Resources Contact Us Home
Transimpedance amplifier with selective DC compensation

Image Number 12 for United States Patent #6784750.

A transimpedance amplifier selectively activates DC compensation to optimize a signal-to-noise ratio for an optical receiver. The optical receiver includes a photodiode that converts a light signal to an electrical current signal, and the transimpedance amplifier converts the electrical current signal to a pair of differential voltage signals for further processing. The electrical current signal is provided to the transimpedance amplifier by connecting a cathode of the photodiode to a first input amplifier via a DC blocking capacitor and by directly connecting an anode of the photodiode to a second input amplifier. The transimpedance amplifier includes a DC correction circuit that generates a correction current when an output of the first input amplifier exceeds a predefined threshold. The correction current is added to an input of the second input amplifier to adjust a DC offset at an output of the second input amplifier.

  Recently Added Patents
Watch chain
Sense-amplifier monotizer
Social community generated answer system with collaboration constraints
Sacrificial spacer approach for differential source/drain implantation spacers in transistors comprising a high-k metal gate electrode structure
Television apparatus
Method of allocating IP address of image forming apparatus using DHCP, image forming apparatus and system of allocating IP address using DHCP
Toilet bowl
  Randomly Featured Patents
Method and system for wirelessly autodialing a telephone number from a record stored on a personal information device
Air pumping system for an automotive seat
Emergency-locking type retractor provided with a take-up force locking mechanism
Swivel apparatus for fluid transport
Retroviral protease inhibitors
Software self-repair toolkit for electronic devices
Shape memory polymers formed by self-crosslinking of copolymers
Compensation for edge effects and cell gap variation in tiled flat-panel, liquid crystal displays
Hologram display item
Conductive fine particles and anisotropic conductive material