Abstract: An atomic oscillator includes: an atom cell in which alkali metal atoms are accommodated; a light-emitting element that emits light beams for exciting the alkali metal atoms toward the atom cell; a shield that includes a first member, a second member, and a high thermal resistance portion and accommodates the atom cell, the first member and the second member being members having a magnetic shielding property, and the high thermal resistance portion being provided between the first member and the second member and having a thermal resistance higher than thermal resistances of the first member and the second member; a temperature control element that controls a temperature of the first member; a heater that is thermally coupled to the second member; and a light-receiving element that receives light beams passing through the atom cell.

Abstract: An integrated circuit device includes first and second temperature sensors, an A/D conversion circuit that performs A/D conversion on first and second temperature detection voltages from the first and second temperature sensors and outputs first and second temperature detection data, a connection terminal that is electrically connected to a temperature detection target device of the first and second temperature sensors, and a digital signal processing circuit that performs digital calculation based on the first and second temperature detection data and performs a temperature compensation process of correcting temperature characteristics of the temperature detection target device.

Abstract: An integrated circuit device includes a digital signal processing circuit that generates frequency control data by performing a temperature compensation process by a neural network calculation process based on temperature detection data and an amount of change in time of the temperature detection data, and an oscillation signal generation circuit that generates an oscillation signal of a frequency set by the frequency control data using a resonator.

Abstract: A resonator including a lower electrode, an upper electrode, and a piezoelectric film that is formed between the lower electrode and the upper electrode. A MEMS device is provided that includes an upper lid that faces the upper electrode, and a lower lid that faces the lower electrode and that seals the resonator together with the upper lid. A CMOS device is mounted on a surface of the upper lid or the lower lid opposite a surface that faces the resonator. The CMOS device includes a CMOS layer and a protective layer that is disposed on a surface of the CMOS layer opposite a surface that faces the resonator. The upper or lower lid to which the CMOS device is joined includes a through-electrode that electrically connects the CMOS device to the resonator.

Abstract: A waveform synthesizer comprises a controllable oscillator for generating an oscillator waveform having an oscillator cycle; a reference input for accepting a reference signal having a reference cycle; and a waveform detector coupled to said oscillator and said reference input. The waveform detector is arranged to sample said waveform in response to said reference input and to determine waveform information about said oscillator. The waveform information is operative to adjust said controllable oscillator.

Abstract: An oscillator comprising an RC oscillator and a bandgap reference source, wherein the bandgap reference source provides a reference current for the RC oscillator, and a temperature coefficient of the reference current is adjustable. Since the oscillation frequency of the RC oscillator has less dependency on a power supply, a clock source having a relatively precise frequency thus can be obtained; and based on the RC oscillator, the bandgap reference source having a temperature compensation function is added, the reference current generated by the bandgap reference source with an adjustable temperature coefficient is used for temperature coefficient compensation to the inherent temperature coefficient of the oscillation frequency of the RC oscillator, thereby reducing the effect of the temperature on the oscillator, so that the output frequency of the oscillator does not change with the temperature as far as possible, which improves the oscillation frequency precision of the oscillator.

Abstract: Systems and methods may be used to determine whether waveforms of at least two transmission lines are synchronous. More particularly, this disclosure relates to sensing operations that use signals received by a local relay and a remote relay to determine whether two waveforms on opposing ends (e.g., supply side and load side, local side and remote side) of a transmission line are synchronous with one another. A system may determine whether a first waveform is synchronous with a second waveform based at least in part on a comparison of delay between a representation of the first waveform and a representation of the second waveform. The system may actuate a device (e.g., close a circuit breaker) in response to determining the first waveform is synchronous with the second waveform.

Abstract: Wireless charging systems and methods are disclosed herein. An example method includes: sending, by a receiver, a communication signal to a transmitter, the receiver being embedded in a radio frequency (RF) transparent housing that is adapted to electrically connect the game controller with the receiver, wherein: the receiver is separated from the transmitter by a non-zero distance, the RF transparent housing supports the game controller, and the communication signal includes information that allows the transmitter to determine the receiver's location. After the sending, the method includes: (A) receiving, by the receiver, RF signals from the transmitter, wherein: the transmitter determines parameters of the RF signals based on the communication signal, and at least one RF signal from the RF signals constructively interferences with at least one other RF signal from the RF signals at the receiver's location, and (B) converting, by the receiver, the received RF signals into electricity.

Abstract: Provided is a circuit device including: an oscillation circuit oscillating a vibrator, in which the oscillation circuit includes a variable capacitance circuit having a first variable capacitance element and a second variable capacitance element constituted by a first transistor and a second transistor, and a reference voltage supply circuit. The first reference voltage is supplied to a first gate of the first transistor and a capacitance control voltage is supplied to a first impurity region of the first transistor, the second reference voltage is supplied to a second gate of the second transistor and the capacitance control voltage is supplied to a second impurity region of the second transistor, and the capacitance control voltage is supplied to a first common impurity region of the first transistor and the second transistor.

Abstract: A system comprises a redundancy circuit board including a plurality of primary input connectors each connectible to a primary power supply that supplies primary electrical energy, a redundancy power input connector connectible to a redundant power supply that supplies redundant electrical energy, a plurality of output connectors connectible to a display component powerable by the primary or redundant electrical energy, and a plurality of electrical pathways including primary pathways each connecting a primary input connector to a corresponding output connector, redundant pathways each connecting the redundancy input connector to a corresponding output connector.

