Abstract: There is provided an oscillation circuit including: a main oscillation circuit that outputs a specific main clock to an internal circuit; a sub oscillation circuit that outputs a sub clock having a different frequency to the frequency of the main oscillation circuit; a first abnormality detection section that detects an abnormality according to a number of main clock cycles output from the main oscillation circuit within a predetermined period corresponding to sub clock outputs from the sub oscillation circuit; and a second abnormality detection section that detects an abnormality according to a frequency divided clock of the main clock output from the main oscillation circuit that has been frequency-divided and the sub clock output from the sub oscillation circuit.

Abstract: There is provided an oscillation frequency regulating circuit including: a measuring section that performs measurement based on an oscillation frequency of an oscillation circuit; a comparator section that compares a measurement value measured by the measuring section against a set comparison value over a set comparison duration; a setting section that sets a comparison value selected from a plurality of comparison values of different magnitudes and that sets in the comparator section the comparison duration according to the magnitude of the selected comparison value; and a regulation section that, based on the comparison result of the comparator section, regulates the oscillation frequency of the oscillation circuit such that the oscillation frequency that is measured by the measuring section becomes a target oscillation frequency.

Abstract: A gravity axis determination apparatus which can determine the gravity direction in a short time. The apparatus is low in cost and has a simple construction. Data values of acceleration data trains in a same time zone are mutually compared and one of the three axes is determined as a gravity axis.

Abstract: There is provided a voltage comparison circuit including: a voltage adjustment section connected between a first potential supply line and a first node; a first constant current source connected between the first node and a fixed potential supply line; a switch element connected between a second potential supply line and a second node, and including a control terminal connected to the first node, the switch element operating in accordance with a voltage of the first node; and a second constant current source connected between the second node and the fixed potential supply line.

Abstract: The present invention provides a battery residual amount measurement system including: a current detection section that defects a current value of current discharged from a battery that is an object of measurement: a first storage section that stores reference undischargeable amounts that are determined in advance in accordance with ambient temperatures of the battery and current values of current discharged from the battery; and a calculating section that when a discharging operation is carried out at the battery, acquires, from the first storage section, the reference undischargeable amount that corresponds to an ambient temperature of the battery and the current value detected by the current detection section, and calculates a battery residual amount on the basis of a undischargeable amount that is calculated and computed on the basis of the acquired reference undischargeable amount and a nominal battery capacity of the battery.

Abstract: A boosting circuit includes an input terminal to which a power voltage is applied, a first capacitor connected to the input terminal, second and third capacitors, a first circuit including a first switch through which one end of the first capacitor is connected to one end of the second capacitor, and a second switch through which another end of the first capacitor is connected to another end of the second capacitor, a second circuit including a third switch through which the one end of the first capacitor is connected to the other end of the second capacitor, and a fourth switch through which the one end of the second capacitor is connected to one end of the third capacitor, the other end of the first capacitor being connected to another end of the third capacitor, and a fifth switch through which the one end of the first capacitor is connected to the one end of the third capacitor.

Abstract: Provided are a power supply device capable of producing a highly-accurate supply voltage at low power consumption, a method for controlling the power supply device, and an electronic apparatus in which the power supply device is incorporated. The power supply device includes a first power supplying part and a second power supplying part which has less output current capacity than the first power supplying part does. The power supply device is configured to control the voltage value of the second voltage produced in the second power supplying part in order to make the first voltage produced in the first power supplying part equal to the second voltage produced in the second power supplying part.

Abstract: A circuit and a method for removing a frequency offset and a communication apparatus including the circuit, capable of removing the frequency offset by tracking rapidly and accurately in a payload section. A sequence of sample levels is obtained by sampling a frequency level of the baseband signal at every 0.5 symbol interval. Absolute values of differences between the frequency levels adjacent to each other at every 1 symbol are calculated as first difference absolute values. Absolute values of differences between the frequency levels adjacent to each other at every 1 symbol are calculated as second difference absolute values. When the first difference absolute values are greater than a predetermined first determination value or the second difference absolute values are less than a predetermined second determination value, the average value calculated is set as the frequency offset.

Abstract: A voltage output device capable of preventing an increase in circuit scale includes an offset compensation function and is suitably applicable to a drive circuit for display devices. The voltage output device includes an operational amplifier having an inverting input terminal and a non-inverting input terminal. Resistance values of a load resistor on the inverting input side and a load resistor on the non-inverting input side are maintained when the output voltage of the amplifier has changed while sequentially varying either one or both of the resistance values of the load resistor on the inverting input side and the load resistor on the non-inverting input side in a state that the inverting input terminal and the non-inverting input terminal are connected. The voltage output device is configured to output the output voltage of the amplifier with the inverting input terminal not connected to the non-inverting input terminal.

Abstract: A time measurement device includes a first measurement unit configured to measure a clock number of a first reference clock signal within a specific cycle of a second reference clock signal; a calculation unit configured to calculate a physical amount indicating a variance amount of the clock number relative to a reference clock number; a compensation unit configured to compensate an expected measurement value indicating the clock number of the first reference clock signal corresponding to a time as a measurement target according to the physical amount calculated with the calculation unit; and an output unit configured to output time information indicating that the clock number of the first reference clock signal reaches the expected measurement value when the clock number of the first reference clock signal measured with the first measurement unit reaches the expected measurement value compensated with the compensation unit.

Abstract: A temperature detection circuit that can detect temperature with high accuracy regardless of manufacturing variations, and a method of adjusting the same. The circuit includes: first and second diodes having respective independent p-n junctions; a first current path including a first variable voltage dividing resistor series connected to the first diode; a second current path including a second variable voltage dividing resistor series connected to the second diode; a reference voltage generation part that feeds back a differential voltage to each of the first and second current paths and outputs as a reference voltage the differential voltage indicating a difference between a first divided voltage of the first variable voltage dividing resistor and a potential on the second current path; and a temperature detection signal generation part generating a temperature detection signal based on a second divided voltage of the second variable voltage dividing resistor.

Abstract: A RAM memory device includes a selection unit that supplies the access reaching one of two interfaces to a RAM in one cycle of a clock signal in response to a control signal. The RAM memory device also includes a storage unit that stores another access that has reached the other of the two interfaces at least till the next cycle following the above-mentioned one cycle in response to the control signal. The selection unit supplies the above-mentioned another access from the storage unit to the RAM in or after the above-mentioned next cycle.

Abstract: A semiconductor device includes a first terminal for receiving a first signal; a second terminal for receiving a second signal having more restriction than the first signal with respect to a delay upon transmitting to an internal circuit; a first noise reduction circuit; and a second noise reduction circuit. The first noise reduction circuit includes a first Schmitt circuit for receiving the first signal from the first terminal; and an output signal adjusting unit for adjusting an output signal of the first Schmitt circuit when the output signal is maintained for a specific period of time after the output signal is varied. The second noise reduction circuit includes a second Schmitt circuit for receiving the second signal from the second terminal; and an input signal adjusting unit for adjusting the second signal input to the second Schmitt circuit according to a fluctuation of a power source voltage.