Abstract: A cosmetic case includes a protective sheet serving as a separator between a body and a mirror, which reduces possibility of the user's finger or hand being smudged with a cosmetic in the case, and allows the user to easily move the protective sheet. The cosmetic case includes: a body including a container for containing a cosmetic; a lid coupled to the body such that the body is openable and closable with the lid; a mirror attached to the inner surface of the lid; and a protective sheet including a portion serving as a separator between the body and the mirror, wherein the protective sheet includes a fixed section at least partially fixed between the lid and the mirror, and a separator section foldably connected to the fixed section such that the separator section is positioned between the body and the mirror when the body is closed with the lid.

Abstract: A phase locked loop circuit including: a loop filter having a high cutoff characteristic and a low cutoff characteristic that are switchable, and a switching circuit configured to: detect a timing when an irregular gap of no signal, included in a input signal, does not occur, and switch, in the detected timing, a cut off characteristic of the loop filter from the high cutoff characteristic during entrainment of phase locking of a output signal with the input signal to the low cut off characteristic after the phase locking.

Abstract: A data processing device includes: a FIFO buffer; a write circuit writing data in the buffer according to a write clock signal; a read circuit reading data from the buffer according to a read clock signal, a PLL circuit conducting a phase synchronization processing of the read clock signal based on a phase difference between the write and read clock signals and outputting a notification signal when the phase difference becomes within a predetermined range; a write control circuit controlling a timing when the write circuit starts writing based on the notification signal; a read control circuit comparing an address in which data is written and a reference address and controlling a timing when the read circuit starts reading based on a comparison result; and a correction circuit correcting the reference address with a value corresponding to the phase difference obtained when the notification signal has been output.

Abstract: A phase locked loop circuit including: a loop filter having a high cutoff characteristic and a low cutoff characteristic that are switchable, and a switching circuit configured to: detect a timing when an irregular gap of no signal, included in a input signal, does not occur, and switch, in the detected timing, a cut off characteristic of the loop filter from the high cutoff characteristic during entrainment of phase locking of a output signal with the input signal to the low cut off characteristic after the phase locking.

Abstract: A digitally controlled oscillator that generates an output frequency according to input data includes a determination unit that determines whether the input data has a value that causes deterioration in a phase noise characteristic of the digitally controlled oscillator, an offset unit that offsets the input data when the input data is determined to have the value that causes deterioration in the phase noise characteristic, and a generating unit that generates the output frequency using the input data after being offset.

Abstract: A method used by a phase difference detection circuit for detecting a phase difference between two signals includes shifting a detected phase difference between the two signals by an offset value, outputting the detected phase difference, and controlling the offset value such that the outputted detected phase difference falls within a phase difference range between a lower limit and an upper limit.

Abstract: A digitally controlled oscillator that generates an output frequency according to input data includes a determination unit that determines whether the input data has a value that causes deterioration in a phase noise characteristic of the digitally controlled oscillator, an offset unit that offsets the input data when the input data is determined to have the value that causes deterioration in the phase noise characteristic, and a generating unit that generates the output frequency using the input data after being offset.

Abstract: There is provided a phase locked loop circuit which includes a frequency divider, a phase comparator, a filter, and an output signal oscillator. The frequency divides a feedback signal by a specific ratio and the feedback signal is used for synchronizing a phase of a reference signal and a phase of an output signal. The phase comparator compares the phases of the reference signal, the output signal, and the feedback signal and adjusts a gain of an analog signal used for generating the output signal in accordance with increase or decrease of the ratio. The filter filters the analog signal to pass signals in a specific frequency band, the gain of the analog signal having been adjusted by the phase comparator and the output signal oscillator outputs the output signal on the basis of the analog signal.

Abstract: A method used by a phase difference detection circuit for detecting a phase difference between two signals includes shifting a detected phase difference between the two signals by an offset value, outputting the detected phase difference, and controlling the offset value such that the outputted detected phase difference falls within a phase difference range between a lower limit and an upper limit.

Abstract: There is provided a phase locked loop circuit which includes a frequency divider, a phase comparator, a filter, and an output signal oscillator. The frequency divides a feedback signal by a specific ratio and the feedback signal is used for synchronizing a phase of a reference signal and a phase of an output signal. The phase comparator compares the phases of the reference signal, the output signal, and the feedback signal and adjusts a gain of an analog signal used for generating the output signal in accordance with increase or decrease of the ratio. The filter filters the analog signal to pass signals in a specific frequency band, the gain of the analog signal having been adjusted by the phase comparator and the output signal oscillator outputs the output signal on the basis of the analog signal.

Abstract: A phase comparator includes an edge detecting unit to which a reference signal is input and to which a referred signal based on the reference signal is input as a feedback signal. The edge detecting unit detects an edge of the reference signal and an edge of the referred signal. The phase comparator also includes a phase-difference detecting unit that detects a phase difference between the edge of the reference signal and the edge of the referred signal. The phase comparator also includes a phase-difference-signal output unit that outputs a phase-difference signal for current control based on the phase difference. The phase comparator also includes an input-break detecting unit that detects an input break of the reference signal when an edge of the referred signal is again detected after an edge of the referred signal is detected and before an edge of the reference signal is detected.

