Stephen G Mathis

US Patent:

7652608, Jan 26, 2010

Filed:

Dec 9, 2005

Appl. No.:

11/298035

Inventors:

Ronald F. Mathis - Ramona CA, US
Stephen R. Mathis - Menifee CA, US
Paul N. Huntley - Poway CA, US
James A. Crawford - San Diego CA, US
Barry L. Dorr - Carlsbad CA, US
William L. Floyd - Temecula CA, US

Assignee:

Photonics Products, Inc. - Murrieta CA

International Classification:

H03M 1/12

US Classification:

341155, 341110, 341126, 455307, 455337, 375254, 375364

Abstract:

A waveform acquisition system that captures and digitizes a wideband electrical signal through a bank of front end filters, frequency down converters, and conventional digitizers (A/D converters). A software algorithm reconstructs the composite input signal and applies the necessary corrections to remove the effects of hardware impairments. This approach is possible because it uses a class of filters that exhibit the quality of perfect waveform reconstruction, allowing signals whose spectral components overlap multiple filter bands, to be faithfully reconstructed. A calibration generator switched into the input port serves as a reference for quantifying and removing hardware errors. The channelized analog-to-digital converter (ADC) effectively multiplies the bandwidth and sampling rate of the conventional digitizer performance in a single channel by the number of channels in the system.

US Patent:

20040252044, Dec 16, 2004

Filed:

Apr 7, 2004

Appl. No.:

10/820168

Inventors:

Ronald Mathis - Ramona CA, US
Stephen Mathis - Menifee CA, US
Paul Huntley - Poway CA, US
James Crawford - San Diego CA, US
Barry Dorr - Carlsbad CA, US
William Floyd - Temecula CA, US

Assignee:

Photonics Products, Inc. - Ramona CA

International Classification:

H03M001/12

US Classification:

341/155000

Abstract:

A waveform acquisition system that captures and digitizes a wideband electrical signal through a bank of front end filters, frequency down converters, and conventional digitizers (A/D converters). A software algorithm reconstructs the composite input signal and applies the necessary corrections to remove the effects of hardware impairments. This approach is possible because it uses a class of filters that exhibit the quality of perfect waveform reconstruction, allowing signals whose spectral components overlap multiple filter bands, to be faithfully reconstructed. A calibration generator switched into the input port serves as a reference for quantifying and removing hardware errors. The channelized analog-to-digital converter (ADC) effectively multiplies the bandwidth and sampling rate of the conventional digitizer performance in a single channel by the number of channels in the system.