Oscillator, electronic apparatus, and vehicle
View Patent ↗In the oscillator, a quartz crystal resonator and an oscillation circuit formed in an IC incorporating an inductor are electrically coupled to each other with a resonator interconnection disposed on a surface of a substrate to form an oscillation loop. A conductor layer disposed as an intermediate layer of the substrate is disposed so as to overlap the resonator interconnection and not to overlap the inductor incorporated in the IC in a plan view.
1. An oscillator comprising:
an integrated circuit element having an oscillation circuit to electrically be coupled to a resonator element, and an inductor; and
a substrate having a first surface on which the integrated circuit element is disposed, and on which a resonator interconnection to be coupled to the resonator element and the oscillation circuit to constitute an oscillation loop is disposed, and a second surface as an opposite surface to the first surface, wherein
the substrate has a conductor layer between the first surface and the second surface,
the conductor layer overlaps the resonator interconnection, and does not overlap the inductor in a plan view, and
the conductor layer overlaps the oscillation circuit in the plan view.
2. The oscillator according to claim 1 , wherein
the integrated circuit element is bonded to the first surface via an electrically-conductive bonding member with an active surface opposed to the first surface.
3. The oscillator according to claim 1 , wherein
the integrated circuit element includes a PLL circuit,
the PLL circuit includes
a phase comparison circuit configured to compare a phase of an oscillation signal from the oscillation circuit and a phase of a feedback signal with each other,
a voltage-controlled oscillation circuit an oscillation frequency of which is controlled based on an output signal from the phase comparison circuit, and
a frequency dividing circuit configured to divide a frequency of an output signal from the voltage-controlled oscillation circuit to generate the feedback signal, and
the voltage-controlled oscillation circuit is an LC oscillation circuit including the inductor.
4. The oscillator according to claim 1 , wherein
the oscillation circuit is disposed between the resonator interconnection and the inductor in the plan view.
5. The oscillator according to claim 1 , further comprising:
a frame body which is bonded to the first surface to form a housing space configured to house the resonator element and the integrated circuit element; and
a lid body which is made of metal, which is bonded to the frame body, and which is configured to cover the housing space, wherein
the lid body is grounded, and
a distance between the lid body and the first surface is longer than a distance between the conductor layer and the first surface.
6. An electronic apparatus comprising:
the oscillator according to claim 1 .
7. A vehicle comprising:
the oscillator according to claim 1 .
8. An oscillator comprising:
an integrated circuit element having an oscillation circuit to electrically be coupled to a resonator element, and an inductor, and
a substrate having a first surface on which the integrated circuit element is disposed and on which a resonator interconnection to be coupled to the resonator element and the oscillation circuit to constitute an oscillation loop is disposed, and a second surface as an opposite surface to the first surface, wherein
the substrate has a conductor layer between the first surface and the second surface,
the conductor layer overlaps the resonator interconnection, and does not overlap the inductor in a plan view, and
the conductor layer is disposed so as to surround at least two sides of a periphery of the inductor in the plan view.
9. An oscillator comprising:
an integrated circuit element having an oscillation circuit to electrically be coupled to a resonator element, and an inductor; and
a substrate having a first surface on which the integrated circuit element is disposed, and on which a resonator interconnection to be coupled to the resonator element and the oscillation circuit to constitute an oscillation loop is disposed, and a second surface as an opposite surface to the first surface, wherein
the substrate has a conductor layer between the first surface and the second surface,
the conductor layer overlaps the resonator interconnection, and does not overlap the inductor in a plan view, and
the conductor layer is grounded.