Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
On-chip R-C time constant calibration










Image Number 2 for United States Patent #7548129.

An integrated tuner includes circuitry to receive a television signal, a quadrature mixer coupled to the output of the circuitry, a polyphase filter coupled to the output of the quadrature mixer, a relaxation oscillator, and a digital calibration module. The relaxation oscillator generates a clock having a period that is directly proportional to the on-chip RC time constant. The clock is fed into a counter of the digital calibration module. The counter is started and stopped at predefined time intervals by a finite state machine. The finite state machine updates the calibration code based on a successive approximation algorithm according to the end count results received from the counter. The digital calibration module outputs the updated calibration code to the polyphase filter and to the relaxation oscillator.








 
 
  Recently Added Patents
Flash drive
Signal routing dependent on a loading indicator of a mobile node
Audiovisual multi-room support
Position detection device, pointing device and input device
System and method for determining payroll related insurance premiums
Method and apparatus for predicting object properties and events using similarity-based information retrieval and modeling
Methods, systems, and physical computer storage media for processing a plurality of input/output request jobs
  Randomly Featured Patents
System and method of command processing
Apparatus for fixing a workpiece to the worktable of a machine tool
Toner cartridge
Speaker for digital media player
Vehicle traveling state recording method and computer for engine control
Canned motor pumps pressurized recirculation system
Lobularia plant named `Inlbusnowhi`
Separation of 3-carene from limonene by extractive distillation
Data communication system
Removable magnetic switch security system for buildings