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公开(公告)号：US11616473B2
公开(公告)日：2023-03-28
申请号：US17483871
申请日：2021-09-24
发明人： Teppei Higuchi , Noboru Itomi
摘要： A circuit device includes an oscillation circuit generating an oscillation signal by oscillating a vibrator, a temperature sensor circuit performing an intermittent operation, a logic circuit performing temperature compensation processing based on an output of the temperature sensor circuit, and a power supply circuit supplying power to the oscillation circuit. The oscillation circuit is disposed in a circuit region, the temperature sensor circuit and the logic circuit are disposed in a circuit region, and the power supply circuit is disposed in a circuit region, which is positioned between the circuit region and the circuit region.
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公开(公告)号：US20230065998A1
公开(公告)日：2023-03-02
申请号：US17894505
申请日：2022-08-24
发明人： Kensaku Isohata
摘要： An oscillator includes a first resonator element, a circuit element configured to oscillate the first resonator element to generate an oscillation signal, a first package which includes a substrate, and has a housing space configured to house the first resonator element and the circuit element at one principal surface side of the substrate, a second resonator element which is disposed at another principal surface side of the substrate, and an oscillation frequency of which is controlled based on the oscillation signal, and a leg part which is disposed at the another principal surface side of the substrate, and which is arranged so as to surround the second resonator element in a plan view of the substrate.
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公开(公告)号：US20220407516A1
公开(公告)日：2022-12-22
申请号：US17350727
申请日：2021-06-17
IPC分类号： H03K17/95 , H03B5/04 , H03B5/12 , H03K17/732
摘要： A system includes a sensor integrated circuit (IC), including a driver adapted to be coupled to an oscillator, the driver including first and second transistors. The sensor IC includes an amplitude control amplifier coupled to the first transistor. The sensor IC also includes a common mode control amplifier coupled to the second transistor. The sensor IC includes a handover control circuit coupled to the amplitude control amplifier and configured to hand off an operation from the sensor IC to a different sensor IC, the handover control circuit including a resistor network coupled to a switch network.
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公开(公告)号：US11522496B2
公开(公告)日：2022-12-06
申请号：US17387172
申请日：2021-07-28
发明人： Norihito Matsukawa , Manabu Kondo
IPC分类号： H03B5/32 , H03B5/04 , H03L1/04 , H01L41/053 , H03L1/02
摘要： An oscillator includes: an outer package; an inner package accommodated in the outer package and fixed to the outer package via a heat insulating member; a vibration element accommodated in the inner package; a temperature sensor; a first circuit element accommodated in the inner package and including an oscillation circuit configured to oscillate the vibration element and generate a temperature-compensated oscillation signal based on the temperature sensor; and a second circuit element fixed to the outer package and including a frequency control circuit configured to control a frequency of the oscillation signal.
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公开(公告)号：US11456700B1
公开(公告)日：2022-09-27
申请号：US17407665
申请日：2021-08-20
发明人： John Day
摘要： An oscillator includes dual resonators mounted in a helium filled coldweld holder. One resonator operates at anti-resonance into a load capacitance of about 20 picofarads, and operates on a third overtone frequency under noncontrolled temperature conditions. The other resonator operates on a fundamental mode at anti-resonance in a load capacitance of about 32 picofarads. Resonator crystals in a dual-crystal resonator may include a theta-angle shift to equalize frequency versus temperature curves at temperature extremes.
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公开(公告)号：US11456699B1
公开(公告)日：2022-09-27
申请号：US17335800
申请日：2021-06-01
发明人： Eric Bohannon , Kevin Fronczak , Jason Inman
摘要： Oscillator circuits, electronic devices, and methods are disclosed. In one embodiment, an oscillator circuit includes a plurality of oscillator transistors comprising a plurality of gates, a plurality of adjustment transistors coupled to the plurality of gates, a differential output coupled to the plurality of oscillator transistors, a plurality of current transistors configured to receive one or more mixed bias current outputs, and generate a main current based on the one or more mixed bias current outputs, the one or more mixed bias current outputs and the main current being substantially constant over a range of temperatures, and one or more switches configured to set an oscillation frequency of the differential output by driving a first portion of a main current through at least one of the plurality of oscillator transistors, and driving a second portion of the main current through at least one of the plurality of adjustment transistors.
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公开(公告)号：US20220294392A1
公开(公告)日：2022-09-15
申请号：US17691410
申请日：2022-03-10
发明人： Atsushi Matsuo , Ryuta Nishizawa
摘要： A vibrator includes: a vibration element that includes a pair of first excitation electrodes formed at the first vibration portion, a pair of second excitation electrodes formed at the second vibration portion, and a pair of third excitation electrodes formed at the third vibration portion, in which one second excitation electrode of the pair of second excitation electrodes is formed at a first inclined surface that is inclined with respect to two main surfaces, and one third excitation electrode of the pair of third excitation electrodes is formed at a second inclined surface that is inclined with respect to the two main surfaces and the first inclined surface; and a package that houses the vibration element. The vibration element includes a fixing portion to be fixed to the package. The fixing portion is provided between the first vibration portion and the second and third vibration portions.
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公开(公告)号：US20220239299A1
公开(公告)日：2022-07-28
申请号：US17580968
申请日：2022-01-21
发明人： Hisahiro Ito , Shoichiro Kasahara
摘要： An integrated circuit apparatus includes an oscillation circuit that generates an oscillation signal by using a resonator, an output buffer circuit that outputs a clock signal based on the oscillation signal, a DC voltage generation circuit that generates a DC voltage used to generate the oscillation signal or the clock signal, a power source pad to which a power source voltage is supplied, a ground pad to which a ground voltage is supplied, and a clock pad via which the clock signal is outputted. The ground pad and the DC voltage generation circuit are disposed so as to overlap with each other in the plan view.
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公开(公告)号：US20220239254A1
公开(公告)日：2022-07-28
申请号：US17158920
申请日：2021-01-26
发明人： Jung-Hwa Choi
摘要： Temperature compensated oscillators and associated methods are disclosed. The oscillator may include an inverter with a variable load configured to provide different conductance values based on an operating temperature of the oscillator. The variable load includes two or more branches in parallel, where each branch has a unique conductance value different from each other. Further, the variable load is coupled to a temperature sensor that generates signals based on determining the operating temperature. The signals of the temperature sensor can activate one or more branches of the variable load. As a result, the inverter may trigger at different voltage levels such that variations in the frequency of the clock signal that the oscillator generates can be reduced across different operating temperatures.
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公开(公告)号：US11323067B2
公开(公告)日：2022-05-03
申请号：US17235270
申请日：2021-04-20
发明人： Masafumi Nakatani , Hiroki Murakami
IPC分类号： H03B5/04 , G05F3/26 , H03K3/0232 , H03K3/011 , H03K3/0231 , G05F1/573 , H03K5/135 , G05F1/56
摘要： The present invention provides an oscillator circuit and a semiconductor integrated circuit, which can suppress the upper limit of the frequency of a clock signal due to an error of the constant current circuit. The oscillator circuit of the present invention includes a constant current circuit, an oscillator, and a current limiting circuit. The constant current circuit generates a first output current according to a supply voltage. The current limiting circuit receives the first output current and generates a second output current, and establishes an upper limit for the second output current when the supply voltage drops below a lower limit of a guaranteed operational range of the constant current circuit. The oscillator generates a clock signal according to the second output current. By establishing the upper limit for the second output current, the upper limit of the frequency of the clock signal can be suppressed.
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