Lin Wu

US Patent:

6456211, Sep 24, 2002

Filed:

Jan 8, 2001

Appl. No.:

09/757106

Inventors:

Lin Wu - Ames IA
Richard Knight Hester - McKinney, Collin County TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H03M 110

US Classification:

341120, 341155

Abstract:

A system ( ) for calibrating data converters ( ) includes a data converter ( ) that receives an input signal and generates one or more pre-digital error correction codes from the input signal. A calibrator ( ) receives the pre-digital error correction codes, formulating one or more transition voltage expressions using the pre-digital error correction codes, and compares the transition voltage expressions to one or more measured transition voltage values to generate one or more calibrated values. More specifically, the data converter ( ) may be a pipelined analog-to-digital converter ( ).

US Patent:

6768356, Jul 27, 2004

Filed:

Sep 7, 2000

Appl. No.:

09/656763

Inventors:

Lin Wu - Ames IA
William C. Black - Ames IA

Assignee:

Iowa State University Research Foundation, Inc. - Ames IA

International Classification:

H03L 706

US Classification:

327156, 327158, 327245, 327251

Abstract:

In accordance with a preferred embodiment, a time-interleaved (or multi-phase) architecture is provided having individual control of a plurality of output signals or phases. The time-interleaved architecture may be implemented using a first set of delay cells such as those in a ring oscillator or a delay line device receiving overall control of its output signals by a global control signal. The global control signal may be issued by a phase-locked loop, delay-locked loop, or other like structure. A second set of delay cells is provided to further delay the output signals produced by the first set of delay cells. The second set of delay cells are controlled by individual control signals uniquely calibrated in accordance with a preferred embodiment of the invention to provide uniform (or substantially) uniform time spacing between output signals.