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1. 发明授权

US11705865B2 Relaxation oscillator, integrated circuit and electronic apparatus 有权
公开(公告)号：US11705865B2
公开(公告)日：2023-07-18
申请号：US17846261
申请日：2022-06-22
申请人： INNOGRIT TECHNOLOGIES CO., LTD.
发明人： Chi Cao , Kangmin Hu
IPC分类号： H03K3/0231 , H03B5/24
CPC分类号： H03B5/24 , H03K3/0231
摘要： The present disclosure relates to a relaxation oscillator, an integrated circuit and an electronic apparatus, the relaxation oscillator comprising a first signal generation module and an oscillation module configured to output a first oscillation signal and a second oscillation signal, the first oscillation signal and the second oscillation signal being opposite in phase, the oscillation module comprising a first switch, a second switch, a capacitor, and a comparison unit. The oscillation module according to the disclosed embodiment using a floating amplifier to implement a comparator, where in a pre-charging stage, the first switch and the second switch are turned on to charge the capacitor, and a common mode of the first oscillation signal and the second oscillation signal is determined; in a comparing stage, the first switch and the second switch are turned off to output the oscillation signal. The embodiment of the present disclosure eliminates the need to provide an additional common mode feedback generation circuit, and does not require an increase in power consumption, achieving the advantages of smaller occupied area, lower power consumption, less noise, and better performance as compared with a relaxation oscillator of the related art.

2. 发明公开

US20230170884A1 Wide Frequency Range Voltage Controlled Oscillator 审中-公开
公开(公告)号：US20230170884A1
公开(公告)日：2023-06-01
申请号：US18071162
申请日：2022-11-29
申请人： Open Silicon, Inc.
发明人： Santosh Mahadeo Narawade , Jithin K , Mohit Gupta
IPC分类号： H03K3/0231 , H03L7/099 , H03K3/03 , H03K5/133
CPC分类号： H03K3/0231 , H03L7/0995 , H03K3/0315 , H03K5/133
摘要： Systems and methods are disclosed for wide frequency range voltage controlled oscillators. For example, an apparatus includes a Voltage Controlled Oscillator (VCO) including a delay cell which includes first and second current sources provided in parallel with one another. The first current source is controlled by a voltage control input connected to a voltage control terminal and the second current source is controlled by a bias voltage input connected to a bias voltage terminal. The first current source provides an alternate current path in the delay cell when the second current source is off. The delay cell is operable to receive an input and produce an output using the alternate current path.

3. 发明申请

US20220302906A1 PRECISION OSCILLATORS THAT USE IMPRECISE COMPONENTS 有权
公开(公告)号：US20220302906A1
公开(公告)日：2022-09-22
申请号：US17838029
申请日：2022-06-10
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Aniruddha ROY , Nitin AGARWAL , Rajavelu THINAKARAN
IPC分类号： H03K3/0231 , H03K4/502 , H03K3/011 , G05F3/26 , G05F3/24 , G05F1/567
摘要： Trimming components within an oscillator comprising: a trim-capable current source, wherein the trim-capable current source comprises a trimmable resistor and a trimmable current component, a comparator comprising a first input terminal that couples to the trim-capable current source and the second input terminal that couples to a reference voltage source, a switch coupled to the first input terminal and the trim-capable current source, and a trim-capable capacitor coupled to the switch, wherein the switch is coupled between the trim-capable capacitor and the trim-capable current source.

4. 发明授权

US11323067B2 Oscillator circuit and semiconductor integrated circuit 有权
公开(公告)号：US11323067B2
公开(公告)日：2022-05-03
申请号：US17235270
申请日：2021-04-20
申请人： Winbond Electronics Corp.
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.

5. 发明授权

US11293891B2 Methods and systems for readout of nanogap sensors 有权
公开(公告)号：US11293891B2
公开(公告)日：2022-04-05
申请号：US16143897
申请日：2018-09-27
申请人： Analog Devices International Unlimited Company
发明人： Michael Coln , Mark Daniel de Leon Alea
IPC分类号： G01N27/327 , G01N33/487 , G01N27/00 , H03K3/03 , G01N27/414 , G01N33/497 , H03K3/0231 , H03M1/60 , B82Y15/00
摘要： Embodiments of the present disclosure relate to various methods and example systems for carrying out analog-to-digital conversion of data acquired by arrays of nanogap sensors. The nanogap sensors described herein may operate as molecular sensors to help identify chemical species through electrical measurements using at least a pair of electrodes separated by a nanogap. In general, the methods and systems proposed herein rely on digitizing the signal as the signal is being integrated, and then integrating the digitized results. With such methods, the higher sample rate used in the digitizer reduces the charge per quantization and, therefore, the size of sampling capacitors used. Consequently, sampling capacitors may be made factors of magnitude smaller, requiring less valuable space on a chip compared to sampling capacitors used in conventional nanogap sensor arrays.

