公开(公告)号：US11005486B2

公开(公告)日：2021-05-11

申请号：US16802701

申请日：2020-02-27

Applicant: Seiko Epson Corporation

Inventor： Yasunori Onishi ,  Koji Chindo ,  Nobuhito Hayashi

IPC: H03L7/26 ,  H01S5/0687 ,  H03L7/02

Abstract: An atomic oscillator includes: an atom cell in which alkali metal atoms are accommodated; a light-emitting element that emits light beams for exciting the alkali metal atoms toward the atom cell; a shield that includes a first member, a second member, and a high thermal resistance portion and accommodates the atom cell, the first member and the second member being members having a magnetic shielding property, and the high thermal resistance portion being provided between the first member and the second member and having a thermal resistance higher than thermal resistances of the first member and the second member; a temperature control element that controls a temperature of the first member; a heater that is thermally coupled to the second member; and a light-receiving element that receives light beams passing through the atom cell.

公开(公告)号：US10784874B1

公开(公告)日：2020-09-22

申请号：US16783096

申请日：2020-02-05

Applicant: Intel Corporation

Inventor： Suyoung Bang ,  Eric Samson ,  Wootaek Lim ,  Charles Augustine ,  Muhammad Khellah

IPC: H03L7/02 ,  H03M1/30 ,  H03M1/38 ,  G04F10/00 ,  H03L7/081 ,  H03L7/085

Abstract: An all-digital voltage monitor (ADVM) generates a multi-bit output code that changes in proportion to a voltage being monitored, by leveraging the voltage impact on a gate delay. ADVM utilizes a simple delay chain, which receives a clock-cycle-long pulse every clock cycle, such that the monitored supply voltage is sampled for one full cycle every cycle. The outputs of all delay cells of the delay chain collectively represents a current voltage state as a digital thermometer code. In AVDM, a voltage droop event thus results in a decrease in the output code from a nominal value, while an overshoot results in an increase in the output code.

公开(公告)号：US20200162059A1

公开(公告)日：2020-05-21

申请号：US16683586

申请日：2019-11-14

Applicant: Infineon Technologies AG

Inventor： Florian Renneke ,  Jaafar Mejri

IPC: H03K3/0231 ,  H03K4/502 ,  H03L7/02 ,  H03L7/099 ,  H03L7/18 ,  G01R27/26

Abstract: A method of operating a relaxation oscillator includes determining a measure of a propagation delay of a detection device of a relaxation oscillator and increasing a charging rate of a capacitor device of the relaxation oscillator for a time duration based on the determined measure of the propagation delay.

公开(公告)号：US10551428B2

公开(公告)日：2020-02-04

申请号：US15685570

申请日：2017-08-24

Applicant: Microchip Technology Incorporated

Inventor： Ajay Kumar ,  Hyunsoo Yeom

IPC: G01R31/28 ,  H03L1/00 ,  H03L1/02 ,  H03L7/02

Abstract: Embodiments of the present disclosure include a microcontroller with a frequency test circuit, a device-under-test (DUT) input, and a calculation engine circuit. The calculation engine circuit is configured to compare a measured frequency from the frequency test circuit measured from the DUT input to a reference frequency stored in memory, and, based on the comparison, adjust frequency of the DUT generating the DUT input.

公开(公告)号：US10483985B2

公开(公告)日：2019-11-19

申请号：US15834342

申请日：2017-12-07

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  Research & Business Foundation SUNGKYUNKWAN UNIVERSITY

Inventor： Chisung Bae ,  Sangjoon Kim ,  Yoonmyung Lee ,  Jaehong Jung ,  Jung-Hoon Chun

IPC: H03L3/00 ,  H03L1/00 ,  H03L5/00 ,  H03L7/099 ,  H03L7/02 ,  H03L7/06

Abstract: An oscillator using a supply regulation loop and a method of operating the oscillator are provided. The oscillator includes a reference voltage generator configured to generate reference voltages from a supply voltage, a supply regulation loop circuit including a first operational amplifier and a transistor, the first operational amplifier being configured to receive a first reference voltage of the reference voltages, and the transistor being connected to an output terminal of the first operational amplifier, and a frequency locked loop (FLL) circuit configured to generate a clock signal, based on an input voltage determined based on a current flowing in the transistor and a second reference voltage of the reference voltages, wherein the first operational amplifier may include an input terminal configured to receive the first reference voltage and to receive negative feedback from the transistor, and the output terminal being configured to generate an output voltage independent of noise of the supply voltage.

公开(公告)号：US09825637B2

公开(公告)日：2017-11-21

申请号：US15296082

申请日：2016-10-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Abhijit Kumar Das

IPC: H03L7/02 ,  G06F1/04

CPC classification number: H03L7/02 ,  G06F1/04

Abstract: A system, method and apparatus for tuning an internal oscillator to a desired frequency F1 is shown and uses an RC delay element that comprises a resistor, a capacitor and a comparator. The method includes receiving a clock signal from an oscillator to be tuned, triggering charging of the RC delay element, and N clock cycles after triggering the charging, the method determines whether the charge on the precision RC delay element is higher than or lower than a reference voltage. Correction to the clock frequency is based on the results.