Abstract: A control apparatus that performs control to synchronize an output clock signal with an input clock signal includes a counting part that counts a phase difference between the input clock signal and the output clock signal, an extracting part that extracts a count value indicating, of phase differences counted by the counting part, a phase difference within a certain range, and a clock generating part that generates the output clock signal, the clock generating part being capable of controlling a frequency of the output clock signal on the basis of the extracted count value indicating the phase difference within the certain range.

Abstract: A phase comparator includes an edge detecting unit to which a reference signal is input and to which a referred signal based on the reference signal is input as a feedback signal. The edge detecting unit detects an edge of the reference signal and an edge of the referred signal. The phase comparator also includes a phase-difference detecting unit that detects a phase difference between the edge of the reference signal and the edge of the referred signal. The phase comparator also includes a phase-difference-signal output unit that outputs a phase-difference signal for current control based on the phase difference. The phase comparator also includes an input-break detecting unit that detects an input break of the reference signal when an edge of the referred signal is again detected after an edge of the referred signal is detected and before an edge of the reference signal is detected.

Abstract: The present invention relates to a static magnetic field applying structure for use in an atomic oscillator in which plural sets of magnetic field generating means are provided with spacing interposed among them, and a resonance cell is disposed in a space between the magnetic field generating means. The object of the present invention is to realize the static magnetic field applying structure which can be small-sized and produced at a low cost.

Abstract: A compact atomic oscillator with improved frequency stability. A voltage-controlled oscillator generates an oscillation signal based on a given control voltage, and a modulator modulates it with a low-frequency signal. A phase-locked loop (PLL) upconverts the modulated oscillation signal directly to a first frequency in atomic resonance frequency band. The first frequency is an integer multiple of the oscillation signal. A frequency synthesizer produces a second frequency specified by a frequency setting unit, and a mixer combines the first and second frequencies to produce an RF signal for driving an atomic resonator. The amount of discharge lamp light passing through the atomic resonator depends on the difference between RF signal frequency and atomic resonance frequency. This quantity is measured as a resonance detection signal, and a frequency controller applies it to synchronous detection to produce a control voltage for the voltage-control oscillator.

Abstract: The present invention relates to a static magnetic field applying structure for use in an atomic oscillator in which plural sets of magnetic field generating means are provided with spacing interposed among them, and a resonance cell is disposed in a space between the magnetic field generating means. The object of the present invention is to realize the static magnetic field applying structure which can be small-sized and produced at a low cost.

Abstract: A compact atomic oscillator with improved frequency stability. A voltage-controlled oscillator generates an oscillation signal based on a given control voltage, and a modulator modulates it with a low-frequency signal. A phase-locked loop (PLL) upconverts the modulated oscillation signal directly to a first frequency in atomic resonance frequency band. The first frequency is an integer multiple of the oscillation signal. A frequency synthesizer produces a second frequency specified by a frequency setting unit, and a mixer combines the first and second frequencies to produce an RF signal for driving an atomic resonator. The amount of discharge lamp light passing through the atomic resonator depends on the difference between RF signal frequency and atomic resonance frequency. This quantity is measured as a resonance detection signal, and a frequency controller applies it to synchronous detection to produce a control voltage for the voltage-control oscillator.

Abstract: In an atomic oscillator of an optical pumping system, a slot line resonator, as a microwave resonator, is arranged in a portion where atoms are excited. The slot line resonator forms a microstrip line inputting microwaves so as to be orthogonal to a slot line with a dielectric substrate being sandwiched therebetween. A container in which the atoms are enclosed is mounted on the slot line resonator, and the slot line resonator and the container are covered with a metallic case having a pumping light passage hole and a photo element.

Abstract: An oscillator controller which optimizes key circuit parameters of an excitation circuit according to the operating condition of a discharge lamp. An excitation circuit energizes a discharge lamp to produce a light beam for pumping atoms, as part of a mechanism of atomic resonance detection. The operation of the excitation circuit is monitored by a start-up voltage monitor, which asserts a voltage monitoring signal when the excitation circuit's start-up voltage is reached. A light amount monitor receives a resonance detection signal from a light sensing device to check the amount of light before and after the discharge lamp lights up. The resultant light amount monitoring signal indicates this information. Based on the two monitoring signals, a bias voltage selector selects an appropriate bias voltage that varies circuit parameters of the excitation circuit.

Abstract: An oscillator controller which optimizes key circuit parameters of an excitation circuit according to the operating condition of a discharge lamp. An excitation circuit energizes a discharge lamp to produce a light beam for pumping atoms, as part of a mechanism of atomic resonance detection. The operation of the excitation circuit is monitored by a start-up voltage monitor, which asserts a voltage monitoring signal when the excitation circuit's start-up voltage is reached. A light amount monitor receives a resonance detection signal from a light sensing device to check the amount of light before and after the discharge lamp lights up. The resultant light amount monitoring signal indicates this information. Based on the two monitoring signals, a bias voltage selector selects an appropriate bias voltage that varies circuit parameters of the excitation circuit.