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公开(公告)号：US10284144B2
公开(公告)日：2019-05-07
申请号：US15725263
申请日：2017-10-04
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hsiang-Yi Chiu
Abstract: An amplifier circuit includes an input stage, having a positive input end and a negative a negative input end, for generating a pair of differential signals according to a first input voltage received from the positive input end and a second input voltage received from a negative input end; an output stage, coupled to the input stage for generating an output voltage at an output end according to the pair of differential signals; a feedback stage, coupled between the output end and the negative input end; and a clamping unit, coupled between the positive input end and the negative input end for adjusting the second input voltage when the first input voltage is varied so as to clamp a voltage difference between the first input voltage and second input voltage.
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Patent Agency Ranking
公开(公告)号：US10152077B2
公开(公告)日：2018-12-11
申请号：US14645404
申请日：2015-03-11
Applicant: Novatek Microelectronics Corp.
Inventor： Hsiang-Yi Chiu , Lan-Shan Cheng
Abstract: A voltage generating circuit including a pre-driving unit and a voltage generating unit is provided. The pre-driving unit receives an oscillation signal and enhances a driving capability of the oscillation signal to generate a pre-driving signal. The voltage generating unit receives an input signal and the pre-driving signal, and generates an output signal according to the input signal and the pre-driving signal. The voltage generating unit generates a voltage signal according to the pre-driving signal. One of the pre-driving unit and the voltage generating unit adjusts a slew rate or a ringing component of the voltage signal by using the pre-driving signal. A pre-driving signal generating module for driving a voltage generating circuit is also provided.
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公开(公告)号：US11175318B2
公开(公告)日：2021-11-16
申请号：US16799498
申请日：2020-02-24
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Hsiang-Yi Chiu
IPC: G01R19/165 , H02H1/00
Abstract: An overcurrent detector for multiple level shifter circuits includes an overcurrent detecting circuit that senses currents acquired through level shifter circuits, and that outputs an indication signal indicating occurrence of overcurrent when one of the currents sensed thereby is greater than a predefined current level.
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公开(公告)号：US11076464B2
公开(公告)日：2021-07-27
申请号：US16562457
申请日：2019-09-06
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hsiang-Yi Chiu
Abstract: A driving circuit, for providing a driving current to a light emitting diode, includes a PWM demodulator, a current source and a local clock generator. The PWM demodulator is configured to sample a PWM input signal in reference with a local clock signal and generate a brightness code according to a duty ratio of the PWM input signal. The current source is coupled with the PWM demodulator and the light emitting diode. The current source is configured to generate the driving current with a current amplitude according to the brightness code. The local clock generator is configured to generate the local clock signal according to a global clock signal during a first cycle period of successive cycle periods of the PWM input signal. The local clock generator suspends oscillation of the local clock signal during a second cycle period of the successive cycle periods of the PWM input signal.
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公开(公告)号：US20150381034A1
公开(公告)日：2015-12-31
申请号：US14501060
申请日：2014-09-30
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hsiang-Yi Chiu
IPC: H02M3/07
Abstract: A charge pump device includes a driving stage, for generating a driving signal corresponding to a driving capability, a charge pump circuit, for generating an output voltage according to the driving signal, a comparing circuit, for generating a comparison result according to the output voltage and a reference voltage, a duty cycle detecting circuit, for detecting a length of a duty cycle of an indicating signal indicating the comparing result, to generate a detection result indicating the duty cycle, and a driving capability control circuit, coupled between the duty cycle detecting circuit and the driving stage, for controlling the driving capability corresponding to the driving signal according to the detection result.
Abstract translation: 电荷泵装置包括用于产生对应于驱动能力的驱动信号的驱动级，用于根据驱动信号产生输出电压的电荷泵电路，用于根据输出电压产生比较结果的比较电路 以及参考电压，占空比检测电路，用于检测指示比较结果的指示信号的占空比的长度，以产生指示占空比的检测结果;以及驱动能力控制电路，耦合在占空比 检测电路和驱动级，用于根据检测结果控制与驱动信号相对应的驱动能力。
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公开(公告)号：US20150355663A1
公开(公告)日：2015-12-10
申请号：US14645404
申请日：2015-03-11
Applicant: Novatek Microelectronics Corp.
Inventor： Hsiang-Yi Chiu , Lan-Shan Cheng
CPC classification number: G05F3/16 , H02M1/44 , H02M3/155 , H02M2001/0029 , H03K17/04
Abstract: A voltage generating circuit including a pre-driving unit and a voltage generating unit is provided. The pre-driving unit receives an oscillation signal and enhances a driving capability of the oscillation signal to generate a pre-driving signal. The voltage generating unit receives an input signal and the pre-driving signal, and generates an output signal according to the input signal and the pre-driving signal. The voltage generating unit generates a voltage signal according to the pre-driving signal. One of the pre-driving unit and the voltage generating unit adjusts a slew rate or a ringing component of the voltage signal by using the pre-driving signal. A pre-driving signal generating module for driving a voltage generating circuit is also provided.
Abstract translation: 提供包括预驱动单元和电压产生单元的电压产生电路。 预驱动单元接收振荡信号并增强振荡信号的驱动能力以产生预驱动信号。 电压产生单元接收输入信号和预驱动信号，并根据输入信号和预驱动信号产生输出信号。 电压产生单元根据预驱动信号产生电压信号。 预驱动单元和电压产生单元之一通过使用预驱动信号来调整电压信号的转换速率或振铃分量。 还提供了用于驱动电压产生电路的预驱动信号产生模块。
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