Curtis Lynn Alexander

US Patent:

49087843, Mar 13, 1990

Filed:

Aug 4, 1987

Appl. No.:

7/081368

Inventors:

Gary W. Box - Golden Valley MN
Thomas S. Foote-Lennox - Bloomington MN
Rodney G. Herreid - St. Louis Park MN
James F. Hoff - Shoreview MN
Dennis J. Leisz - Minnetonka MN
John A. Perlick - Brooklyn Park MN
Terry T. Steeden - Richfield MN
John J. Turner - New Brighton MN
Curtis R. Alexander - Forest Lake MN

Assignee:

Wave Technologies, Inc. - Plymouth MN

International Classification:

G04F 800
G06F 1520

US Classification:

364569

Abstract:

The present invention relates to time measurement apparatus and method for measuring, with picosecond precision, intervals between single edged events, where each measured interval comprises the summation of a rough clock count and fine or calibrated vernier counts of measured fractional clock periods before and after each START and STOP event selected from a calibrated vernier memory. The calibrated vernier memory takes the form of a table of linear voltage versus time developed using pseudo-random generated measurement events of random duration and random separation.