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1.发明申请公开(公告)号：US20150171843A1
公开(公告)日：2015-06-18
申请号：US14635507
申请日：2015-03-02
发明人： Chang Min Kim
摘要： A pulse width modulation (PWM) signal generation circuit and method are disclosed herein. The PWM signal generation circuit includes an integer part pulse generation circuit, and a fractional part pulse generation circuit. The integer part pulse generation circuit generates an integer part pulse using the integer part of the digitized value of a duty cycle, i.e., the ratio of the time during which any one of high and low levels is maintained to the period of a PWM signal. The fractional part pulse generation circuit generates the PWM signal using the integer part pulse and the fractional part of the digitized value of the duty cycle.
摘要翻译： 本文公开了脉宽调制（PWM）信号产生电路和方法。 PWM信号生成电路包括整数部脉冲发生电路和分数部脉冲发生电路。 整数部分脉冲产生电路使用占空比的数字化值的整数部分即保持高电平和低电平之间的时间与PWM信号的周期的比率来生成整数部分脉冲。 分数脉冲发生电路使用整数部分脉冲和占空比数字化值的小数部分产生PWM信号。
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公开(公告)号：US20160036237A1
公开(公告)日：2016-02-04
申请号：US14815628
申请日：2015-07-31
发明人： Chang Min Kim
IPC分类号： H02J4/00
CPC分类号： H05B33/0815 , H05B33/0827 , Y02B20/347
摘要： A multi-channel current control circuit and method are disclosed herein. The multi-channel current control includes an operational amplifier provided for a channel; a low pass filter provided for the channel connected to an input terminal of the operational amplifier; a mode control circuit configured to control the low pass filter to have one of predetermined time constants in accordance with predetermined current control mode; and a pulse width modulation circuit configured to generate a pulse width modulation signal provided for the channel; and transfer the pulse width modulation signal to the input terminal of the operational amplifier via the low pass filter. The operational amplifier controls a load current of the channel using an output voltage of the operational amplifier.
摘要翻译： 本文公开了一种多通道电流控制电路和方法。 多通道电流控制包括为通道提供的运算放大器; 提供用于连接到运算放大器的输入端的通道的低通滤波器; 模式控制电路，被配置为根据预定电流控制模式控制所述低通滤波器具有预定时间常数之一; 以及脉冲宽度调制电路，被配置为产生为所述通道提供的脉冲宽度调制信号; 并通过低通滤波器将脉宽调制信号传送到运算放大器的输入端。 运算放大器使用运算放大器的输出电压来控制通道的负载电流。
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公开(公告)号：US10104725B2
公开(公告)日：2018-10-16
申请号：US14815628
申请日：2015-07-31
发明人： Chang Min Kim
摘要： A multi-channel current control circuit and method are disclosed herein. The multi-channel current control includes an operational amplifier provided for a channel; a low pass filter provided for the channel connected to an input terminal of the operational amplifier; a mode control circuit configured to control the low pass filter to have one of predetermined time constants in accordance with predetermined current control mode; and a pulse width modulation circuit configured to generate a pulse width modulation signal provided for the channel; and transfer the pulse width modulation signal to the input terminal of the operational amplifier via the low pass filter. The operational amplifier controls a load current of the channel using an output voltage of the operational amplifier.
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4.发明授权公开(公告)号：US09344072B2
公开(公告)日：2016-05-17
申请号：US14635507
申请日：2015-03-02
发明人： Chang Min Kim
摘要： A pulse width modulation (PWM) signal generation circuit and method are disclosed herein. The PWM signal generation circuit includes an integer part pulse generation circuit, and a fractional part pulse generation circuit. The integer part pulse generation circuit generates an integer part pulse using the integer part of the digitized value of a duty cycle, i.e., the ratio of the time during which any one of high and low levels is maintained to the period of a PWM signal. The fractional part pulse generation circuit generates the PWM signal using the integer part pulse and the fractional part of the digitized value of the duty cycle.
摘要翻译： 本文公开了脉宽调制（PWM）信号产生电路和方法。 PWM信号生成电路包括整数部脉冲发生电路和分数部脉冲发生电路。 整数部分脉冲产生电路使用占空比的数字化值的整数部分即保持高电平和低电平之间的时间与PWM信号的周期的比率来生成整数部分脉冲。 分数脉冲发生电路使用整数部分脉冲和占空比数字化值的小数部分产生PWM信号。
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