Circuit for controlling the magnitude of amplification of...

Details Circuit for controlling the magnitude of amplification of... Circuit for controlling the magnitude of amplification of...

G - Physics

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G01V 1/40 (2006.01) E21B 47/00 (2006.01) G01V 1/28 (2006.01) G01V 1/52 (2006.01) H03G 3/20 (2006.01)

Patent

CA 1201797

A B S T R A C T CIRCUIT FOR CONTROLLING THE MAGNITUDE OF AMPLIFICATION OF SIGNALS PRODUCED BY A BOREHOLE TELEVIEWER An electronic circuit is provided for improving the response of a borehole televiewer in an out-of-round borehole. The circuit comprises an automatic gain control circuit having time constants that allow detection of borehole anomalies while having a fast enough rise time to adjust for the effects of out-of-roundness.

444718

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