Abstract: A vault apparatus for wireless power transfer includes a vault comprising an opening for a wireless power transfer (“WPT”) pad. The opening is located on a top of the vault. The vault apparatus includes a junction box formed into the vault. The junction box includes an opening oriented toward the top of the vault. The vault apparatus includes a sealing ring that maintains a WPT pad fixed in the vault where a portion of the sealing ring covers the junction box.

Abstract: An apparatus is provided which comprises: a first ring oscillator comprising at least one aging tolerant circuitry; a second ring oscillator comprising a non-aging tolerant circuitry; a first counter coupled to the first ring oscillator, wherein the first counter is to count a frequency of the first ring oscillator; a second counter coupled to the second ring oscillator, wherein the second counter is to count a frequency of the second ring oscillator; and logic to compare the frequencies of the first and second ring oscillators, and to generate one or more controls to mitigate aging of one or more devices.

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: A radio frequency identification (RFID) system may include a plurality of RFID readers and RFID tags. A RFID reader may include an antenna configured to operate at a first frequency and transmit a first beam of a first beam width to the plurality of RFID tags. The RFID antenna may further include an antenna array including a plurality of antennas configured to operate at a second frequency. The antenna array may be configured to transmit a second beam of a second beam width to the plurality of RFID tags. The RFID reader may receive backscatter signals and tag data from the plurality of RFID tags. The RFID reader may locate the plurality of RFID tags based on the backscatter signals and a direction of the second beam. The RFID reader may generate a 3D map of the tag data based on the locations of the plurality of RFID tags.

Abstract: A system for split-frequency amplification, preferably including: one or more primary-band amplification stages, one or more secondary-band amplification stages, one or more band-splitting filters, and/or one or more signal couplers. An analog canceller including one or more split-frequency amplifiers. A mixer including one or more split-frequency amplifiers. A voltage-controlled oscillator including one or more split-frequency amplifiers. A method for split-frequency amplification, preferably including: receiving an input signal, separating the input signal into signal portions, and/or amplifying the signal portions, and optionally including combining the amplified signal portions and/or providing one or more output signals.

Abstract: This document presents an oscillator circuit and method. The oscillator circuit has a crystal to generate an oscillating voltage signal, a load capacitor coupled to the crystal, a capacitive element, and a switching circuit. The switching circuit alternately connects the capacitive element to the load capacitor and disconnects the capacitive element from the load capacitor. The presented oscillator circuit shows the advantages of a lower power consumption and a smaller circuit area.

Abstract: Provided is a circuit device including: a first terminal electrically coupled to one end of a vibrator; a second terminal electrically coupled to the other end of the vibrator; a first coupling wiring electrically coupled to the first terminal; a second coupling wiring electrically coupled to the second terminal; an oscillation circuit having a drive circuit for driving the vibrator via the first coupling wiring and the second coupling wiring, and oscillating the vibrator; and a first capacitor having a metal-insulator-metal (MIM) structure of which one electrode is electrically coupled to the first coupling wiring. The first coupling wiring and the first capacitor having the MIM structure overlap each other in plan view in a direction orthogonal to a substrate on which a circuit element is formed.

Abstract: Methods, systems, and apparatus, for powering AC and DC loads in the event of a power failure. In one aspect, a system includes one or more DC loads that are powered by DC power, one or more AC loads that are powered by AC power, and an uninterruptible power supply (UPS). The UPS includes AC terminals connected to an AC power source and to the one or more AC loads to power the AC loads, DC terminals connected to a backup battery and to the one or more DC loads to power the DC loads a bidirectional AC/DC converter connected between the AC terminals and the DC terminals, and a controller that selectively switches the bidirectional AC/DC converter to the first mode when the AC power source is available and to the second mode when the AC power source is not available.

Abstract: Techniques are described for fast wakeup of a crystal oscillator circuit. Embodiments operate in context of a crystal oscillator coupled with a phase-locked loop (PLL). For example, prior to entering sleep mode, embodiments retain a previously obtained coarse code used to coarse-tune a voltage controlled oscillator of the PLL. On wakeup, the PLL is configured in a chirp mode, in which the retained coarse code and a sweep voltage are used to generate a chirp signal at, or close to, a target stimulating frequency for the crystal oscillator. The chirp signal can be used to inject energy into the crystal oscillator, thereby causing the crystal oscillator to move from sleep mode to steady state oscillation relatively quickly.

Abstract: A smart method is provided for a low-current oscillatory circuitry. The circuitry comprises an oscillator and a microcontroller unit (MCU). The oscillator comprises a proportional-to-absolute-temperature circuit connecting to a low-voltage regulator. The low-voltage regulator connects to a PMOS diode array and a delay unit circuit. The PMOS diode array connects to the MCU. The delay unit circuit connects to the MCU and a voltage converter. The method includes a normal temperature compensation algorithm; a smart learning algorithm of extra-high temperature compensation; and an ultra-high temperature compensation algorithm. Thus, clock variations are compensated; output frequency is stable and not affected by voltage or temperature variations; and process variations are suppressed. When process variations appear, there are not be too many errors generated.