WAVE-FORM TRANSFORMATION USING SHAPED SUPERCONDUCTING FILMS

This article describes a procedure to arrive at a current controlled r esistor, based on superconducting films for converting a sinusoidal cu rrent waveform of a certain magnitude into a triangular voltage wavefo rm. As an example, it describes a resistor for converting a current of 180 mu A into a triangular voltage of 22 mV. It is also shown that th is resistor can be used to obtain voltage waveforms which are very clo se to triangular waveforms for input currents in the range 18 to 180 m u A up to a frequency of 1.0 MHz. Corresponding peak output voltages o f the triangular waveform are 1.4 to 22 mV, respectively. (C) 1997 Ame rican Institute of Physics.