An integrated circuit device includes: a first oscillation circuit that oscillates a first resonator to generate a first clock signal with a first clock frequency; a second oscillation circuit that oscillates a second oscillation element to generate a second clock signal with a second clock frequency that is different from the first clock frequency; and a time-to-digital conversion circuit that converts a time into a digital value using the first and second clock signals.

A resonator device includes a first resonator that generates a reference clock signal, a second resonator that generates a first clock signal having a frequency adjusted based on the reference clock signal, and a circuit device that includes a temperature sensor for performing temperature compensation on an oscillation frequency of the first resonator. The temperature sensor is disposed on the circuit device such that the first resonator overlaps the temperature sensor in a plan view.

Provided is an oscillation apparatus and an oscillation control apparatus including a first control section that generates a first control signal that controls an oscillation frequency of an oscillator, based on a temperature detection result of a temperature detecting section; an encoder that generates a feedback signal; a second control section that generates a second control signal that controls the oscillation frequency of the oscillator, based on the temperature detection result of the temperature detecting section, an external input signal input from outside, and the feedback signal; an oscillation circuit that sets the oscillation frequency of the oscillator, based on the first control signal and the second control signal; and a reference voltage generating section that generates a reference voltage, wherein the encoder generates the feedback signal by comparing the second control signal and the reference voltage.

A circuit device includes a digital interface, a processor, an oscillation signal generation circuit, a clock signal generation circuit that generates a clock signal having frequency obtained through multiplication of a frequency of the oscillation signal, and terminal groups of the digital interface and the clock signal generation circuit. The terminal group of the digital interface is disposed in a first region along a first side of the circuit device, and the terminal group of the clock signal generation circuit is disposed in any one of second, third and fourth regions of the circuit device.

A resonator device includes first and second resonators and an integrated circuit device. The integrated circuit device includes a first oscillation circuit configured to oscillate the first resonator, a second oscillation circuit configured to oscillate the second resonator, and a processing circuit configured to perform processing by using frequency difference information or frequency comparison information between a first clock signal generated by oscillating the first resonator and a second clock signal generated by oscillating the second resonator. The first resonator is supported on the integrated circuit device by a first support portion. The second resonator is supported on the integrated circuit device by a second support portion.

A resonator device includes first and second resonators and an integrated circuit. The integrated circuit includes first and second oscillation circuits that oscillate first and second resonators, first and second terminals connected to the first oscillation circuit, and third and fourth terminals connected to the second oscillation circuit. The first terminal of the integrated circuit and one electrode of the first resonator are connected to each other via a bump. The third terminal and one electrode of the second resonator are connected to each other via a bump. In a plan view, at least a portion of the first resonator overlaps the first oscillation circuit and at least a portion of the second resonator overlaps the second oscillation circuit.

A semiconductor circuit device includes an oscillation circuit, an output circuit that receives a signal output from an oscillation circuit and outputs an oscillation signal, a temperature sensing element, a characteristic adjustment circuit that adjusts characteristics of the oscillation circuit on the basis of a signal output from the temperature sensing element, and a first connection terminal that is electrically connected to the output circuit and via which the oscillation signal is output, in which a distance between the output circuit and the first connection terminal is shorter than a distance between the temperature sensing element and the first connection terminal in a plan view.

A circuit device includes a first PLL circuit to which a first clock signal having a first clock frequency generated using a first resonator and a reference clock signal are input, and which performs phase synchronization between the first clock signal and the reference clock signal, a second PLL circuit to which a second clock signal generated using a second resonator and having a second clock frequency different from the first clock frequency and the reference clock signal are input, and which performs phase synchronization between the second clock signal and the reference clock signal, and a time-to-digital conversion circuit adapted to convert time into a digital value using the first clock signal and the second clock signal.

A temperature compensated oscillation controller includes a temperature compensation circuit configured to provide a reference voltage through a first terminal and to receive an input voltage including temperature information through a second terminal, and an oscillation circuit configured to be connected to an external crystal resonator through third and fourth terminals and to output a clock signal in response to an oscillation signal from the external crystal resonator. The temperature compensation circuit is configured to perform a voltage controlled oscillator-based sensing operation to convert the input voltage into a temperature code and to adjust a frequency of the clock signal using the temperature code.

An oscillation circuit includes an amplification circuit that causes a resonator to oscillate, and a variable capacitance circuit whose capacitance value is controlled on the basis of a control voltage. The variable capacitance circuit includes a first variable capacitive element in which an inflection point voltage in a change characteristic of a capacitance value for the control voltage is a first voltage, and a second variable capacitive element in which an inflection point voltage in a change characteristic of a capacitance value for the control voltage is a second voltage which is different from the first voltage. A capacitance value of the first variable capacitive element when the control voltage is the first voltage is different from a capacitance value of the second variable capacitive element when the control voltage is the second voltage.