Abstract
A magnetic reproducing head using parametric oscillation has been developed for perpendicular magnetic recording. The head is based on parametric oscillation in a resonant circuit comprised of a single pole type perpendicular magnetic recording head and four varactor diodes for time variable capacitance. In this paper, the reproducing principle and experimental results are described. The characteristics of the output voltage are independent of signal frequency from DC to 3 MHz. The output voltage is proportional to input signal up to 1 V.
