Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Photoreceiver/amplifier circuit, optical pickup device, and optical disk device










Image Number 13 for United States Patent #7868702.

The subject invention provides a photoreceiver/amplifier circuit comprising a differential circuit including a differential transistor pair and a bias circuit; an active load; a feedback resistor for converting a photocurrent generated from a photodiode into a voltage; a reference resistor; and a compensation circuit. The resistance of the feedback resistor is greater than the resistance of the reference resistor. The compensation circuit supplies a compensation current from a junction between the feedback resistor and a non-inverting input terminal of the differential amplifier circuit, so as to cancel the difference between a voltage between terminals of the feedback resistor and a voltage between terminals of the reference resistor. This reduces noise and improves offset voltage characteristics. The present invention provides a photoreceiver/amplifier circuit ensuring noise reduction and desirable offset voltage characteristics.








 
 
  Recently Added Patents
Method and apparatus for map transmission in wireless communication system
Methods and systems for flicker correction
Method and system for automatically identifying wireless signal quality of a region
Method for manufacturing thin film transistor and method for manufacturing display device
Image processing apparatus, remote management system, license update method, and computer program product
Lead with lead stiffener for implantable electrical stimulation systems and methods of making and using
Atomic oscillator and manufacturing method
  Randomly Featured Patents
Detection of cancer cells in body fluids
Copying machine, control method therefor, and multi function peripheral
Thermo-magneto-optical memory device and recording medium therefor
Fully synchronous pipelined RAM
Programmable multi-channel amplitude and phase shifting circuit
Ink jet head
Mixing head for reactive materials
Method for reducing delivery latency of an image or other secondary information associated with a file
Photoacoustic analyzer
Magnetic tape with a cylindrical magnetic head housing