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公开(公告)号：US20200220507A1
公开(公告)日：2020-07-09
申请号：US16683344
申请日：2019-11-14
Applicant: Chung-Fu Chou
Inventor： Chung-Fu Chou
Abstract: The present invention generally relates to a structure and method of audio amplifier by dynamic impedance adjustment, including a power amplifying unit, a loud-speaker, a current sensing unit and a subtraction unit, the power amplifying unit has a fixed closed loop gain, with an input side and an output side; the loud-speaker is electrically connected to the output side of the power amplifying unit; the current sensing unit senses the output current of the power amplifying unit, and the sensed output current is converted into a current control voltage signal; the subtraction unit inputs the audio voltage signal and the feedback current control voltage signal, and outputs the difference of the audio voltage signal minus the current control voltage signal, and inputs it to the input side of the power amplifying unit; thereby, the present invention can improve the output sound quality of the loud-speaker by dynamic impedance adjustment.
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公开(公告)号：US11228250B2
公开(公告)日：2022-01-18
申请号：US16867641
申请日：2020-05-06
Applicant: Chung-Fu Chou
Inventor： Chung-Fu Chou
Abstract: A flyback power switch structure for bridgeless rectifier includes a main transformer, a primary side circuit, a secondary side circuit, and a feedback control circuit. The main transformer includes a primary coil and a secondary coil. The primary side circuit is connected to the input AC power supply and the primary coil of main transformer, and is provided with a first switch component, a second switch component, a third switch component, and a fourth switch component. The secondary side circuit is connected to the secondary coil of said main transformer, generating an output voltage. The feedback control circuit is connected to the secondary side circuit and the first, second, third and fourth switch components of primary side circuit, comparing phase signals according to the feedback signals and the first and second terminal voltages of an input AC power supply to control the actuation of the first, second, third and fourth switch components.
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公开(公告)号：US06812681B1
公开(公告)日：2004-11-02
申请号：US10417539
申请日：2003-04-16
Applicant: Chin-Tsai Hong , Chung-Fu Chou , Chun-Ting Lu , Thou-Vun Pang
Inventor： Chin-Tsai Hong , Chung-Fu Chou , Chun-Ting Lu , Thou-Vun Pang
IPC: G05F140
CPC classification number: H02M3/157
Abstract: A digital dynamic trace adjustment pulse width modulate controller uses a core processing unit to receive a phase signal and outputs a pulse width modulate signal. It is observed that when the output voltage is rising or dropping then changing the pulse width modulate signal of the output end, the duty rate of the phase signal will be maintained at fifty percent degree.
Abstract translation: 数字动态跟踪调节脉宽调制控制器使用核心处理单元接收相位信号并输出脉宽调制信号。 观察到，当输出电压上升或下降时，改变输出端的脉宽调制信号，相位信号的占空比将保持在百分之五十。
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Patent Agency Ranking
公开(公告)号：US20210143777A1
公开(公告)日：2021-05-13
申请号：US16676518
申请日：2019-11-07
Applicant: Chung-Fu Chou
Inventor： Chung-Fu Chou
Abstract: The present invention generally relates to a structure and method of audio amplifier with power feedback, including a power amplifying unit, a loud-speaker, a current sensing unit, a voltage sensing unit and a multiplying unit, the power amplifying unit includes an input side and an output side, the input side inputs an audio voltage signal; and the loud-speaker is electrically connected to an output side of the power amplifying unit; the current sensing unit is electrically connected to the output side of the power amplifying unit and senses the output current of the power amplifying unit and then converted into a current control voltage signal; the voltage sensing unit is electrically connected to the output side of the power amplifying unit, and senses the output voltage of the power amplifying unit to form an output sensing voltage signal; the multiplying unit obtains the voltage of the current control voltage multiplied by the output sensing voltage, and the output side of the multiplying unit is electrically connected to the input side of the power amplifying unit to form a closed loop power feedback structure, accordingly improving the output quality of the amplifier and loud-speaker.
