Rapid method of digital automatic gain control

Details Rapid method of digital automatic gain control Rapid method of digital automatic gain control

1987-03-18

1989-02-21

Lall, Parshotam S.

Boots, shoes, and leggings

330284, 340683, 364508, H03G 320, G01L 2500, G01P 2100

Patent

active

048071676

ABSTRACT:
A method of digital automatic gain control does the required circulation without numerical multiplication or division and makes possible fast process control using a digital AGC. A signal channel has a digitally programmable variable gain device such as a multiplying digital-to-analog converter; the gain control input of the variable gain device is adjusted periodically to keep the exponential average of the digitized channel output signal with a given time constant at a desired average signal level. For instance, the vibration signal generated by a cutting process is held at a desired average prior to vibration pattern analysis to detect tool breakage and tool touch to a workpiece.

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