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1. 发明公开

US20230378949A1 ZERO-CROSS DETECTION DEVICE AND LOAD DRIVING SYSTEM 审中-公开
公开(公告)号：US20230378949A1
公开(公告)日：2023-11-23
申请号：US18309892
申请日：2023-05-01
申请人： Rohm Co., Ltd.
发明人： Natsuki YAMAMOTO , Satoru NATE
IPC分类号： H03K5/1536 , G01R19/04 , G01R19/175
CPC分类号： H03K5/1536 , G01R19/04 , G01R19/175
摘要： A zero-cross detection device includes: an input terminal configured to receive an input voltage via a diode from an application terminal for an alternating-current voltage relative to a reference potential; an input circuit including a resistor between the input terminal and a terminal at the reference potential; a period detection circuit configured to detect the length of the period of the alternating-current voltage based on the interval of the timings at which the input voltage exceeds a threshold voltage; a peak detection circuit configured to detect the peak timing at which the input voltage reaches a peak in each period of the alternating-current voltage; and a zero-cross timing detection circuit configured to detect the zero-cross timing of the alternating-current voltage based on the results of detection by the period detection circuit and the peak detection circuit.

2. 发明公开

US20230358792A1 ZERO-CROSSING DETECTION CIRCUIT 审中-公开
公开(公告)号：US20230358792A1
公开(公告)日：2023-11-09
申请号：US18348701
申请日：2023-07-07
申请人： Rohm Co., Ltd.
发明人： Satoru Nate , Akinobu Sawada , Natsuki Yamamoto
IPC分类号： G01R19/175 , H02M1/08 , H03K5/1536
CPC分类号： G01R19/175 , H02M1/083 , H03K5/1536
摘要： A zero-crossing detection circuit includes a logic unit and an input stop detection unit. The logic unit is configured to estimate a zero cross of an AC signal in accordance with at least one of a first monitoring target signal and a second monitoring target signal, respectively input through diodes from a first node and a second node between which the AC signal is applied, so as to generate a zero-crossing detection signal. The input stop detection unit is configured to compare the first monitoring target signal with the second monitoring target signal after giving an offset to one of them so as to generate an input stop detection signal. The logic unit is configured to fix a logic level of the zero-crossing detection signal in accordance with the input stop detection signal.

3. 发明公开

US20230194578A1 Zero-Crossing Detection Circuit 审中-公开
公开(公告)号：US20230194578A1
公开(公告)日：2023-06-22
申请号：US17703485
申请日：2022-03-24
申请人： Hangzhou Lianxintong Semiconductor Co., Ltd.
发明人： Li-Yu Chiu , Hsin-Hsien Li
IPC分类号： G01R19/175 , H02M1/08 , H03K5/1536
CPC分类号： G01R19/175 , H02M1/083 , H03K5/1536 , H02M7/06
摘要： The present disclosure discloses a zero-crossing detection circuit, including: a zero-crossing judgment module, having a first end and a second end, wherein the first end is connected to a power supply and the second end is grounded; a photoelectric coupler, connected to the zero-crossing judgment module; an optocoupler driving module, connected to the photoelectric coupler; and an energy storage capacitor, wherein the energy storage capacitor is configured to provide excitation power for the photoelectric coupler and the optocoupler driving module.

4. 发明申请

US20180034388A1 ELECTRIC WORKING MACHINE AND METHOD FOR SMOOTHING AC POWER SUPPLIED THERETO 审中-公开
公开(公告)号：US20180034388A1
公开(公告)日：2018-02-01
申请号：US15657484
申请日：2017-07-24
申请人： MAKITA CORPORATION
发明人： Yuki KAWAI , Itsuku KATO
IPC分类号： H02P1/02 , H02M7/06 , H02M1/36 , H03K5/1536 , H03K17/567
CPC分类号： H02P1/022 , H02H9/002 , H02M1/36 , H02M7/062 , H02P6/20 , H02P29/0241 , H03K5/1536 , H03K17/567
摘要： An electric working machine according to one aspect of the present disclosure comprises a motor, a rectifier circuit, a capacitor, a series switching element, a resistive element, a drive circuit, a peak voltage value acquirer, and a controller. The capacitor smooths power rectified by the rectifier circuit. The series switching element is coupled in series with the capacitor. The resistive element is coupled in parallel with the series switching element. The controller brings the series switching element into conduction in a case where AC power is inputted to the rectifier circuit and where a specified conducting condition based on a peak voltage value acquired by the peak voltage value acquirer is satisfied.

