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公开(公告)号：US20240313792A1
公开(公告)日：2024-09-19
申请号：US18185325
申请日：2023-03-16
CPC分类号： H03L7/0992 , H03L1/021 , H03L7/087
摘要： In certain aspects, a system includes a voltage-controlled oscillator (VCO), a phase detector configured to receive a reference signal, a frequency divider coupled between an output of the VCO and the phase detector, a phase-to-current circuit coupled to an output of the phase detector, and a temperature circuit configured to output a temperature-dependent voltage. The system also includes a switching circuit configured to selectively couple the phase-to-current circuit to an input of the VCO and configured to selectively couple the temperature circuit to the input of the VCO.
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公开(公告)号：US12094553B2
公开(公告)日：2024-09-17
申请号：US17556363
申请日：2021-12-20
申请人： Rambus Inc.
发明人： Yohan U. Frans , Wayne F. Ellis , Akash Bansal
IPC分类号： G11C7/22 , G01R23/02 , G06F13/16 , G11C8/18 , G11C29/02 , G11C29/50 , H03L1/02 , G01R23/15 , G01R35/00 , G06F1/08 , G06F1/12 , G06F11/16 , G11C7/04
CPC分类号： G11C29/50012 , G01R23/02 , G06F13/1689 , G11C7/22 , G11C7/222 , G11C7/225 , G11C8/18 , G11C29/023 , G11C29/028 , H03L1/02 , G01R23/15 , G01R35/005 , G06F1/08 , G06F1/12 , G06F11/1604 , G11C7/04 , G11C2207/2254
摘要： The disclosed embodiments relate to components of a memory system that support timing-drift calibration. In specific embodiments, this memory system contains a memory device (or multiple devices) which includes a clock distribution circuit and an oscillator circuit which can generate a frequency, wherein a change in the frequency is indicative of a timing drift of the clock distribution circuit. The memory device also includes a measurement circuit which is configured to measure the frequency of the oscillator circuit.
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公开(公告)号：US12088253B2
公开(公告)日：2024-09-10
申请号：US18181094
申请日：2023-03-09
发明人： Koichi Mizugaki
CPC分类号： H03B5/32 , H03B1/02 , H03B5/04 , H03L1/028 , H03L1/04 , H05K1/111 , H05K1/181 , H10N30/88 , H05K2201/10083
摘要： A circuit board includes: a semiconductor substrate including a first surface and a second surface located at an opposite side from the first surface; a circuit provided at a first surface side; a first external electrode provided at a second surface side; a heater provided at the second surface side; and a plurality of through electrodes penetrating the first surface and the second surface and electrically coupling the circuit and the first external electrode or the heater. The heater and the first external electrode do not overlap each other in a plan view.
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4.发明授权公开(公告)号：US11990908B1
公开(公告)日：2024-05-21
申请号：US16807979
申请日：2020-03-03
申请人： SiTime Corporation
CPC分类号： H03K3/0315 , G01K7/32 , H03L1/027 , H03L7/0991 , H03L7/18 , H03L7/1976
摘要： In a high resolution temperature sensor, first and second MEMS resonators generate respective first and second clock signals and a locked-loop reference clock generator generates a reference clock signal having a frequency that is phase-locked to at least one of the first and second clock signals. A frequency-ratio engine within the MEMS temperature sensor oversamples at least one of the first and second clock signals with the reference clock signal to generate a ratio of the frequencies of the first and second clock signals.
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公开(公告)号：US11949378B2
公开(公告)日：2024-04-02
申请号：US17897223
申请日：2022-08-29
申请人： TXC Corporation
发明人： Erh-Shuo Hsu , Wan-Lin Hsieh
摘要： A crystal oscillator and an oscillating device are provided. The crystal oscillator includes a resonator, a low-thermal conductivity glue, an integrated circuit chip, and a heating element. In the resonator, a crystal blank is hermetically encapsulated. The low-thermal conductivity glue wraps the resonator to suppress temperature variation in the resonator. The integrated circuit chip is disposed below the resonator, and the heating element is configured to supply heat to the resonator.
