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WO2010111334A1
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Method and device for improved detection and analysis of partial discharge activity in and around high voltage electrical equipment
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WO0235248A1
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Power transformer transfer function testing
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US6633169B1
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Monitoring leakage currents from high-voltage devices
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Monitoring elements in a multi-phase alternating current network
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Reducing switching losses in a phase-modulated switch-mode amplifier
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AU5210593A
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Impedance measuring
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US5635871A
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Low phase error amplifying
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Power amplifying apparatus for supplying A.C. signals having a maximum loop gain at a desired frequency
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Automatic bridge balancing using controllable impedance in characterizing unknown impedance
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Motion tranducing through conversion of linear motion to circular motion
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US5068636A
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Current shunting
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US4973919A
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Amplifying with directly coupled, cascaded amplifiers
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US4794507A
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Controlling electrical power
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US4510354A
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Current tap selecting switch
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US4541040A
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Power converting
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US4054836A
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Transformer ratio-arm bridge with improved balancing means
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CA1004733A
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Bridge circuit
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CA939747A
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In-service bushing test
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US3568057A
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Phase measurement apparatus incorporating square wave voltage difference compensation
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US3407353A
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Method and apparatus for compensating an electrical signal transmission path
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