Valmont Industries, Inc.
System, method and apparatus for providing an in-line buried wire guidance amplifier

Abstract:

The present invention provides a filter which is configured to filter frequencies created by noise outside of the band of interest and to then amplify the filtered signal to allow a weaker signal to be used for guidance. According to a first preferred embodiment, the filter of the present invention includes a 5th order active high pass filter cascaded with a 5th order active low pass filter. According to a further preferred embodiment, the filter of the present invention preferably provides a cutoff of frequencies below 700 Hz and above 1500 Hz. According to a further preferred embodiment, the filter of the present invention further uses a voltage amplifying circuit to amplify the filtered signal.