公开(公告)号：US09716501B2

公开(公告)日：2017-07-25

申请号：US15059977

申请日：2016-03-03

Applicant: SEIKO EPSON CORPORATION

Inventor： Akira Shirao

IPC: H03K3/02 ,  H03K19/0185 ,  H03L7/099 ,  H03B5/00 ,  H03B5/10 ,  H03B5/04 ,  H03L7/097 ,  H03L7/02 ,  H03L7/00 ,  H03L7/089 ,  H03K3/011 ,  H03K3/03

CPC classification number: H03K19/018521 ,  H03B5/00 ,  H03B5/04 ,  H03B5/10 ,  H03K3/011 ,  H03K3/0315 ,  H03L7/00 ,  H03L7/02 ,  H03L7/0891 ,  H03L7/097 ,  H03L7/099

Abstract: A CR oscillation circuit includes inverters forming a loop for circulation of a signal, CR time constant circuits inserted into the loop for delaying the signal, each circuit having a capacitor, a plurality of resistance elements, and a transmission gate that selects an arbitrary resistance element of the plurality of resistance elements as a charge and discharge path of the capacitor, and a gate voltage generation circuit as means for outputting a gate voltage for controlling ON/OFF of each transmission gate that outputs a constant voltage in conjunction of a threshold voltage of a field-effect transistor as a gate voltage for turning ON the transmission gate.

公开(公告)号：US09444468B2

公开(公告)日：2016-09-13

申请号：US14138290

申请日：2013-12-23

Applicant: Infineon Technologies AG

Inventor： David Astrom ,  Andreas Fugger ,  Herwig Wappis

IPC: H03K3/26 ,  H03L7/06 ,  H03L7/18 ,  H03L7/02 ,  H03L7/00 ,  H03K3/0231

CPC classification number: H03L7/06 ,  H03K3/0231 ,  H03L7/00 ,  H03L7/02 ,  H03L7/18

Abstract: Oscillator devices and corresponding methods are disclosed. In some embodiments an apparatus includes an oscillator circuit arrangement, a frequency variable resistor circuit coupled to an output of the oscillator circuit arrangement and a reference resistor circuit. The apparatus further includes a sample and hold circuit, wherein a first input of the sample and hold circuit is coupled to an output of the reference resistor circuit and a second input of the sample and hold circuit is coupled to an output of the frequency variable resistor circuit, wherein an output of the sample and hold circuit is coupled with an input of the oscillator circuit arrangement.

Abstract translation: 公开了振荡器装置和相应的方法。 在一些实施例中，一种装置包括振荡器电路装置，耦合到振荡器电路装置的输出的频率可变电阻电路和参考电阻电路。 该装置还包括采样和保持电路，其中采样和保持电路的第一输入耦合到参考电阻电路的输出，并且采样和保持电路的第二输入耦合到频率可变电阻器 电路，其中所述采样和保持电路的输出与所述振荡器电路装置的输入耦合。

公开(公告)号：US09356606B2

公开(公告)日：2016-05-31

申请号：US14339113

申请日：2014-07-23

Applicant: Silicon Laboratories Inc.

Inventor： Aaron J. Caffee ,  Brian G. Drost ,  Hendricus de Ruijter

IPC: H03B1/00 ,  H03L1/00 ,  H03B5/12 ,  H03L7/02 ,  H03L1/02 ,  H03L7/183

CPC classification number: H03B5/12 ,  H03B1/00 ,  H03B5/36 ,  H03L1/026 ,  H03L7/02 ,  H03L7/183 ,  H03L7/1976

Abstract: A clock generator comprises a free-running oscillator and a tunable frequency synthesizer. The free-running oscillator has an output for providing an oscillator clock signal. The tunable frequency synthesizer is coupled to the free-running oscillator and provides a clock output signal in response to the oscillator clock signal and a frequency control signal. The frequency control signal corresponds to a measured characteristic of the free-running oscillator.

Abstract translation: 时钟发生器包括自由振荡器和可调频率合成器。 自由振荡器具有用于提供振荡器时钟信号的输出。 可调谐频率合成器耦合到自由振荡器，并响应振荡器时钟信号和频率控制信号提供时钟输出信号。 频率控制信号对应于自由振荡器的测量特性。

公开(公告)号：US09297842B2

公开(公告)日：2016-03-29

申请号：US12863005

申请日：2008-11-30

Applicant: Fujio Kurokawa

Inventor： Fujio Kurokawa

IPC: G01R23/15 ,  H03L7/02 ,  H02M3/156

CPC classification number: G01R23/15 ,  H02M3/156 ,  H03L7/02

Abstract: Disclosed are a device and a method for comparing a detected frequency signal (first frequency signal) and a second frequency signal which is obtained by delaying the detected frequency, to determine whether the frequency transitioned to a predetermined area on high frequency side or reached a predetermined value on the upward direction side. The frequency detection device (1) comprises: a delayed signal output circuit (11) that outputs a second frequency signal (F2) obtained by delaying the first frequency signal (F1), which has a frequency that changes over time, by a set period (Δi); and a determination circuit (12), which inputs the first frequency signal (F1) and the second frequency signal (F2), determines whether or not the cycle of the first frequency signal (F1) is included in the cycle of the second frequency signal (F2) and/or whether or not the cycle of the second frequency signal (F2) is included in the cycle of the first frequency signal (F1), and outputs a determination signal.

Abstract translation: 公开了一种用于比较检测频率信号（第一频率信号）和通过延迟检测频率而获得的第二频率信号的装置和方法，以确定频率是否转变到高频侧的预定区域或达到预定的 值向上方。 频率检测装置（1）包括：延迟信号输出电路（11），其输出通过将具有随时间变化的频率的第一频率信号（F1）延迟设定周期而获得的第二频率信号（F2） （＆Dgr; i）; 以及输入第一频率信号（F1）和第二频率信号（F2）的确定电路（12），确定第一频率信号（F1）的周期是否包括在第二频率信号 （F2）和/或第二频率信号（F2）的周期是否包括在第一频率信号（F1）的周期中，并输出确定信号。