5. 发明申请

US20170310288A1 SYSTEMS AND METHODS FOR PREDICTIVE SWITCHING IN AUDIO AMPLIFIERS 审中-公开
公开(公告)号：US20170310288A1
公开(公告)日：2017-10-26
申请号：US15136548
申请日：2016-04-22
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Tejasvi DAS , John L. MELANSON , Eric J. KING
IPC分类号： H03F3/183 , H03K5/1536 , H03F3/217 , H04R3/00
CPC分类号： H03F3/183 , H03F1/0222 , H03F1/025 , H03F1/305 , H03F3/187 , H03F3/2175 , H03F2200/03 , H03F2200/102 , H03F2200/228 , H03F2200/321 , H03F2200/471 , H03F2200/48 , H03F2200/504 , H03F2200/511 , H03F2200/78 , H03K5/1536 , H04R3/007
摘要： An audio amplifier circuit for providing an output signal to an audio transducer may include a power amplifier and a control circuit. The power amplifier may include an audio input for receiving an audio input signal, an audio output for generating the output signal based on the audio input signal, and a power supply input for receiving a power supply voltage, wherein the power supply voltage is variable among at least a first supply voltage and a second supply voltage greater than the first supply voltage. The control circuit may be configured to predict, based on one or more characteristics of a signal indicative of the output signal, an occurrence of a condition for changing the power supply voltage, and responsive to predicting the occurrence of the condition, change, at an approximate zero crossing of the signal indicative of the output signal, the power supply voltage.

6. 发明授权

US09722563B2 System and method for high input capacitive signal amplifier 有权
公开(公告)号：US09722563B2
公开(公告)日：2017-08-01
申请号：US15230946
申请日：2016-08-08
申请人： Infineon Technologies AG
发明人： Michael Kropfitsch , Jose Luis Ceballos
IPC分类号： H03G7/08 , H03G7/06 , H03F1/32 , H03F3/187 , H03F3/45 , H03G7/00 , H03G3/00 , H04R3/00 , H04R23/00 , H03G3/30 , H03K5/1532 , H03K5/1536 , H04R19/04
CPC分类号： H03G7/08 , H03F1/3211 , H03F3/187 , H03F3/45475 , H03F2200/555 , H03F2203/45166 , H03F2203/45526 , H03G3/002 , H03G3/3005 , H03G3/3089 , H03G7/002 , H03G7/06 , H03K5/1532 , H03K5/1536 , H04R3/00 , H04R19/04 , H04R23/00 , H04R2201/003
摘要： In accordance with an embodiment, a method includes determining an amplitude of an input signal provided by a capacitive signal source, compressing the input signal in an analog domain to form a compressed analog signal based on the determined amplitude, converting the compressed analog signal to a compressed digital signal, and decompressing the digital signal in a digital domain to form a decompressed digital signal. In an embodiment, compressing the analog signal includes adjusting a first gain of an amplifier coupled to the capacitive signal source, and decompressing the digital signal comprises adjusting a second gain of a digital processing block.

7. 发明授权

US09577623B2 Capacitive parametric zero crossing detector device, circuit and method 有权
标题翻译：电容参数过零检测装置，电路及方法
公开(公告)号：US09577623B2
公开(公告)日：2017-02-21
申请号：US14021910
申请日：2013-09-09
申请人： Microchip Technology Incorporated
发明人： Ching Chu , Benedict Choy , Andy Tu
IPC分类号： H03K5/1536 , G01R19/175
CPC分类号： H03K5/1536 , G01R19/175
摘要： A capacitive parametric zero crossing detection circuit has a nonlinear voltage controlled capacitive device coupled to an input voltage to convert a zero crossing current pulse into zero crossing voltage signal.
摘要翻译：电容参数过零检测电路具有耦合到输入电压的非线性压控电容器件，以将过零电流脉冲转换为过零电压信号。

8. 发明申请

US20170012527A1 Output Current Monitor Circuit for Switching Regulator 有权
标题翻译：开关稳压器的输出电流监测电路
公开(公告)号：US20170012527A1
公开(公告)日：2017-01-12
申请号：US14795147
申请日：2015-07-09
申请人： Dialog Semiconductor (UK) Limited
发明人： Seiichi Ozawa
IPC分类号： H02M3/158
CPC分类号： H02M3/158 , H02M3/156 , H02M3/1588 , H02M2001/0009 , H03K5/1536
摘要： A circuit and method for providing an improved current monitoring circuit for a switching regulator. A circuit providing switching regulation with an improved current monitor, comprising a pulse width modulation (PWM) controller configured to provide P- and N-drive signals, an output stage connected to said PWM controller and configured to provide switching, comprising a high-side and low-side transistor, driven by said P- and N-drive signals, respectively, a sense circuit configured to provide output current sensing from the output stage during a sampling period when the N-drive signal is active, and a sampling timing generator configured to provide a an n-sampling signal, nsample, to the sense circuit, wherein a start of the n-sampling signal is delayed by a first delay after the sampling period and the n-sampling signal is ended prior to an end of the sampling period by a second delay.
摘要翻译：一种用于为开关调节器提供改进的电流监测电路的电路和方法。一种提供具有改进的电流监视器的开关调节的电路，包括被配置为提供P和N驱动信号的脉冲宽度调制（PWM）控制器，连接到所述PWM控制器并被配置为提供切换的输出级，所述输出级包括高侧和低侧晶体管，分别由所述P驱动信号和N驱动信号驱动，所述感测电路被配置为在所述N驱动信号有效时在采样周期期间从所述输出级提供输出电流感测，以及采样定时发生器被配置为向所述感测电路提供n采样信号ns采样，其中所述n采样信号的开始在所述采样周期之后延迟第一延迟，并且所述n采样信号在所述采样周期的结束之前结束采样周期延迟一秒。

