Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Optical communication device










Image Number 12 for United States Patent #8445832.

An optical communication device which can be operated at high speed is provided. For example, the optical communication device includes: a pre-amplifier circuit PREAMP1 amplifying a current signal Iin from a photodiode PD, and converting an amplified signal into a voltage signal; and an operating-point controller circuit VTCTL1 controlling an operation of the PREAMP1. The PREAMP1 includes a negative feedback path formed by a feedback resistance Rf1, and includes: a level-shift circuit LS1 level-shifting in accordance with an operating-point control signal Vcon; and an amplifier circuit AMP1 connected to a subsequent stage of the LS1 and performing an amplifying operation with a high gain. The VTCTL1 includes a replica circuit configured by the same circuit and circuit parameter as those of the AMP1 and electrically connected between the input and the output, and generates the Vcon so that an output DC level of this replica circuit is matched with an input DC level of the AMP1.








 
 
  Recently Added Patents
IR(voltage) drop analysis in integrated circuit timing
Gas flow indicator
Method for conformal plasma immersed ion implantation assisted by atomic layer deposition
System and method for judging success or failure of work of robot
Solar power system with communication network utilizing magnetic fields
Liquid crystal panel and liquid crystal display
Image processing system, image processing method and program for image processing
  Randomly Featured Patents
Method for starting a voltage-mode switching power supply into a biased load
Transistors having v-shape source/drain metal contacts
Barrette with swiveled hinge
Apparatus for stranding wire
Protector apparatus for telecommunications lines
Magnetic recording disk having textured surface
Adhesion improvement with methylacrylate-chromium complexes and poly(vinyl alcohol)
Portable electric fan with swivel mount
Physiological measuring system comprising a garment and sensing apparatus incorporated in the garment
Urological stent therapy system and method