Resources Contact Us Home
Analog/digital converter and semiconductor integrated circuit device

Image Number 19 for United States Patent #8102289.

In the digital calibration technique of the conventional time-interleaved analog/digital converter, it is impossible to perform highly-accurate calibration that supports a high-speed sampling rate of the next-generation application and achieves a high resolution. For its solution, a reference A/D conversion unit is connected in parallel to an input common to a time-interleaved A/D converter to be a calibration target, and the output of each unitary A/D conversion unit which makes up the time-interleaved A/D converter is calibrated in a digital region by using a low-speed high-resolution A/D conversion result output from the reference A/D conversion unit. Also, fCLK/N (fCLK represents an overall sampling rate of the time-interleaved A/D converter, and N is relatively prime to the number of unitary A/D conversion units connected in parallel M) is set as the operation clock frequency of the reference A/D conversion unit. In this configuration, samplings of all unitary A/D conversion units can be sequentially synchronized with the sampling of the reference A/D conversion unit, and the operation clock frequency of the reference A/D converter can be made N times slower than the overall sampling rate of the time-interleaved A/D converter.

  Recently Added Patents
Method, apparatus, and manufacture for adaptation of video encoder tuning parameters
Light fixture
Visual physician office systems and methods
Distributed mobile access point acquisition
Headset systems and methods
Method and apparatus for belling plastic pipe
Optimization of packaging sizes
  Randomly Featured Patents
Plug mold assembly
Brace assembly for ceiling fans and fixtures
Coal gasification cogeneration process
Semiconductor memory device having dummy cells around memory cells for serving as compensating capacitor and power supply system incorporated therein
Laminated safety glass with polyurethane film
Method and apparatus for regulating data flow in networks
Surgical needle holder for securing a needle at a selected position
Mouthpiece paper for cigarettes
Head lamp for automobile
Apparatus for performance testing acceleration sensors