Abstract: An electronic device includes a first board, a second board, and support pillars. The support pillars hold the first board and the second board mutually separated. The first board has a first surface on which an electronic component is mounted. The first board has a second surface that includes depressed portions into which the support pillars extending from the second board are inserted.

Abstract: An electronic device includes a first board, a second board, and support pillars. The support pillars hold the first board and the second board mutually separated. The first board has a first surface on which an electronic component is mounted. The first board has a second surface that includes depressed portions into which the support pillars extending from the second board are inserted.

Abstract: Provided is a piezoelectric oscillator to attain high-frequency performance and frequency stabilization with the use of reflection characteristics of a reflective element. A piezoelectric oscillator is configured such that a resonant circuit is connected to a gate of a field effect transistor; an output terminal is connected to a drain and a power supply voltage V is applied to the drain; a piezoelectric resonator is connected to a source, as a reflective element; and a resonance frequency of the resonant circuit and an oscillation frequency of the piezoelectric resonator as a reflective element are set to substantially the same frequency, and further, the piezoelectric oscillator may be configured such that a first matching circuit is provided between the resonant circuit and the gate, second matching circuit is provided between the drain and the output terminal, and a third matching circuit is provided between the source and the reflective element.

Abstract: Provided is a piezoelectric oscillator to attain high-frequency performance and frequency stabilization with the use of reflection characteristics of a reflective element. A piezoelectric oscillator is configured such that a resonant circuit is connected to a gate of a field effect transistor; an output terminal is connected to a drain and a power supply voltage V is applied to the drain; a piezoelectric resonator is connected to a source, as a reflective element; and a resonance frequency of the resonant circuit and an oscillation frequency of the piezoelectric resonator as a reflective element are set to substantially the same frequency, and further, the piezoelectric oscillator may be configured such that a first matching circuit is provided between the resonant circuit and the gate, second matching circuit is provided between the drain and the output terminal, and a third matching circuit is provided between the source and the reflective element.

Abstract: Provided is a piezoelectric oscillator to attain high-frequency performance and frequency stabilization with the use of reflection characteristics of a reflective element. A piezoelectric oscillator is configured such that: a resonant circuit is connected to a gate of a field effect transistor; an output terminal is connected to a drain and a power supply voltage V is applied to the drain; a piezoelectric resonator is connected to a source, as a reflective element; and a resonance frequency of the resonant circuit and an oscillation frequency of the piezoelectric resonator as a reflective element are set to substantially the same frequency, and further, the piezoelectric oscillator may be configured such that a first matching circuit is provided between the resonant circuit and the gate, a second matching circuit is provided between the drain and the output terminal, and a third matching circuit is provided between the source and the reflective element.

Abstract: Provided is a piezoelectric oscillator to attain high-frequency performance and frequency stabilization with the use of reflection characteristics of a reflective element. A piezoelectric oscillator is configured such that: a resonant circuit is connected to a gate of a field effect transistor; an output terminal is connected to a drain and a power supply voltage V is applied to the drain; a piezoelectric resonator is connected to a source, as a reflective element; and a resonance frequency of the resonant circuit and an oscillation frequency of the piezoelectric resonator as a reflective element are set to substantially the same frequency, and further, the piezoelectric oscillator may be configured such that a first matching circuit is provided between the resonant circuit and the gate, a second matching circuit is provided between the drain and the output terminal, and a third matching circuit is provided between the source and the reflective element.