Abstract: A sintered ferrite body having a main composition comprising 63-80% by mol of Fe2O3, and 3-15% by mol of ZnO, the balance being manganese oxide; Rcal determined from the Fe2O3 content X (% by mol) by the formula (1) of Rcal=[200(X?50)]/(3X), and the ratio R (%) of Fe2+ per the total amount of Fe in the sintered body meeting the condition of Rcal?2.0?R?Rcal+0.3; and the sintered body having a density of 4.9 g/cm3 or more.

Abstract: A sintered ferrite body having a main composition comprising 63-80% by mol of Fe2O3, and 3-15% by mol of ZnO, the balance being manganese oxide; Rcal determined from the Fe2O3 content X (% by mol) by the formula (1) of Rcal=[200(X?50)]/(3X), and the ratio R (%) of Fe2+ per the total amount of Fe in the sintered body meeting the condition of Rcal?2.0?R?Rcal+0.3; and the sintered body having a density of 4.9 g/cm3 or more.

Abstract: A GPS (Global Positioning System) receiver and a navigation device and system utilizing the same includes a receiver which sequentially generates GPS data including current position information, based on signals received from GPS satellites. The GPS receiver further includes at least one filter which performs filtering with respect to the GPS data sequentially generated by the receiver and generates positioning data including the current position information, and a positioning data output device which selects a filter according to a selection signal and outputs the positioning data in accordance therewith.

Abstract: According to the present invention, it is possible to output from a GPS receiver positioning data having a positioning precision or a positioning rate appropriate to the intended use. In the GPS receiver 1, the first filter section 13a and the second filter section 13b perform filtering with respect to the GPS data sequentially generated at the receiving section 12, and generate positioning data. The positioning precision and the positioning rate of the first filter section 13a are different from those of the second filter section 13b. According to a selection signal from a navigation device 2, the positioning data output section 14 outputs the positioning data obtained in either the first filter section 13a or the second filter section 13b to the navigation device 2.