Digital time variable gain circuit for non-destructive test...

Details Digital time variable gain circuit for non-destructive test... Digital time variable gain circuit for non-destructive test...

2006-07-20

2008-12-09

Williams, Hezron E. (Department: 2856)

Measuring and testing

Vibration

By mechanical waves

C073S609000, C073S614000

Reexamination Certificate

active

07461554

ABSTRACT:
In a non-destructive test instrument, there is provided a time variable gain (TVG) amplifier wherein the gain of the amplifier is dynamically changed to optimize the amplitude of a flaw echo signal. The TVG digital memory for a given TVG curve specifies and controls not only the start gain value, and the end game value, but the gain rate of change slope as well to generate TVG curve line segments.

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