Abstract: A temperature of an electronic circuit device such as an integrated circuit is measured with high accuracy. The electronic circuit device (10) includes a main processor (20) and a temperature measurement module (30). The main processor (20) can execute predetermined signal processing. The temperature measurement module (30) generates a signal having a correspondence relationship with the temperature of the main processor (20) under a mode in which the temperature measurement module is driven at a predetermined low power consumption or less and the thermal resistance between the temperature measurement module and the main processor (20) is a predetermined thermal resistance value or less.

Abstract: An existence of multipath is detected accurately based on not only a C/No. A C/No (iv) of a reception signal, a pseudorange PR(iv), and a delta range DR(iv) are acquired (S101). First, as determination processing based on individual measurement values, thresholds are set thereto respectively, and the existence of multipath is detected (S102-S104). Next, as determination processing based on continuous values, an average value C/No(Av) and a standard deviation ?C/No of the C/No, and an average value DV(Av) and a standard deviation ?DV of the difference values are calculated, thresholds are similarly set thereto respectively, and the existence of multipath is determined (S105-S109). Then, if multipath is determined that it does not exist based on the individual measurement values and the continuous values, it is determined ultimately that multipath does not exist (S110).

Abstract: A pseudorange is estimately calculated in high accuracy without being influenced by multipath. Multipath is determined based on a C/No and a difference value DV(iv) that is a difference value between a time change of an observed pseudorange and a delta range (S101-S103). If multipath does not exist (S104: NO), an error variance of the pseudorange and an error variance of the delta range are set to fixed values, and a weight coefficient is determined (S105). If multipath exists (S104: YES), a variance of the difference value and the variance of the delta range are calculated (S106), a variance of the pseudorange is calculated (S107), and the weight coefficient is determined based on the calculated variances of the pseudorange and the delta range (S108). Further, the pseudorange is estimately calculated by a weighted hatch filter through using the determined weight coefficient (S109).

Abstract: A GPS receiver is alternately switched between sleep conditions under which between sleep conditions under which a temperature-compensated crystal oscillator is shut off for a specific sleep time while a real-time clock section is kept operational and normal operating conditions under which both the temperature-compensated crystal oscillator and the real-time clock section are kept operational. The GPS receiver determines the ratio of the number of pulses of a reference clock signal to the number of pulses of a low-frequency clock signal counted during a specific period of time preceding the sleep time. The GPS receiver estimates a count value which should have been reached by a reference clock counter at the end of the sleep time if the temperature-compensated crystal oscillator continuously generated the reference clock signal based on the number of pulses of the low-frequency clock signal counted during the sleep time.

Abstract: A GPS receiver is alternately switched between sleep conditions under which between sleep conditions under which a temperature-compensated crystal oscillator is shut off for a specific sleep time while a real-time clock section is kept operational and normal operating conditions under which both the temperature-compensated crystal oscillator and the real-time clock section are kept operational. The GPS receiver determines the ratio of the number of pulses of a reference clock signal to the number of pulses of a low-frequency clock signal counted during a specific period of time preceding the sleep time. The GPS receiver estimates a count value which should have been reached by a reference clock counter at the end of the sleep time if the temperature-compensated crystal oscillator continuously generated the reference clock signal based on the number of pulses of the low-frequency clock signal counted during the sleep time.

Abstract: The present invention relates to a bar code printing or reading apparatus that includes a hand-held bar code printer and a portable computer or a bar code reader connected to a side of the computer. The bar code printer has a front horizontal surface and vertical plates to form a concave or recessed portion in which the portable computer is received. This recessed portion supports the computer. The portable computer and the bar code printer are optically coupled so that signals from the computer are optically transferred to the bar code printer and vice versa.