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公开(公告)号：US20210013729A1
公开(公告)日：2021-01-14
申请号：US16505828
申请日：2019-07-09
Applicant: Chung-Fu Chou
Inventor： Chung-Fu Chou
Abstract: The present invention relates generally to a battery charge/discharge management method and system. A lithium battery core and a DC/DC converter are embedded in the battery to generate input or output I/O voltage and current. When the lithium battery core is in the working voltage range, the battery charge/discharge management method comprises the following modes: a1. the overvoltage protection mode is adopted when the charging operation is higher than the preset high charging voltage, the I/O voltage cannot be fed in the battery; a2. it is charging mode when the charging operation voltage is lower than the preset high charging voltage and higher than the minimum rechargeable voltage, the I/O voltage can charge the lithium battery core in the battery; a3. it is protection mode when the I/O voltage is lower than the minimum rechargeable voltage and higher than the maximum dischargeable voltage, no charging/discharging operation; a4. the battery can discharge when the I/O voltage is lower than the maximum dischargeable voltage and higher than the minimum dischargeable voltage, the I/O voltage comprises the output internal reference voltage of DC/DC converter and the electric quantity indication voltage of product scaled down according to the actual voltage of lithium battery core, and the I/O voltage corresponds to dynamic load line characteristic; a5. the I/O voltage load line offset is enlarged when the actual voltage of lithium battery core is lower than the preset low battery voltage; a6. it is negative voltage protection mode when the I/O voltage is lower than 0V, the battery does not perform charging/discharging operation, and I/O terminal to ground short circuit provides a negative current loop; the present invention can provide better electric quantity management and measurement.
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公开(公告)号：US11329610B2
公开(公告)日：2022-05-10
申请号：US16676518
申请日：2019-11-07
Applicant: Chung-Fu Chou
Inventor： Chung-Fu Chou
Abstract: The present invention generally relates to a structure and method of audio amplifier with power feedback, including a power amplifying unit, a loud-speaker, a current sensing unit, a voltage sensing unit and a multiplying unit. The power amplifying unit includes an input side and an output side, the input side inputs an audio voltage signal, and the loudspeaker is electrically connected to an output side of the power amplifying unit. The current sensing unit is electrically connected to the output side of the power amplifying unit and senses the output current of the power amplifying unit and then converts it into a current control voltage signal. The voltage sensing unit is electrically connected to the output side of the power amplifying unit, and senses the output voltage of the power amplifying unit to form an output sensing voltage signal. The multiplying unit obtains the voltage of the current control voltage multiplied by the output sensing voltage, and the output side of the multiplying unit is electrically connected to the input side of the power amplifying unit to form a closed loop power feedback structure. Accordingly, the output quality of the amplifier and loud-speaker is improved.
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公开(公告)号：US11264957B2
公开(公告)日：2022-03-01
申请号：US16683344
申请日：2019-11-14
Applicant: Chung-Fu Chou
Inventor： Chung-Fu Chou
Abstract: The present invention generally relates to a structure and method of audio amplifier by dynamic impedance adjustment, including a power amplifying unit, a loud-speaker, a current sensing unit and a subtraction unit. The power amplifying unit has a fixed closed loop gain, with an input side and an output side; the loud-speaker is electrically connected to the output side of the power amplifying unit; the current sensing unit senses the output current of the power amplifying unit, and the sensed output current is converted into a current control voltage signal; the subtraction unit inputs the audio voltage signal and the feedback current control voltage signal, and outputs the difference of the audio voltage signal minus the current control voltage signal, and inputs it to the input side of the power amplifying unit. The output sound quality of the loud-speaker is improved by dynamic impedance adjustment.
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公开(公告)号：US20210351705A1
公开(公告)日：2021-11-11
申请号：US16867641
申请日：2020-05-06
Applicant: Chung-Fu Chou
Inventor： Chung-Fu Chou
Abstract: The present invention discloses a flyback power switch structure for bridgeless rectifier, comprising a main transformer, a primary side circuit, a secondary side circuit, and a feedback control circuit. Said main transformer comprises primary coil and secondary coil. Said primary side circuit is connected to the input AC power supply and the primary coil of main transformer, and is provided with a first switch component, a second switch component, a third switch component, and a fourth switch component. Said secondary side circuit is connected to the secondary coil of said main transformer, generating output voltage. Said feedback control circuit is connected to the secondary side circuit and the first, second, third and fourth switch components of primary side circuit, comparing phase signals according to the feedback signals and the first and second terminal voltages of input AC power supply to control the actuation of the first, second, third and fourth switch components. Thereby, the present invention can increase the efficiency and can be easily miniaturized.
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