H - Electricity – 03 – F
Patent
H - Electricity
03
F
330/52
H03F 17/00 (2006.01)
Patent
CA 2025817
GECAN 3058 SWITCHED WIDE DYNAMIC RANGE AMPLIFIER Abstract of the Disclosure There is disclosed an amplifier switchable between transimpedance modes and a follower mode of improved dynamic range for use in a receiver of an optical electric circuit. The amplifier circuit includes a photodiode, an amplifier stage, and first and second feedback paths. The amplifier stage has an input connected to the transducer to amplify the electrical signals and has an output. The first, resistive, feedback path is coupled between the output and the input of the amplifier. The second feedback path is responsive to the gain of the electrical signals at the output of the amplifier stage and is selectively coupled and uncoupled across the input and output of the amplifier stage. The second feedback path has a resistance less than the resistance of the first feedback path and has a capacitance coupled to ground from at least a portion of the resistance to determine a mode cross-over frequency. The amplifier switches its feedback from the first feedback path to the second feedback path to improve the dynamic range of the amplifier.
Dion Bruno Y.
Roy Dany J.
Dion Bruno Y.
Eg&g Canada Ltd.
Riches Mckenzie & Herbert Llp
Roy Dany J.
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