An integrated circuit may include oscillator circuitry having a resonator formed from fin field-effect transistor (FinFET) devices. The resonator may include drive cells of alternating polarities and sense cells interposed between the drive cells. The resonator may be connected in a feedback loop within the oscillator circuitry. The oscillator circuitry may include an amplifier having an input coupled to the sense cells and an output coupled to the drive cells. The oscillator circuitry may also include a separate inductor and capacitor based oscillator, where the resonator serves as a separate output filter stage for the inductor and capacitor based oscillator.

A vibrator device includes a first excitation electrode, a first pad electrode, and a first drawn wiring line that are disposed at a first surface of a vibrator element, a second excitation electrode, a second pad electrode, and a second drawn wiring line that are disposed at a second surface of the vibrator element, and a spiral first electrode pattern disposed at the first surface of the vibrator element. The first excitation electrode and the second excitation electrode are disposed so as to face each other with the vibrator element therebetween. A first central end section of the first electrode pattern is electrically coupled to the second drawn wiring line via a through electrode provided in the vibrator element. A first outer circumferential end section of the first electrode pattern is electrically coupled to the first drawn wiring line. The first drawn wiring line is electrically coupled to at least one of the first excitation electrode and the first pad electrode. The second drawn wiring line is electrically coupled to at least one of the second excitation electrode and the second pad electrode.

Both parallel-type and serial-type dual-mode oscillators employing stress compensated cut resonators having various configurations are disclosed. Both classes of dual-mode oscillators employ multiple tank circuits to pass one frequency of the resonator and block the other frequency. The tank circuits isolate the operation of the two oscillator sub-circuits that form the dual-mode oscillator from one another. The dual-mode oscillators may be implemented with either bipolar or CMOS transistors. The parallel-type dual-mode oscillators employ inverters to provide gain. The serial-type dual-mode oscillators employ a two (or three) stage design including a follower circuit first stage and an inverting amplifier/limiter circuit second stage, with an optional intervening transimpedance amplifier stage.

An oscillation circuit includes a first oscillation circuit configured to oscillate a resonator to generate a first oscillation signal, a second oscillation circuit configured to generate a second oscillation signal, a frequency measurement circuit configured to measure a frequency of the second oscillation signal based on the first oscillation signal in a first period in which the first oscillation circuit is in operation, a holding circuit configured to hold a measurement result by the frequency measurement circuit in a second period in which the first oscillation circuit is not in operation, and an oscillation signal generation circuit configured to generate a third oscillation signal based on the second oscillation signal and the measurement result held in the holding circuit in a third period in which the first oscillation circuit starts up, wherein the third oscillation signal is supplied to the first oscillation circuit in the third period.

An integrated circuit device includes a first pad and a second pad electrically coupled to one end and the other end of a resonator, an oscillation circuit that is electrically coupled to the first pad and the second pad and generates an oscillation signal by causing the resonator to oscillate, and an output circuit that outputs a clock signal based on the oscillation signal. The oscillation circuit is disposed along a first side of the integrated circuit device among the first side, a second side that intersects the first side, a third side that is an opposite side of the first side, and a fourth side that is an opposite side of the second side. The first pad and the second pad are disposed in the oscillation circuit along the first side in a plan view, and the output circuit is disposed along the second side.

An integrated circuit device includes an oscillation circuit that generates an oscillation signal by causing a resonator to oscillate, a temperature compensation circuit that performs temperature compensation of an oscillation frequency of the oscillation circuit, an output circuit that outputs a clock signal based on the oscillation signal, a first regulator that generates a first regulated power supply voltage based on a power supply voltage and supplies the first regulated power supply voltage to the temperature compensation circuit, and a second regulator that generates a second regulated power supply voltage based on the power supply voltage and supplies the second regulated power supply voltage to the output circuit.

In one embodiment, a device in a low-power and lossy network (LLN) makes, based on a temperature measurement, a first adjustment to a frequency for a wireless channel used by the device to communicate with one or more neighboring devices in the LLN. The device receives, via the wireless channel, a packet from one of the neighboring devices that indicates a transmit frequency for the packet. The device calculates a frequency offset based on a difference between the transmit frequency for the packet and the adjusted frequency for the wireless channel. The device makes, based on the calculated frequency offset, a second adjustment to the frequency for the wireless channel used by the device to communicate with the one or more neighboring devices in the LLN.

An oscillator includes a resonator and an integrated circuit, the integrated circuit includes an oscillation circuit that oscillates the resonator, a temperature sensor, a temperature compensation circuit that compensates for temperature characteristics of the resonator based on an output signal of the temperature sensor, an output circuit that receives a signal output from the oscillation circuit and outputs an oscillation signal, and a heat generating circuit, and in the heat generating circuit, a current flows in a first period after supply of a power supply voltage from the outside is started to generate heat and no current flows in the second period after the first period ends.

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; an oscillation circuit electrically coupled to the first terminal and the second terminal, and oscillating the vibrator; a third terminal to which an external input signal is input; a switch circuit provided between a first wiring which couples the first terminal and the oscillation circuit with each other and the third terminal, and having a P-type transistor; and a control circuit outputting a regulated voltage, in which a power supply voltage is regulated, as a substrate voltage of the P-type transistor.

In one embodiment, a device in a low-power and lossy network (LLN) makes, based on a temperature measurement, a first adjustment to a frequency for a wireless channel used by the device to communicate with one or more neighboring devices in the LLN. The device receives, via the wireless channel, a packet from one of the neighboring devices that indicates a transmit frequency for the packet. The device calculates a frequency offset based on a difference between the transmit frequency for the packet and the adjusted frequency for the wireless channel. The device makes, based on the calculated frequency offset, a second adjustment to the frequency for the wireless channel used by the device to communicate with the one or more neighboring devices in the LLN.