초록 ▼

A cellular phone receives a position measurement result, which indicates a position of the cellular phone determined based on both GPS satellite information and CDMA base station information, from a location information server. Then, when a value indicated by uncertainty information of the position

A cellular phone receives a position measurement result, which indicates a position of the cellular phone determined based on both GPS satellite information and CDMA base station information, from a location information server. Then, when a value indicated by uncertainty information of the position measurement result is greater than a first threshold value, the cellular phone receives another position measurement result, which indicates the position of the cellular phone determined based only on the CDMA base station information, from the location information server and displays it on a display device.

대표청구항 ▼

A cellular phone receives a position measurement result, which indicates a position of the cellular phone determined based on both GPS satellite information and CDMA base station information, from a location information server. Then, when a value indicated by uncertainty information of the position

A cellular phone receives a position measurement result, which indicates a position of the cellular phone determined based on both GPS satellite information and CDMA base station information, from a location information server. Then, when a value indicated by uncertainty information of the position measurement result is greater than a first threshold value, the cellular phone receives another position measurement result, which indicates the position of the cellular phone determined based only on the CDMA base station information, from the location information server and displays it on a display device. symmetry circuit at a common node and operable to supply a current. 5. The apparatus of claim 2, wherein said delay circuit and said symmetry circuit are further cooperable to provide said output signal waveform with a magnitude that is insensitive to a variaton in operating voltage for said delay circuit and said symmetry circuit. 6. An apparatus for providing an output signal waveform responsive to an input signal waveform, comprising: an input adapted to receive said input signal waveform; an output adapted to output said output signal waveform; a delay circuit coupled between said input and said output; and a symmetry circuit coupled to said delay circuit and cooperable therewith to produce a gain characteristic between said input and said output that provides said output signal waveform with approximately symmetrical rising and falling edges, wherein said delay circuit comprises a first MOS transistor and a second MOS transistor coupled to said input, and wherein said symmetry circuit comprises a first MOS transistor and a second MOS transistor coupled to said output, wherein said gain characteristic is determined by one of a ratio of a transconductance of said delay circuit first MOS transistor and said symmetry circuit second MOS transistor and a further ratio of a transconductance of said delay circuit second MOS transistor and said symmetry circuit first MOS transistor, and wherein said MOS transistors are sized to provide approximately equal gain for each of said ratios.