Seiko Epson Corporation

Naoki Ii

Yosuke Itasaka

Takashi Nomiya

Masayuki Ishikawa

An integrated circuit apparatus includes a pad via which an AC signal is inputted or outputted, a circuit that overlaps with the pad in the plan view, protective wiring provided between the pad and the circuit, and a resistor having one end electrically coupled to the protective wiring and another end electrically coupled to an electric charge discharging path.

Integrated circuit apparatus and oscillator including a protective wiring provided between a pad and a circuit

A circuit apparatus includes a clock signal generation circuit configured to generate a clock signal by a resonator, an output circuit configured to operate in a first state or a second state in which a consumption current is different from that in the first state and output an output clock signal, and a temperature compensation circuit configured to compensate for a frequency-temperature characteristic of the clock signal based on a temperature detection signal. When the output circuit operates in the first state, the temperature compensation circuit outputs a first temperature compensation signal that compensates for a frequency-temperature characteristic when the output circuit operates in the first state, and the clock signal generation circuit generates a clock signal based on the first temperature compensation signal. When the output circuit operates in the second state, the temperature compensation circuit outputs a second temperature compensation signal that compensates for a frequency-temperature characteristic when the output circuit operates in the second state, and the clock signal generation circuit generates a clock signal based on the second temperature compensation signal.

Circuit apparatus and oscillator

The circuit device includes a current generation circuit configured to generate a temperature compensation current based on a temperature detection voltage, and a current-voltage conversion circuit configured to perform current-voltage conversion on the temperature compensation current to output a temperature compensation voltage. The current-voltage conversion circuit includes an operational amplifier, and a feedback circuit. The operational amplifier includes a differential section having a current mirror circuit and differential pair transistors, an output section configured to output the temperature compensation voltage, and an RC low-pass filter configured to output a signal obtained by performing a low-pass filter process on an output signal of the differential section to an input node of the output section.

Circuit device, oscillator, electronic apparatus, and vehicle

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.

Oscillator, electronic device, and vehicle

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.

A unit operable in a plurality of operating modes includes a first circuit, a regulator and current controller. The first circuit is adapted to operate in a first operating mode, and not to operate in a second operating mode preceding the first operating mode. The a regulator is adapted to supply driving voltage to the first circuit, and switchable among a plurality of levels of internal current. The current controller adapted to control the internal current of the regulator in the first operating mode to a first level among the plurality of levels of internal current. The current controller adapted control the internal current of the regulator in the second operating mode to a second level among the plurality of levels of internal current. The second level is lower than the first level.

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Suwa, Japan

Naoki Ii