss of data in memory circuits. The circuit arrangement limits the magnitude of the current to the TIA circuit during the overdrive condition by utilizing a current limiter circuit having a Schottky bridge. The Schottky bridge provides an open circuit arrangement between the TIA circuit and a current source when the overdrive condition occurs.

REFERENCES:
patent: 4791314 (1988-12-01), Kuo et al.
patent: 4952795 (1990-08-01), Gauthier et al.
patent: 4956565 (1990-09-01), Bahlmann
patent: 5761317 (1998-06-01), Pritchard
patent: 6108183 (2000-08-01), Beene
patent: 6127885 (2000-10-01), Colangelo

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