Microsoft Technology Licensing, LLC

South China University of Technology

Shan Gao

Bin Li

Zhijian Chen

Choong Soon Chang

Zhaohui Wu

Muwu Hou

Yuan Xu

Hongbin Wu

Guangyin Feng

A calibration method and a tuning method for an on-chip differential active RC filter are provided. The calibration method comprises: obtaining zero-crossing time of a differential signal outputted by a single-pole point real number filter by analyzing the single-pole point real number filter; setting a reference clock period according to the relationship between the zero-crossing time and the bandwidth of the single-pole point real number filter, and setting a calibration working time sequence according to the reference clock period; and scanning an RC configuration of an RC array according to the calibration working time sequence to realize calibration of the RC array.

Calibration method and tuning method for on-chip differential active RC filter

Methods, systems, and computer programs are presented for improving search speed and quality using differential indexing. One method includes an operation for building a first index for a database, the first index being for first tokens resulting from normalizing words in input data. Further, the method includes building a second index for the database, the second index being for second tokens comprising words of the input data eliminated from the first index during the normalizing. The method further includes operations for receiving a raw query for a search of the database, and for generating a search query based on tokens of the raw query. The search query comprises a combined search of the first index and the second index. A search is performed based on the search query, and results of the search are returned for presentation on a display.

Differential indexing for fast database search

Growing community of inventors

Guangdong, China

Shan Gao