The subject invention is a valve for regulating the viscosity of fluid utilized by an integrated drive generator. A user can rotate the core and lever about an axis when a latch is disengaged from a detent. Antifuse materials having dielectric constants between 5 and 27, for example, hafnium silicon oxynitride or hafnium silicon oxide, are particularly effective. Rectangular filter circuits remove Mh time-series data at the front end and Mt time-series data at the rear end, from the transmitted signal which has been subjected to the inverse orthogonal conversion, so as to extract Nw time-series data.