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
Digital signal processing apparatus, liquid crystal display apparatus, digital signal processing method and computer program
Determining system for localization methods combination
State control of remote hosts for management of distributed applications
Server chassis
Managing delivery of application server content
System for seeking for an optimal configuration of a bi-, tri- or multi-ventricular cardiac resynchronization implanted device
Packet transmission system and fault recovery method
  Randomly Featured Patents
Method and apparatus for locating a movable servo controlled member during position signal drop-out
Material transport in-motion product dimensioning system and method
Process for producing polyethylene having a broad molecular weight distribution
Regulating device for handling a needle thread in a multi-needle double chain stitch sewing machine
Input mode switching system
Microscope stand, in particular for a surgical microscope
Apparatus and method for control head unloading on power down in a disk drive
Method and system for providing session pools for high performance web browser and server communications
Differential receiver of direct sequence spread spectrum signals
Document transmission and routing with recipient control, such as facsimile document transmission and routing