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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.
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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.
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公开(公告)号：US20230194578A1
公开(公告)日：2023-06-22
申请号：US17703485
申请日：2022-03-24
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.
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公开(公告)号：US11641195B2
公开(公告)日：2023-05-02
申请号：US15419779
申请日：2017-01-30
申请人： Snap One, LLC
IPC分类号： H03K5/1536 , G01R19/165
摘要： An electronic device for controlling switching timing is described. The electronic device includes load voltage measuring circuitry configured to measure a load voltage to produce a load voltage measurement. The electronic device also includes a processor coupled to the load voltage measuring circuitry. The processor is configured to determine whether a load voltage spike is indicated by the load voltage measurement. The processor is configured to control switching timing based on whether a load voltage spike is indicated.
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公开(公告)号：US11562730B2
公开(公告)日：2023-01-24
申请号：US17865408
申请日：2022-07-15
发明人： Takashi Ninagawa
IPC分类号： G10K11/178 , H03K5/1536 , H03M1/12 , H03M3/00
摘要： An ANC system is provided, including an AD converter performing an AD conversion on an external noise signal; an ANC signal generator generating an ANC signal for canceling a noise component arriving at ears of a user based on an output signal of the AD converter; a level detector detecting a level of the output signal and causes the ANC signal generator to power down in response to the level; and a zero-cross detector detecting a zero-cross timing of the ANC signal. The level detector starts measuring a time when the level is equal to or less than a first threshold value, and causes the ANC signal generator to perform a power down operation when the zero-cross timing is detected after the measured time exceeds the predetermined value, and causes the ANC signal generator to exit from the power down operation when the level exceeds a second threshold value.
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公开(公告)号：US20220375450A1
公开(公告)日：2022-11-24
申请号：US17865408
申请日：2022-07-15
发明人： TAKASHI NINAGAWA
IPC分类号： G10K11/178 , H03K5/1536
摘要： An ANC system is provided, including an AD converter performing an AD conversion on an external noise signal; an ANC signal generator generating an ANC signal for canceling a noise component arriving at ears of a user based on an output signal of the AD converter; a level detector detecting a level of the output signal and causes the ANC signal generator to power down in response to the level; and a zero-cross detector detecting a zero-cross timing of the ANC signal. The level detector starts measuring a time when the level is equal to or less than a first threshold value, and causes the ANC signal generator to perform a power down operation when the zero-cross timing is detected after the measured time exceeds the predetermined value, and causes the ANC signal generator to exit from the power down operation when the level exceeds a second threshold value.
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公开(公告)号：US11488572B2
公开(公告)日：2022-11-01
申请号：US16879751
申请日：2020-05-20
发明人： Takashi Ninagawa
IPC分类号： G10K11/178 , H03K5/1536 , H03M1/12 , H03M3/00
摘要： An ANC system includes an AD converter which performs AD conversion on an external noise signal, an ANC signal generator which generates an ANC signal for canceling a noise component arriving at the ears of a user based on an output signal of the AD converter, and a level detector which detects a level of the output signal and causes the ANC signal generator to power down in response to the level. The level detector measures a time for which the level is equal to or less than a predetermined first threshold value, causes the ANC signal generator or a portion of blocks of the AD converter to power down after the measured time exceeds a predetermined value, and causes the ANC signal generator or a portion of blocks of the AD converter to return from the power down when the level exceeds a predetermined second threshold value.
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公开(公告)号：US20220034946A1
公开(公告)日：2022-02-03
申请号：US17499138
申请日：2021-10-12
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
摘要： A zero-crossing detection circuit includes a zero-crossing detection unit arranged to compare 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 an AC signal is applied, so as to generate a first comparison signal, and a logic unit arranged to estimate a zero cross of the AC signal from the first comparison signal so as to generate a zero-crossing detection signal. The zero-crossing detection circuit preferably includes a monitoring unit arranged to adjust the first monitoring target signal and the second monitoring target signal to be suitable for input to the zero-crossing detection unit. The logic unit preferably counts a period of the first comparison signal and estimates a zero cross of the AC signal using a count value thereof.
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公开(公告)号：US11005465B1
公开(公告)日：2021-05-11
申请号：US16741033
申请日：2020-01-13
IPC分类号： H03K5/153 , H03K5/1536 , H03K5/24
摘要： Provided are embodiments for a system including a zero-cross circuit. The system includes a first channel and a second channel Each channel includes a generator, a generator relay, and a bus tie relay. In addition, the system includes a zero-cross circuit, wherein the zero-cross circuit synchronizes the operation of the first and second channel, and at least one controller configured to control the operation of the first channel and the second channel based on an input from the zero-cross circuit. Also provided is a method for operating the zero-cross circuit with low phase delay. The method includes receiving an inverting input, receiving a non-inverting input, and comparing the inverting input and the non-inverting input. The method also includes receiving feedback from an output of the comparator; and outputting a waveform based on the comparison of the inverting input and the non-inverting input and the feedback.
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10.发明授权公开(公告)号：US10778034B2
公开(公告)日：2020-09-15
申请号：US16207848
申请日：2018-12-03
IPC分类号： H03K5/1532 , H02J50/10 , H03K19/20 , H02J50/80 , H03K5/1536 , H03K5/24 , H04B5/00 , H04B5/02 , H03K5/00
摘要： A primary side wireless power transmitter inductively couplable to a secondary side wireless power receiver for supplying power to the wireless power receiver for receiving communications from the secondary side wireless power receiver through the inductive coupling comprises a primary side tank circuit receiving a signal on from the secondary side wireless power receiver. A phase delay or time delay circuit generates a fixed delay clock signal. A sample and hold circuit samples a tank circuit voltage utilizing the fixed phase or time delayed clock signal. A comparator is coupled to an output of the sample and hold circuit for extracting data or commands from the signal stream. A method of operating a primary side wireless transmitter inductively coupled to a secondary side wireless power receiver for supplying power to the wireless power receiver to power a load coupled to the receiver is also disclosed.
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