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公开(公告)号：US20240283433A1
公开(公告)日：2024-08-22
申请号：US18171413
申请日：2023-02-20
发明人： Vishnu RAVINUTHULA , Tianyu Chang
CPC分类号： H03K3/0315 , H03K3/014 , H03K5/135
摘要： An oscillator circuit includes a ring oscillator and a ramp generator. The ring oscillator includes a first inverter and a second inverter. The first inverter has and a first inverter input, a first inverter output, and a first power terminal. The second inverter has a second inverter input, a second inverter output, and a second power terminal. The second inverter input is coupled to the first inverter output and the second inverter output is coupled to the first inverter input. The ramp generator circuit has a ramp output coupled to the first power terminal and the second power terminal.
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公开(公告)号：US11641191B2
公开(公告)日：2023-05-02
申请号：US17830864
申请日：2022-06-02
摘要： In an embodiment a ring oscillator circuit includes a chain of cascade-coupled inverter stages coupled between an oscillator supply voltage node and a reference voltage node, the oscillator supply voltage node configured to provide an oscillator supply voltage, a current generator circuit coupled between the oscillator supply voltage node and a system supply voltage node configured to provide a system supply voltage, the current generator circuit being configured to inject a current into the oscillator supply voltage node and a biasing circuit including a first bias control transistor and a second bias control transistor coupled in series between the reference voltage node and the oscillator supply voltage node, wherein the first bias control transistor is configured to selectively couple the reference voltage node and the oscillator supply voltage node in response to the oscillator control signal being indicative that the ring oscillator circuit is in an inactive operation state.
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公开(公告)号：US10917076B1
公开(公告)日：2021-02-09
申请号：US16818174
申请日：2020-03-13
发明人： Vishnu Kalyanamahadevi Gopalan Jawarlal , Tamal Das , Avneesh Singh Verma , Sanjeeb Kumar Ghosh
摘要： A ring oscillator includes at least one oscillator stage having a first output and a second output and a start-up circuit. The start-up circuit includes a plurality of AC coupling capacitors receiving the first output and the second output, and a plurality of switches connected to the AC coupling capacitors. The start-up circuit is configured to provide a differential start-up voltage to at least one node of the oscillator using the plurality of switches and the AC coupling capacitors.
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公开(公告)号：US20210036691A1
公开(公告)日：2021-02-04
申请号：US16818174
申请日：2020-03-13
发明人： Vishnu Kalyanamahadevi Gopalan Jawarlal , Tamal Das , Avneesh Singh Verma , Sanjeeb Kumar Ghosh
摘要： A ring oscillator includes at least one oscillator stage having a first output and a second output and a start-up circuit. The start-up circuit includes a plurality of AC coupling capacitors receiving the first output and the second output, and a plurality of switches connected to the AC coupling capacitors. The start-up circuit is configured to provide a differential start-up voltage to at least one node of the oscillator using the plurality of switches and the AC coupling capacitors.
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公开(公告)号：US10659013B2
公开(公告)日：2020-05-19
申请号：US16237727
申请日：2019-01-01
申请人： NXP USA, INC.
发明人： Yang Wang , Jianzhou Wu , Jie Jin , Jiawei Fu
摘要： A start-up circuit for a ring current-controlled oscillator (CCO) includes a replica CCO current generator, a replica ring CCO, and a buffer. The ring CCO is connected to a CCO driver and the buffer. The CCO driver generates a CCO current based on a reference current. The ring CCO generates a CCO output voltage at a first oscillating frequency based on the CCO current. The replica CCO current generator generates a replica CCO current based on a reference voltage. The replica ring CCO generates a replica CCO output voltage at a second oscillating frequency based on the replica CCO current. The buffer provides a first current to the ring CCO when the first oscillating frequency is lower than a desired oscillating frequency, and drains a second current from the ring CCO when the first oscillating frequency is greater than the desired oscillating frequency.
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公开(公告)号：US20190386647A1
公开(公告)日：2019-12-19
申请号：US16440573
申请日：2019-06-13
发明人： David Johnson , Todd Johnson
摘要： A system, method, and apparatus for continuous seed laser pulses supplied to a CW pumped pre-amplifier and/or power-amplifier chain comprises an optical modulator configured to impress pulse signals on an optical signal, a waveform generator configured to establish a structure of the optical signal, and a keep-alive circuit that generates a continuous electrical pulse pattern provided to the optical modulator, wherein the system provides a continuous seed laser pulse structure.