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公开(公告)号：US11855646B2
公开(公告)日：2023-12-26
申请号：US17875882
申请日：2022-07-28
发明人： Yuichi Toriumi
IPC分类号： H03L1/02
摘要： A circuit device includes an oscillation circuit configured to generate an oscillation signal using a resonator, a temperature sensor circuit configured to output temperature detection data, a temperature compensation circuit configured to perform, based on the temperature detection data, temperature compensation on an oscillation frequency of the oscillation signal, a memory configured to store correction data for correcting the temperature detection data to obtain a temperature, and an interface circuit configured to output the temperature detection data and the correction data.
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公开(公告)号：US11831314B1
公开(公告)日：2023-11-28
申请号：US17823655
申请日：2022-08-31
申请人： Apple Inc.
发明人： Simone del Cesta
CPC分类号： H03K3/011 , G05F3/245 , H03K3/023 , H03K3/0315 , H03L1/022
摘要： A ratiometric current source circuit having a reduced temperature dependence is disclosed. An embodiment of the current source circuit includes a first divider circuit configured to generate a reference voltage using a voltage level of a power supply node and a second divider circuit including a first resistor with a first temperature coefficient and a second resistor with a second temperature coefficient. The first resistor is configured to generate a first current using an input voltage and the voltage level of the power supply node and the second resistor is configured to generate a second current using the input voltage. The embodiment further includes a buffer circuit configured to generate the input voltage using the reference voltage and generate an output current using a difference between the first current and the second current.
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公开(公告)号：US11750200B2
公开(公告)日：2023-09-05
申请号：US17624063
申请日：2020-06-19
申请人： ZTE Corporation
发明人： Jun Liu , Zhaobi Wei , Shan Wang , Pei Duan , Mengbi Lei
CPC分类号： H03L7/081 , H03L1/02 , H03L7/0802 , H03L7/10
摘要： Provided is a phase-locked loop circuit, a method for configuring the same, and a communication device. The phase-locked loop circuit includes a phase-locked loop main circuit and a phase temperature compensation circuit. The phase temperature compensation circuit includes at least one phase delay unit connected to the phase-locked loop main circuit and configured to generate a phase shift as a result of a temperature change for cancelling out a phase shift generated by the phase-locked loop main circuit as a result of a temperature change.
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公开(公告)号：US11747216B1
公开(公告)日：2023-09-05
申请号：US17543052
申请日：2021-12-06
申请人： SiTime Coporation
发明人： Michael H. Perrott , Shungneng Lee
IPC分类号： G01K7/22 , G01K7/16 , H03B5/04 , H03B5/30 , H03H9/02 , H03L1/02 , G01K7/34 , G01K7/18 , G01K7/12
CPC分类号： G01K7/226 , G01K7/16 , G01K7/22 , G01K7/34 , H03B5/04 , H03B5/30 , H03H9/02244 , H03L1/02 , G01K7/12 , G01K7/186 , G01K2219/00
摘要： The temperature-dependent resistance of a MEMS structure is compared with an effective resistance of a switched CMOS capacitive element to implement a high performance temperature sensor.
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公开(公告)号：US11705912B2
公开(公告)日：2023-07-18
申请号：US17386774
申请日：2021-07-28
CPC分类号： H03L7/0991 , G05B13/042 , H03L1/00 , H03L1/02 , H03L7/093 , H03L2207/50
摘要： A tracking system for a digital Phase Locked Loop (PLL), the tracking system including a PLL model configured to emulate an actual internal PLL signal, wherein the emulation is based on another internal PLL signal received from the digital PLL and on an estimated analog PLL parameter of the PLL model; and a tracker configured to compare the emulated internal PLL signal with the actual internal PLL signal, and to update the estimated analog PLL parameter according to a minimization algorithm that minimizes a result of the comparison.
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