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
Charged particle source with integrated electrostatic energy filter
Methods circuits apparatuses and systems for facilitating access to online content
Image stabilization apparatus and image pickup apparatus
Apparatus and methods for color displays
Frequency offset estimation apparatus and method of OFDM system
Device and method to automatically configure port forwarding
Recovering a database to any point-in-time in the past with guaranteed data consistency
  Randomly Featured Patents
Air handling system for engines
Electrical contact
Iron golf club head
Products and methods for the remineralization and prevention of demineralization of teeth
Slider for adjusting the position of the dual axles of a semi-trailer
Method using low spectrum selectively for providing both ADSL and POTS service
Measuring module for rapid measurement of electrical, electronic and mechanical components at cryogenic temperatures and measuring device having such a module
Pulling tool apparatus
Method for controlling a load with a predominantly inductive character and a device applying such a method
Distributed bluetooth system