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公开(公告)号：US20180167030A1
公开(公告)日：2018-06-14
申请号：US14785823
申请日：2015-09-02
CPC分类号： H03B5/04 , G11C7/1075 , G11C11/40611 , G11C11/40615 , H03B5/24 , H03K3/011 , H03K3/0231 , H03K3/03 , H03K4/502 , H03L1/026
摘要： Apparatuses and methods for temperature independent oscillator circuits are disclosed herein. An example apparatus may include a pulse generator circuit configured to provide a periodic pulse based on the charging and discharging of a capacitor and further based on a reference voltage. The pulse generator circuit may include a capacitor coupled between a first reference voltage and a first node, wherein the capacitor is configured to be charged and discharged through the node in response to the periodic pulse, a resistor and a diode coupled in series between a second node and a second reference voltage, and a comparator coupled to the first and second nodes and configured to provide the periodic pulse based on voltages on the first and second nodes, wherein a period of the periodic pulse is based at least on the resistor and the a current.
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公开(公告)号：US20180145665A1
公开(公告)日：2018-05-24
申请号：US15358782
申请日：2016-11-22
IPC分类号： H03K4/502
CPC分类号： H03K4/502 , H03B1/00 , H03B5/20 , H03B2200/0082 , H03K3/0231 , H03K3/0315 , H03L7/0995
摘要： A relaxation oscillator can provide a smaller and cheaper alternative to a crystal oscillator circuit in a wide variety of applications. A sawtooth relaxation oscillator can include overshoot error integration. Separate and distinct oscillator capacitor charging, overshoot error integration, and reset phases can be provided using separate comparators for first and second oscillation capacitors. Potential advantages can include high accuracy high-frequency clock, convenient trimming during initial calibration, clock frequency stability over temperature and time, fast startup with low overshoot, high power supply rejection, low power, or low noise/jitter. The oscillator can charge an oscillation capacitor up to a target voltage, then interrupt charging before beginning an error integration phase that adjusts the target voltage by integrating an overshoot error of a voltage on the oscillation capacitor. After completing the overshoot error integration, the voltage on the oscillation capacitor can be reset. The techniques described are believed to be capable of improving clock frequency accuracy and other characteristics.
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公开(公告)号：US09923554B2
公开(公告)日：2018-03-20
申请号：US15196524
申请日：2016-06-29
发明人： Byung Joo Hong , Je Hyuk Ryu , Hyung Gu Park , Joong Ho Choi , Hong Jin Kim , Joo Young Lee , Dong Hyeon Seo , Young Jun Park , Jong Woo Lee , Kang Yoon Lee
CPC分类号： H03K4/502 , H02J7/025 , H03F1/025 , H03F3/245 , H03F2200/114 , H03K3/0231 , H03K3/84 , H04J11/0023 , H04L1/242
摘要： A wireless power transmitter includes an amplifier configured to amplify a power; a transmitter configured to resonate the power amplified by the amplifier; and a reference signal provider configured to provide a reference signal to the amplifier and change a frequency of the reference signal.
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公开(公告)号：US20180034450A1
公开(公告)日：2018-02-01
申请号：US15222860
申请日：2016-07-28
发明人： Mingyue Zhao , Jiwei Fan , Michael Munroe
IPC分类号： H03K4/48 , H03K3/3562 , H02M3/158 , H03L7/00
CPC分类号： H03K4/48 , H02M3/1584 , H02M2003/1586 , H03K3/3562 , H03K4/502 , H03L7/00
摘要： A phase generation circuit is disclosed. The circuit includes a ramp generation circuit arranged to generate a ramp signal in synchronization with a synchronization clock signal. A phase selection circuit generates a reference signal in response to a phase selection signal. A comparator has a first input terminal coupled to receive the ramp signal and a second input terminal coupled to receive the reference signal. The comparator produces a phase clock signal at an output terminal.
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公开(公告)号：US09774811B1
公开(公告)日：2017-09-26
申请号：US15277642
申请日：2016-09-27
发明人： Hiroaki Ebihara , Zheng Yang
CPC分类号： H04N5/378 , H03K4/502 , H03K4/56 , H03K5/249 , H03M1/129 , H03M1/1295 , H03M1/56 , H03M1/66 , H04L9/3278
摘要： Apparatuses and methods for image sensors with increased analog to digital conversion range are described herein. An example method may include disabling a first auto-zero switch of a comparator, the first auto-zero switch coupled to a ramp voltage input of the comparator, increasing, by a ramp generator, an auto-zero voltage level of a ramp voltage provided to the ramp voltage input of the comparator, and disabling a second auto-zero switch of the comparator, the second auto-zero switch coupled to a bitline input of the comparator.
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公开(公告)号：US09748935B2
公开(公告)日：2017-08-29
申请号：US15166847
申请日：2016-05-27
发明人： Taesung Kim , Seunguk Yang , Youngbae Park
摘要： Examples of a signal calculator include a voltage multiplier and a time divider. The voltage multiplier copies time information corresponding to a first voltage and generates a third voltage using a second current corresponding to a second voltage during a first period corresponding to the copied time information. The time divider generates an output according to a result of comparing a voltage generated by a first current on the basis of a voltage corresponding to a first time with a second voltage corresponding to a second time.
