Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Switched bias scheme for high speed laser transmitter










Image Number 2 for United States Patent #4558465.

In a system for transmitting two level data bursts on a fiber optic (FO) bus, a circuit for turning on a light emitting diode to an excitation level induced by a current I.sub.B corresponding to the knee of the diode characteristic curve and increasing the emitted light in response to a second increasing excitation current over a second portion of the curve beyond the knee extending from excitation level I.sub.B to excitation level I.sub.M. The circuit includes first logic for exciting the diode by the first current, a light responsive device for determining when the emitted light reaches the intensity represented by the knee of the curve and induced by I.sub.B, and logic for reproducibly storing I.sub.B. Second logic responds to the excitation of the diode to the knee of its curve to further excite the diode with the second excitation current until the diode emits a desired light intensity induced by I.sub.B +I.sub.M. Logic is provided for reproducibly storing a signal I.sub.M. Switching logic supplies the current I.sub.M to the diode in response to the data bursts and supplies I.sub. B to the diode substantially concurrently with the data bursts. In the absence of the data bursts the current level I.sub.B is reduced to substantially zero.








 
 
  Recently Added Patents
Method for producing SOI substrate and SOI substrate
Method and system for delivering and executing virtual container on logical partition of target computing device
Secure provisioning of a portable device using a representation of a key
Detecting the type of NAT firewall using messages
Bacterial superantigen vaccines
Polyamide compositions
Compositions, organisms, systems, and methods for expressing a gene product in plants using SCBV expression control sequences operable in monocots and dicots
  Randomly Featured Patents
System and method for operating a billing system, and billing system
Absolute phasing circuit
Ink jet cartridge having replaceable ink supply tanks with an internal filter
Energy efficient process and apparatus for desalinizing water
Barcode systems having multiple viewing angles
Proximity sensor and control
Tractor and trailer
Information recording/reproducing device and hologram recording/reproducing method
Surface leveling tool
Engine braking method for an internal combustion engine having two serially arranged exhaust-gas turbochargers