Patent ID: 8368024

Claim:
A system for attenuating electrical noise, the system comprising: a lens; an input device for receiving an input image signal after passing through said lens; a first chopping device for splitting said received input signal into two separate time-phased input signals; two detectors of opposite polarity, each detector receiving one of said two separate time-phased input signals and providing an electric current output signal; a first superimposing device to superimpose the two electric current output signals and forming a single detected signal; a preamplifier, having at least two inputs and an output, with the preamplifier inputs receiving a reference signal and the single detected signal; a second chopping device, synchronized to said first chopping device, for providing normal and inverted amplification signals; and a second superimposing device to superimpose said normal and inverted amplification signals and provide a superimposed and restored input signal.