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公开(公告)号：US09737248B1
公开(公告)日：2017-08-22
申请号：US15190358
申请日：2016-06-23
发明人： Brian Otis , Nathan Pletcher
CPC分类号： A61B5/1477 , A61B5/0004 , A61B5/002 , A61B5/0022 , A61B5/14507 , A61B5/14532 , A61B5/6821 , A61B5/7225 , A61B5/742 , G02C7/04 , H03K3/0377 , H03K4/502 , H04B1/40
摘要： This disclosure relates to systems and/or methods for subtracting in the current domain an output current primary signal from a primary sensor from an output current reference signal from a reference sensor to produce a frequency output signal indicative of the difference between the output current primary signal and the output current reference signal.
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公开(公告)号：US09401703B1
公开(公告)日：2016-07-26
申请号：US14989626
申请日：2016-01-06
发明人： Zhengxiang Wang , Chao Liang , Jian Zhou
IPC分类号： H03K3/26 , H03K7/06 , H03K3/037 , H03K4/502 , H03K5/24 , H03K19/21 , H03L7/18 , H03L7/087 , H03K3/0231 , H03K3/08
摘要： A relaxation oscillator system has a relaxation oscillator and a frequency control (FC) unit. The oscillator includes first and second oscillator sub-circuits and a latch. The first and second oscillator sub-circuits receive from the FC unit, respectively, first and second control signals for controlling corresponding outputs provided to the latch by the first and second oscillator sub-circuits. The latch outputs a variable frequency feedback signal provided to the FC unit. The FC unit receives a frequency control signal for controlling the frequency of an oscillator output signal and generates the first and second control inputs based on the frequency control signal and the feedback signal so that changes to the oscillator frequency are implemented by each oscillator sub-circuit while that sub-circuit is in an idle state to avoid glitches in the oscillator output signal.
摘要翻译： 松弛振荡器系统具有张弛振荡器和频率控制（FC）单元。 振荡器包括第一和第二振荡器子电路和锁存器。 第一和第二振荡器子电路分别从FC单元接收用于控制由第一和第二振荡器子电路提供给锁存器的相应输出的第一和第二控制信号。 闩锁输出提供给FC单元的可变频率反馈信号。 FC单元接收用于控制振荡器输出信号的频率的频率控制信号，并且基于频率控制信号和反馈信号生成第一和第二控制输入，使得振荡器频率的改变由每个振荡器子电路 而该子电路处于空闲状态，以避免振荡器输出信号中的毛刺。
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公开(公告)号：US09356554B2
公开(公告)日：2016-05-31
申请号：US14329939
申请日：2014-07-12
发明人： Kai Yiu Tam , Ali Kiaei , Baher S. Haroun
摘要： A relaxation oscillator reduces temperature sensitivity and phase noise at low offset frequency by periodically swapping a first current and a second current so that after the first current has been input to a first pair of circuits and the second current has been input to a second pair of circuits, the second current is input to the first pair of circuits and the first current is input to the second pair of circuits.
摘要翻译： 松弛振荡器通过周期性交换第一电流和第二电流来降低在低偏移频率下的温度灵敏度和相位噪声，使得在第一电流已经被输入到第一对电路之后，并且第二电流已经被输入到第二对 电路，第二电流被输入到第一对电路，第一电流被输入到第二对电路。
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10.发明授权Comparator, oscillator using the same, dc/dc converter, control circuit thereof, and electronic apparatus 有权比较器，使用其的振荡器，dc / dc转换器，其控制电路和电子设备公开(公告)号：US09244102B2
公开(公告)日：2016-01-26
申请号：US13748946
申请日：2013-01-24
申请人： ROHM CO., LTD.
发明人： Hiroki Kikuchi
CPC分类号： G01R19/10 , H02M3/156 , H03K4/502 , H03K5/2481
摘要： A comparator compares a first input voltage and a second input voltage to generate a comparative output depending on a result of the comparison. The comparator includes a first input terminal configured to receive the first input voltage, a second input terminal configured to receive the second input voltage, a differential pair including a first input transistor whose control terminal is connected with the first input terminal and a second input transistor whose control terminal is connected with the second input terminal, a tail current source configured to supply a tail current to the differential pair, and a load circuit connected to the first input transistor and the second input transistor, and the tail current source increases the tail current, as the first input voltage approaches the second input voltage, depending on the first input voltage.
摘要翻译： 比较器比较第一输入电压和第二输入电压，以根据比较结果产生比较输出。 比较器包括被配置为接收第一输入电压的第一输入端子，被配置为接收第二输入电压的第二输入端子，包括控制端子与第一输入端子连接的第一输入晶体管的差分对，以及第二输入晶体管 其控制端子与第二输入端子连接，尾电流源被配置为向差分对提供尾电流，以及连接到第一输入晶体管和第二输入晶体管的负载电路，并且尾电流源增加尾部 当第一输入电压接近第二输入电压时，取决于第一输入电压。
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