The present invention provides a golf ball comprising a core and a cover covering the core, wherein the cover is formed from a cover composition containing a non-petroleum based polyester resin as a resin component and a needle-like andor fibrous filler. Counters with variable thresholds are used to monitor the occurrence of phase transitions for a phase selection circuit to determine a preferred phase for recovery of sampled data. The line feature has a line width that is smaller than a minimum resolution of the optical projection system. The total impedance of the first and second bridge arms is smaller than that of the third and fourth bridge arms. Because there is no need to seriesparallel switch-connect the glow plug, the circuit structure is simple.