Abstract: Provided is a semiconductor temperature sensor having satisfactory linearity of an output voltage with respect to temperature. In a semiconductor temperature sensor (1), even if the temperature increases and a leakage current is generated at bases of a PNP (8) and a PNP (9), a current which flows into emitters of a PNP (7) and the PNP (8) is not affected by the leakage current by virtue of a leakage current compensation current of a PNP (14), and thus, the linearity of the output voltage with respect to the temperature is improved and the accuracy of the semiconductor temperature sensor (1) with respect to the temperature is improved.

Abstract: The PLL circuit includes: a voltage control oscillating circuit including: a voltage-current converter circuit; a current adder; and a current control oscillating circuit, the voltage control oscillating circuit outputting a pulse having a frequency corresponding to a control voltage and a control current; a phase detector which outputs a first control signal and a second control signal based on a phase difference between the pulse and a reference pulse having a frequency which should be generated by the voltage control oscillating circuit; a first charge pump circuit which outputs one of a first charge current and a first discharge current in accordance with the first control signal; a loop filter which generates the control voltage in accordance with the one of the first charge current and the first discharge current, and then outputs the generated control voltage to the voltage control oscillating circuit; and a second charge pump circuit which generates the control current serving as one of a second charg

Abstract: Provided is a semiconductor temperature sensor having satisfactory linearity of an output voltage with respect to temperature. In a semiconductor temperature sensor (1), even if the temperature increases and a leakage current is generated at bases of a PNP (8) and a PNP (9), a current which flows into emitters of a PNP (7) and the PNP (8) is not affected by the leakage current by virtue of a leakage current compensation current of a PNP (14), and thus, the linearity of the output voltage with respect to the temperature is improved and the accuracy of the semiconductor temperature sensor (1) with respect to the temperature is improved.

Abstract: A dampening water controller for controlling the concentration of an etching solution in dampening water circulatively used in offset printing, includes an ion concentration measuring means capable of measuring the concentration of at least one kind of ion (object ions) selected from specific anions or cations contained only in an etching solution in dampening water. Information on the measured concentration of the ions in the dampening water is output. A dampening water temperature measuring device capable of measuring the temperature of the dampening water and outputting information on the measured temperatures is provided. Also, an ion concentration information correcting device is provided capable of correcting the information on the measured concentration of the ions in the dampening water, in accordance with the information on the measured temperature of the dampening water.