An oscillation device includes an oscillator and a logic circuit. The oscillator generates an output oscillation signal. The logic circuit controls the oscillator according to the output oscillation signal, such that the output oscillation signal includes two different oscillation periods. The oscillation device may be used as a temperature-to-frequency converter without any bandgap reference circuit.

The present invention provides a continuous time circuit including an amplifier and a RC calibration circuit. In the operations of the continuous time circuit, the amplifier is configured to amplify an input signal to generate an output signal, and the RC calibration circuit is configured to adjust a capacitance of a compensation capacitor of the amplifier according to a RC product measurement result.

The present invention provides a continuous time circuit including an amplifier and a RC calibration circuit. In the operations of the continuous time circuit, the amplifier is configured to amplify an input signal to generate an output signal, and the RC calibration circuit is configured to adjust a capacitance of a compensation capacitor of the amplifier according to a RC product measurement result.

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.

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.

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.

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.

An oscillator includes a tunable oscillator, a phase detector circuit communicatively coupled with an output of the tunable oscillator and an input to the oscillator, and an oscillator controller circuit configured to adjust frequency of the tunable oscillator based upon phase detection between output of the tunable oscillator and output of an external resonant element received at the input to the oscillator.

An oscillator includes a tunable oscillator, a phase detector circuit communicatively coupled with an output of the tunable oscillator and an input to the oscillator, and an oscillator controller circuit configured to adjust frequency of the tunable oscillator based upon phase detection between output of the tunable oscillator and output of an external resonant element received at the input to the oscillator.

A transmission system comprising: an output-terminal configured to provide an output-signal; a phase-shift oscillator comprising a plurality of phase-shifters, each configured to provide one of a plurality of phase-shifted-signals; and a controller configured to provide a selected one of the phase-shifted-signals to the output-signal as a transition in the output-signal, at an instant in time that is based on one or more of the plurality of phase-shifted-signals.