9. 发明授权

US09444441B2 Zero-crossing detection circuit and method for synchronous step-down converter 有权
标题翻译：用于同步降压转换器的过零检测电路和方法
公开(公告)号：US09444441B2
公开(公告)日：2016-09-13
申请号：US14541428
申请日：2014-11-14
申请人： Silergy Semiconductor Technology (Hangzhou) LTD
发明人： Jinzhao Hou , Chen Chen
IPC分类号： H02M3/158 , H03K5/1536
CPC分类号： H03K5/1536 , H02M3/158 , H02M3/1588 , Y02B70/1466
摘要： In one embodiment, a zero-crossing detection circuit for a synchronous step-down converter, can include: (i) a state determination circuit configured to compare a drain voltage of a synchronous transistor of the synchronous step-down converter against a reference voltage, and to generate a state digital signal indicative of whether a body diode of the synchronous transistor is turned on; (ii) a logic circuit configured to convert the state digital signal into a counting instruction signal; (iii) a plus-minus counter configured to generate a numerical signal in response to the counting instruction signal; (iv) a DAC configured to generate a correction analog signal based on the numerical signal; and (v) a zero-crossing comparator configured to receive the correction analog signal and the drain voltage of the synchronous transistor, and to provide a zero-crossing comparison signal to a driving circuit of the synchronous step-down converter.
摘要翻译：在一个实施例中，用于同步降压转换器的过零检测电路可以包括：（i）状态确定电路，被配置为将同步降压转换器的同步晶体管的漏极电压与参考电压进行比较，并产生指示同步晶体管的体二极管是否导通的状态数字信号; （ii）逻辑电路，被配置为将所述状态数字信号转换为计数指令信号; （iii）正负计数器，被配置为响应于所述计数指令信号产生数字信号; （iv）配置为基于所述数字信号产生校正模拟信号的DAC; 以及（v）配置成接收所述同步晶体管的校正模拟信号和漏极电压的过零比较器，并且向所述同步降压转换器的驱动电路提供过零比较信号。

10. 发明申请

US20160087619A1 Zero-Crossing Voltage Detection Circuit and Method Thereof 有权
标题翻译：过零电压检测电路及其方法
公开(公告)号：US20160087619A1
公开(公告)日：2016-03-24
申请号：US14836950
申请日：2015-08-26
申请人： GREEN SOLUTION TECHNOLOGY CO., LTD.
发明人： Li-Min LEE , Chao SHAO
IPC分类号： H03K5/1536 , H03K17/13 , H03K5/24
CPC分类号： H03K5/1536 , H03K5/24 , H03K5/2409 , H03K5/2418 , H03K17/13 , H03K17/133
摘要： A zero-crossing voltage detection circuit for detecting a phase voltage of a converter includes a comparator, a first transistor and a second transistor. The first transistor has a first base, a first collector and a first emitter. The first base couples with the first collector. The first emitter receives the phase voltage. The first collector provides a first voltage to a first terminal of the comparator. The second transistor has a second base, a second collector and a second emitter. The second base couples with the first base. The second base couples with the second collector. The second emitter receives a ground voltage. The second collector provides a second voltage to a second terminal of the comparator. The comparator compares the first voltage with the second voltage to generate a zero-crossing voltage signal.
摘要翻译：用于检测转换器的相电压的过零电压检测电路包括比较器，第一晶体管和第二晶体管。第一晶体管具有第一基极，第一集电极和第一发射极。第一个基地与第一个收藏家。第一个发射极接收相电压。第一集电极向比较器的第一端提供第一电压。第二晶体管具有第二基极，第二集电极和第二发射极。第二个基地与第一个基地相配。第二个底座与第二个收集器相连。第二发射器接收地电压。第二集电极向比较器的第二端提供第二电压。比较器比较第一电压和第二电压以产生过零电压信号。

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