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Development of a wideband wattmeter as a laboratory instrumentA portable, solid state, wideband wattmeter has been developed as a general purpose type of laboratory instrument. Its circuit and component investigations and evaluation data are presented. A prototype unit was used extensively, and served as the basis for a second instrument incorporating refined circuitry and improved packaging. The wattmeter provides true four quadrant operation which permits instantaneous indication of real power as an oscilloscope display. Major performance factors are: frequency bandwidth DC to 1 MHz plus or minus 1 db; current range 10 mA to 100 amperes peak; voltage range 1 volt to 1000 volts peak; accuracy plus or minus 2% of full scale reading. Oscilloscope data for typical switching transients in a transistor inverter circuit are included.
Document ID
Document Type
Contractor Report (CR)
Landes, L. G.
(Barnes and Reinecke, Inc. Chicago, IL, United States)
Liu, Y. Y.
(Barnes and Reinecke, Inc. Chicago, IL, United States)
Date Acquired
September 2, 2013
Publication Date
September 1, 1971
Subject Category
Instrumentation And Photography
Report/Patent Number
Accession Number
Funding Number(s)
Distribution Limits
Work of the US Gov. Public Use Permitted.
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