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
Opioid-ketamine and norketamine codrug combinations for pain management
Doherty amplifier circuit
Circuitry testing module and circuitry testing device
Microwavable bag
Systems and methods for adaptive error thresholds or adaptive modulation schemes based on atmospheric conditions
Method for accessing wireless network
Vehicle fender
  Randomly Featured Patents
Servo valve
Lubricating oil
Method of detection of output fluctuation in internal combustion engine
Drip level irrigation
Semiconductor device having multiple power-supply nodes and capable of self-detecting power-off to prevent erroneous operation
Double-cylinder two-stage compression rotary compressor
Automatic safe self-destructive disposable blood sampling device
Materials and methods for producing shot of various sizes and compositions
Electric initiator containing polymeric sulfur nitride
Method of forming gate oxide for field effect transistor