A motor drive loop circuit for a micro-electro-mechanical system gyroscope is provided. First, in order to reduce the cycle of the cogging torque to one-half the cycle of the basic cogging torque, a basic configuration of the core is determined by setting opening angles of its slots to an appropriate electrical angle ranging from 80 to 95 and from 20 to 35. The surface treatments prevent the underfill material from wetting the carrier substrate panel and therefore encroachment upon the inter-die area. All DSP instructions of the ISA are dyadic DSP instructions performing two operations with one instruction in one cycle. The catalyst serves to prepare aldehydes, carboxylic acids andor carboxylic anhydrides from aromatic or heteroaromatic hydrocarbons by gas phase oxidation.