Amplifiers – With semiconductor amplifying device – Including atomic particle or radiant energy impinging on a...
Patent
1999-02-08
2000-05-02
Pascal, Robert
Amplifiers
With semiconductor amplifying device
Including atomic particle or radiant energy impinging on a...
330110, 250214A, H03F 308, H03F 136
Patent
active
06057738&
ABSTRACT:
An optical receiver preamplifier provides a transimpedance feedback path between the output node and the input node that comprises a feedback resister and the two diodes are coupled ("paralleled") in opposite direction. While the input current signal is too large, and the voltage reach the diode's threshold voltage. The preamplifier can provide current path passing the signal to solve the problem that charge-discharge time is not uniform and changed over duty-cycle. Further, the two diodes are coupled ("paralleled") in opposite direction make photo-diode working under the large-signal current by anode or cathode input. Thus, increase the dynamic range of the transimpedance preamplifier. Besides, the low impedance of series resistance connects with input node and feedback network. The influence of bandwidth and stability that the aforementioned two paralleled diodes resulted in diode junction capacitor will reduce due to the low impedance of series resistance. And more specifically, in high-speed application, also increase the impedance of series resistance.
REFERENCES:
patent: 4350959 (1982-09-01), Rosenbaum
patent: 5708392 (1998-01-01), Gross
Ku Chung-Chiang
Lin Chao-Hui
Industrial Technology Research Insititute
Nguyen Patricia
Novick Harold L.
Pascal Robert
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