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
Method for adjusting a brake system of a vehicle in the event of a collision
Image sensing apparatus and control method thereof
Method and system for automatically measuring and forecasting the demographic characterization of customers to help customize programming contents in a media network
Semiconductor device and method for manufacturing the same, and amplifier
Microscopy method and microscope with enhanced resolution
Yoga mat
Sealant composition comprising a gel system and a reduced amount of cement for a permeable zone downhole
  Randomly Featured Patents
Folded liquid-crystal variable optical attenuator
Structure of a barrier in a plasma display panel
Relative timing acquisition for a radio communications system
Start/end point detection for word recognition
Method of forming a landing pad structure in an integrated circuit
Capping enzyme of flavivirus and utilization of this protein in a process to test drugs with antiviral properties
Coding circuit for recording data on DVD disk
Curable composition
Extending types hosted in database to other platforms
Method of obtaining composite materials and products, particularly for construction and building purposes, based on urea-formaldehyde resins by addition of phosphogypsum