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公开(公告)号：US10469059B1
公开(公告)日：2019-11-05
申请号：US15853152
申请日：2017-12-22
申请人： THE BOEING COMPANY
发明人： Laszlo Hars
摘要： A system for providing security in a computer system is provided. The system includes a ring oscillator including a plurality of logic gates connected in a ring configuration. The system also includes logic circuits to start the ring oscillator by a ring-enable signal and a clock signal provided to a clock input of at least one controlled logic gate of the plurality of logic gates. The clock signal controls the at least one controlled logic gate and thereby synchronizes the ring oscillator to the clock signal. The clock signal is provided to the clock input for a predetermined warm-up duration, and thereafter, the logic circuits restart and operate the ring oscillator without the clock signal.
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公开(公告)号：US20170346468A1
公开(公告)日：2017-11-30
申请号：US15600427
申请日：2017-05-19
发明人： YUKIO OKAZAKI , KAZUTOSHI SATOU , NORIAKI SAITO
CPC分类号： H03K3/014 , G01S7/023 , G01S7/032 , G01S7/28 , G01S13/288 , G01S13/88 , G01S13/931 , G06F1/04 , G06F1/3203 , H03K3/353
摘要： A radar apparatus includes a transmitter including a plurality of circuits that intermittently transmit one or more radar signals, the plurality of circuits being suspended power supplying during a period in which the one or more radar signals are not transmitted, variation detection circuitry that detects process variations of the plurality of circuits, and determination circuitry that determines a startup timing of each of the plurality of circuits in response to the process variations and outputs startup commands in response to the determined startup timings to the plurality of circuits.
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公开(公告)号：US09766650B2
公开(公告)日：2017-09-19
申请号：US14866439
申请日：2015-09-25
发明人： Warren S Snyder
IPC分类号： G06F13/40 , G06F1/08 , G06F1/32 , G06F15/78 , G06G7/06 , H03B5/36 , H03H19/00 , H03K3/012 , H03K3/014 , H03K3/0231 , G06F9/445 , G06F13/10
CPC分类号： G06F13/4068 , G05B19/0423 , G05B2219/25033 , G06F1/08 , G06F1/32 , G06F9/44505 , G06F13/102 , G06F13/36 , G06F13/40 , G06F13/4282 , G06F15/7817 , G06F15/7867 , G06G7/06 , G11C16/10 , H03B5/32 , H03B5/364 , H03H19/004 , H03K3/012 , H03K3/014 , H03K3/02315
摘要： A programmable device includes reconfigurable analog circuitry, reconfigurable digital circuitry, a plurality of input/output (I/O) blocks, and a global mapping system. The global mapping system is configured to selectively couple the plurality of I/O blocks with analog functional units of the reconfigurable analog circuitry and with digital functional units of the reconfigurable digital circuitry.
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公开(公告)号：US5184094A
公开(公告)日：1993-02-02
申请号：US746353
申请日：1991-08-16
申请人： Raymond H. Kohler
发明人： Raymond H. Kohler
CPC分类号： H03K3/0307 , H03K3/014 , H03K3/3545 , Y10S331/03
摘要： Low power oscillator circuits for providing clock signals. The circuits comprise crystal oscillators for providing an input wave form of a specified frequency to the clock circuit, square wave generators having at least two input terminals wherein one of the two input terminals is coupled to the oscillator, and a power output network coupled to the square wave generator for outputting a substantially square wave having substantially the same frequency as the input wave form, the power output network being biased at a high voltage level. Clock circuits described herein provide the advantage of low power oscillation with little power dissipation.
摘要翻译： 用于提供时钟信号的低功耗振荡器电路。 电路包括用于向时钟电路提供特定频率的输入波形的晶体振荡器，具有至少两个输入端的方波发生器，其中两个输入端中的一个耦合到振荡器，以及耦合到该振荡器的功率输出网络 方波发生器，用于输出具有与输入波形基本上相同频率的基本方波，所述功率输出网络被偏置在高电压电平。 本文描述的时钟电路提供了具有很少功率耗散的低功率振荡的优点。
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