6. 发明授权

US11101807B2 Phase-locked loop (PLL) circuit 有权
公开(公告)号：US11101807B2
公开(公告)日：2021-08-24
申请号：US16216162
申请日：2018-12-11
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Erhan Ozalevli , Mustapha El Markhi , Tuli Dake
IPC分类号： H03L7/18 , H03L7/099 , H03L7/085 , H03L7/113 , H03K3/0231
摘要： One example includes a phase-locked loop (PLL) circuit. The circuit includes a frequency divider and phase detector configured to generate a plurality of non-overlapping switching signals based on an input signal and a PLL output signal. The circuit also includes a linear frequency-to-current (F2I) converter configured to generate a control current having an amplitude that is based on the plurality of non-overlapping switching signals. The circuit further includes a linear current-controlled oscillator configured to generate the PLL output signal to have a frequency and phase to be approximately equal to the input signal based on the amplitude of the control current.

7. 发明授权

US11031940B2 Sensing circuits 有权
公开(公告)号：US11031940B2
公开(公告)日：2021-06-08
申请号：US16225821
申请日：2018-12-19
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： John Paul Lesso
IPC分类号： H03L7/087 , H03L7/099 , H03L7/18 , H03L7/10 , H03K3/0231 , H03L7/085
摘要： This application relates to sensing circuits for sensing a physical property or quantity of interest. The sensing circuit has an oscillator comprising a hysteretic comparator and a loop filter configured to output an oscillation signal. The loop filter comprises a first component with an electrical property that varies with the physical property or quantity of interest. A time constant of the loop filter depends on the electrical property of the first component. A decoder is configured to receive the oscillation signal and provide an indication of any change in frequency of the oscillation signal as an indication of a change in the physical property or quantity of interest. The electrical property may be an impedance, such as a resistance.

8. 发明授权

US11025233B1 Oscillator circuit resistant to noise and jitter 有权
公开(公告)号：US11025233B1
公开(公告)日：2021-06-01
申请号：US16841915
申请日：2020-04-07
申请人： Samsung Electro-Mechanics Co., Ltd.
发明人： Tae Ho Lim
IPC分类号： H03K3/013 , H03K3/011 , H03K4/502 , H03K3/0231
摘要： An oscillator circuit includes a bias circuit, a signal generation circuit, and a control circuit. The bias circuit is configured to generate a reference voltage based on a reference current and a bias resistor. The signal generation circuit is configured to generate a bias current based on the reference current, perform charging and discharging of a capacitor using the bias current, and generate an oscillation signal based on the charging and the discharging of the capacitor. The control circuit is configured to generate a control signal having a constant discharging time, based on the reference voltage and the oscillation signal, controlling the charging and the discharging of the capacitor.

9. 发明授权

US10754369B2 Reference current source and semiconductor device 有权
公开(公告)号：US10754369B2
公开(公告)日：2020-08-25
申请号：US16535372
申请日：2019-08-08
申请人： ROHM CO., LTD.
发明人： Naohiro Nomura , Takatoshi Manabe
IPC分类号： G05F3/26 , H03K3/0231 , G05F3/24 , H03L7/089
摘要： A first transistor and a second transistor have control terminals coupled to each other. A current mirror circuit supplies a current having the same amount as that of a current Iref flowing through a first path including the second transistor to a second path including the first transistor and supplies a current having a predetermined number of times m of a current amount of the current Iref of the first path to a third path separate from the second path. The third transistor and a fourth transistor are provided on the third path. The third transistor has a source coupled to one end of the first transistor, and the fourth transistor has a gate coupled to a gate of the third transistor. A resistor is provided between a source of the fourth transistor and one end of the second transistor.

10. 发明授权

US10727817B2 Real-time clock device, electronic device, and vehicle 有权
公开(公告)号：US10727817B2
公开(公告)日：2020-07-28
申请号：US16597926
申请日：2019-10-10
申请人： SEIKO EPSON CORPORATION
发明人： Masayuki Kamiyama
IPC分类号： H03K3/00 , H03K3/0231 , G06F1/14 , H03B5/36
摘要： A real-time clock device includes an oscillation circuit configured to generate an oscillation signal using a resonator, a clocking circuit configured to generate present time data based on the oscillation signal, an interface circuit configured to receive a time rewriting request and time rewriting data for the present time data from an external device, and a control circuit configured to perform comparison processing of the present time data of the clocking circuit and the time rewriting data to determine whether the time rewriting data is legitimate.

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