Three-dimensional model for analog circuit instruction

Conventional instruction on analog circuits has been based essentially on quantitative analytical methods. These methods are specially suited for analysis purposes; however, the process itself often obscures the desired intuitive understanding of the major aspects of the behavior of devices and circuits. Moreover, the graphs commonly utilized to depict the results of the analyses are not always suitable for a clear reading. This is particularly true for first-year BSc undergraduates. The paper suggests a visual instruction method, based on an animated three-dimensional display of circuit operation, called 3D-Schema. While a conventional schematic diagram is two-dimensional in nature, 3D-Schema adds a third dimension, using perspective, to provide an apparent display of circuit node voltages.