A circuit device includes an oscillation circuit generating an oscillation signal by oscillating a vibrator, a temperature sensor circuit performing an intermittent operation, a logic circuit performing temperature compensation processing based on an output of the temperature sensor circuit, and a power supply circuit supplying power to the oscillation circuit. Further, the logic circuit or the power supply circuit is disposed between the oscillation circuit and the temperature sensor circuit.

A differential crystal oscillator includes a source follower configured to receive an oscillatory signal and output a regenerated signal; a resonant network having a crystal and configured to terminate the oscillatory signal and determine an oscillation frequency of the oscillatory signal; a regenerative network configured to regenerate the regenerated signal; and a capacitive feedback network configured to provide a feedback from the regenerated signal to the oscillatory signal.

A temperature-controlled and temperature-compensated oscillating device and a method of temperature control and temperature compensation is disclosed. The operating temperature of a frequency source is adjusted by driving a heater to a target temperature when the ambient temperature is in a first range between a first temperature and a second temperature higher than the third temperature. The frequency variation of the frequency source resulted from a variation of the ambient temperature is reduced by applying a voltage to the frequency source when the ambient temperature is in a second range between a third temperature and a fourth temperature higher than the third temperature. The third temperature is higher than the first temperature.

A circuit device includes an oscillation circuit that generates an oscillation signal by using a vibrator, a frequency adjustment circuit that adjusts an oscillation frequency of the oscillation circuit based on frequency adjustment data, a temperature sensor circuit that outputs temperature data, an arithmetic operation circuit, and a storage circuit. The arithmetic operation circuit outputs converted temperature data by performing, on the temperature data, conversion processing in which a slope of the converted temperature data with respect to the temperature data in a first temperature range is different from a slope of the converted temperature data with respect to the temperature data in a second temperature range. The storage circuit stores a lookup table representing a correspondence between the converted temperature data and the frequency adjustment data.

Disclosed are a crystal oscillator, a chip, and an electronic device. The crystal oscillator includes: an oscillating circuit, including: a crystal, an amplification circuit, a first load capacitor, and a second load capacitor, where the first load capacitor and the second load capacitor are respectively connected to a first terminal and a second terminal of the crystal; and a first Miller multiplication circuit, where an input terminal and an output terminal of the first Miller multiplication circuit are respectively connected to two terminals of the first load capacitor, and the first Miller multiplication circuit is configured to increase a first load capacitance of the oscillating circuit, where the first load capacitance is a capacitance between the first terminal of the crystal and the ground. According to this technical solution, an area occupied by the load capacitor as well as circuit costs can be reduced.

A method and apparatus for enhancing the stability of an oscillator circuit by generating a comb of frequencies in a non-linear resonator member in response to a drive frequency, the oscillator circuit including a voltage controlled oscillator which is locked to a particular tooth of the comb of frequencies produced by the non-linear resonator member at a drive frequency for which the absolute value of the first derivative of the drive frequency versus said comb frequency is greater than 1, and wherein the second voltage controlled oscillator is coupled with a phase locked loop circuit which controls the locking of the second voltage controlled oscillator to said particular tooth of the comb of frequencies.

An oscillator circuit comprises a crystal oscillator and an inverter. The input of the inverter is connected to the first terminal of the crystal oscillator and the output of the inverter is connected to the second terminal of the crystal oscillator, oscillator circuit is arranged to operate the inverter in its linear operating region. An amplitude regulator has an input connected to the input of the inverter, arranged to provide a first supply current I.sub.AREG to the inverter, where the magnitude of the first supply current is inversely dependent on a magnitude of a voltage at the inverter input. A digital-to-analogue converter is arranged to provide a second supply current I.sub.DAC to the inverter having a magnitude determined by a digital signal applied to a digital input of the digital-to-analogue converter.

An apparatus injects a start clock to a crystal at the beginning to increase an overall start up speed of the crystal. The apparatus relies on an impedance change inside the crystal itself instead of searching for a synchronization on the yet small crystal oscillation. The apparatus includes an oscillator (separate from the crystal) to search for the crystal's resonance frequency by detecting the crystal's impedance change. Once the frequency of the oscillator matches the crystal's resonance, there is significant change in the crystal's impedance. Using that information, the apparatus can lock the oscillator frequency at the crystal resonance frequency and inject the clock with high efficiency.

The smart window for the smart home and smart grid can harvest energy and supply power to the home, grid and window itself. The smart window for the smart home and smart grid has all the Electrochromic panel, Solar panel and Multimedia panel been the same full window wide view and aligned with each other in IGU. To be a home automation system, the smart window has local/remote access/control capabilities. There are several types of smart windows working as master device or slave device. The operation of smart window automation system has three modes, normal/open mode, shut/tint mode and smart phone mode. The tube of air circulation system is hidden inside the frame surrounding IGU. Most of the electronic components are integrated to be FPSOC Field Programmable System On Chip that all the electronic component is hidden in the frame surrounding IGU, too. Therefore, the smart window doesn't have any blockage of window view with the Solar panel, Electrochromic panel, Multimedia panel and air circulation system. The smart window has the clean outlook as the conventional dual panel IGU does. The master device of the smart window system is similar to the huge screen working as a smart phone. In normal/open mode, the smart window is similar to the conventional dual panel window having the full-panel clean and clear view. For the different architectures of the smart homes, the smart window must have versatile alignments and system control that the smart window has to be implemented with the Field Programmable System On Chips of Anlinx, Milinx and Zilinx made of the W5RS advanced FPSOC chip technologies.

Methods, systems, and circuitries are provided to generate clock signals of different qualities in a device. A method includes determining whether the device is operating in a mid power mode or a high power mode. In response to determining that the device is operating in the mid power mode, oscillator circuitry is controlled to cause the oscillator circuitry to consume a lower amount of power, such that the oscillator circuitry generates a lower quality clock signal. In response to determining that the device is operating in the high power mode, the oscillator circuitry is controlled to cause the oscillator circuitry to consume a higher amount of power, such that the oscillator circuitry generates a higher quality clock signal. The lower amount of power and the higher amount of power are different from one another.