Abstract: An oscillation apparatus includes a correction circuitry including a first amplifier and a second amplifier, and an oscillation circuitry. The first amplifier amplifies a difference between a first voltage having a first temperature characteristic and a second voltage having a second temperature characteristic different from the first temperature characteristic to generate a third voltage having a third temperature characteristic different from both the first temperature characteristic and the second temperature characteristic. The second amplifier amplifies a difference between a sum of the second voltage and the third voltage, and, a feedback voltage, to generate a fourth voltage which corrects an oscillation frequency of an oscillation voltage. The oscillation circuitry outputs the oscillation voltage controlled in frequency based on the fourth voltage.

Abstract: An oscillation apparatus includes a correction circuitry including a first amplifier and a second amplifier, and an oscillation circuitry. The first amplifier amplifies a difference between a first voltage having a first temperature characteristic and a second voltage having a second temperature characteristic different from the first temperature characteristic to generate a third voltage having a third temperature characteristic different from both the first temperature characteristic and the second temperature characteristic. The second amplifier amplifies a difference between a sum of the second voltage and the third voltage, and, a feedback voltage, to generate a fourth voltage which corrects an oscillation frequency of an oscillation voltage. The oscillation circuitry outputs the oscillation voltage controlled in frequency based on the fourth voltage.

Abstract: The temperature sensor circuit includes a diode that is connected to a first potential at a cathode thereof. The temperature sensor circuit includes a voltage dividing circuit that is connected to an anode of the diode at a second end thereof and outputs a divided voltage. The temperature sensor circuit includes a second amplifying circuit that receives the first signal at a first input end thereof, receives the divided voltage at a second input end thereof, is connected to a first end of the voltage dividing circuit at an output end thereof and outputs a second signal so as to make the divided voltage equal to the first signal. The temperature sensor circuit includes a measuring circuit that calculates a voltage difference between the first signal and the second signal and outputs an output signal based on the result of the calculation.

Abstract: The temperature sensor circuit includes a diode that is connected to a first potential at a cathode thereof. The temperature sensor circuit includes a voltage dividing circuit that is connected to an anode of the diode at a second end thereof and outputs a divided voltage. The temperature sensor circuit includes a second amplifying circuit that receives the first signal at a first input end thereof, receives the divided voltage at a second input end thereof, is connected to a first end of the voltage dividing circuit at an output end thereof and outputs a second signal so as to make the divided voltage equal to the first signal. The temperature sensor circuit includes a measuring circuit that calculates a voltage difference between the first signal and the second signal and outputs an output signal based on the result of the calculation.

Abstract: The temperature sensor circuit includes a diode that is connected to a first potential at a cathode thereof. The temperature sensor circuit includes a voltage dividing circuit that is connected to an anode of the diode at a second end thereof and outputs a divided voltage. The temperature sensor circuit includes a second amplifying circuit that receives the first signal at a first input end thereof, receives the divided voltage at a second input end thereof, is connected to a first end of the voltage dividing circuit at an output end thereof and outputs a second signal so as to make the divided voltage equal to the first signal. The temperature sensor circuit includes a measuring circuit that calculates a voltage difference between the first signal and the second signal and outputs an output signal based on the result of the calculation.

Abstract: The temperature sensor circuit includes a diode that is connected to a first potential at a cathode thereof. The temperature sensor circuit includes a voltage dividing circuit that is connected to an anode of the diode at a second end thereof and outputs a divided voltage. The temperature sensor circuit includes a second amplifying circuit that receives the first signal at a first input end thereof, receives the divided voltage at a second input end thereof, is connected to a first end of the voltage dividing circuit at an output end thereof and outputs a second signal so as to make the divided voltage equal to the first signal. The temperature sensor circuit includes a measuring circuit that calculates a voltage difference between the first signal and the second signal and outputs an output signal based on the result of the calculation.

Abstract: A constant voltage circuit obtains an accurate constant voltage output by reducing the influence of channel length modulation effect of a MOS transistor. A current mirror circuit having two P-channel MOS transistors and two N-channel MOS transistors is added in addition to a main circuit having three P-channel MOS transistors, two N-channel MOS transistors and two resistors. The part of the voltage of the main circuit is input to the current mirror circuit, the output of the current mirror circuit is fed back to the main circuit, and a constant voltage is obtained as the output of the main circuit.

Abstract: An oscillator circuit incorporated in a semiconductor integrated circuit and comprising an oscillation input terminal, an oscillator output terminal, an inverting logic circuit, and a transmission gate. The terminals and are connected to an external oscillator. The inverting logic circuit comprises an N-type MOS transistor and a P-type MOS transistor. The input and output terminals of the logic circuit are connected to the oscilllation input and output terminals, respectively. The transmission gate comprises an N-type MOS transistor and a P-type MOS transistor. Either MOS transistors has a source electrode and a drain electrode, one of which is connected to said oscillation input terminal, and the other of which is said oscillation output terminal. The gate-insulating film at least one of said MOS transistors incorporatedin the transmission gate is thicker than those of other MOS transistors formed on the semiconductor substrate.