公开(公告)号：KR1020010057036A

公开(公告)日：2001-07-04

申请号：KR1019990058777

申请日：1999-12-17

Applicant: 한국과학기술원

Inventor： 조규형 ,  황종태 ,  정상화

IPC: H03L7/083

Abstract: PURPOSE: A loop filter using differential charge pump is provided to operate stability system to deal with deterioration of parts, change of temperature, change of process by changing current of the differential charge pump. CONSTITUTION: A charge pump(120) offers or absorbs fixed current on charge, receiving up/down signals from phase comparator(110) comparing phase of digital frequency. A loop filter(130) passes frequency of specific band, connecting with the charge pump. A main charge pump(121) offers or absorbs current according to up/down signal of phase comparator(110). A sub-charge pump(122) releases or absorbs current, approving up/down signal as opposite of the case of the main charge pump(121), receiving up/down signal of phase comparator thru invertor. The loop filter(130) is connected with resister and the first capacitor in series, and the output-terminal of the main charge pump(121) is connected with one terminal of resister, and an output-terminal of the sub-charge pump is connected with resister and common node of the first capacitor.

Abstract translation: 目的：提供使用差分电荷泵的环路滤波器来操作稳定系统，以处理零件的劣化，温度变化，通过改变差分电荷泵的电流来改变工艺。 构成：电荷泵（120）提供或吸收固定电流，从相位比较器（110）接收数字频率相位的上/下信号。 环路滤波器（130）通过与电荷泵连接的特定频带的频率。 主电荷泵（121）根据相位比较器（110）的上/下信号提供或吸收电流。 副电荷泵（122）与主电荷泵（121）的情况相反地释放或吸收电流，批准的上/下信号，通过逆变器接收相位比较器的上/下信号。 环路滤波器（130）与电阻器和第一电容器串联连接，主电荷泵（121）的输出端子与电阻器的一个端子相连，副电荷泵的输出端子是 与第一电容器的电阻和公共节点连接。

公开(公告)号：KR100289983B1

公开(公告)日：2001-05-15

申请号：KR1019990006207

申请日：1999-02-25

Applicant: 한국과학기술원

Inventor： 조규형 ,  정상화

IPC: H02M3/04

Abstract: 본발명은뱅뱅(Bang-Bang)제어직류-직류변환기에관한것으로서, 특히스위칭주파수를자유롭게제어할수 있도록한 PLL을이용한일정주파수동작의뱅뱅제어직류-직류변환기에관한것이다. 종래의 PWM제어방식에서는발진기인삼각파발생기의주파수가전체의스위칭주파수를결정하도록되어있어스위칭주파수결정에있어서는상당한간편하지만출력단 L, C 필터(Fiter) 값에따라서오차증폭기(Error Amp)에보상회로를부가하여야하고, 또한보상회로는그때그때의필터값에따라서칩 외부에서달아주어야하는데이것은원 칩(One Chip) 직류-직류변환기에는적합하지않다. 한편뱅뱅제어구조는 PWM제어방식과달리보상회로가필요없지만스위칭주파수를자유롭게제어하기가상당히어렵고, 보통의경우스위칭주파수가낮게결정되어출력전압의리플이큰 단점이있다. 이에, 본발명은뱅뱅제어구조의스위칭주파수를 PLL을이용하여원하는주파수에서일정하게제어할수 있도록하여, 상기한 PWM제어방식과뱅뱅제어구조의장점을취하는한편단점을해소함으로써 PWM과같은기능을가지면서도보상회로가필요없어직접회로화에적합하며간단하게이용할수 있으며, 특히초소형원 칩직류-직류변환기에가장적합한것이다.

公开(公告)号：KR100341622B1

公开(公告)日：2002-06-22

申请号：KR1019990058777

申请日：1999-12-17

Applicant: 한국과학기술원

Inventor： 조규형 ,  황종태 ,  정상화

IPC: H03L7/083

Abstract: 본발명은차동차지펌프의전류를가변함으로써영점을조정하고시스템의주파수대역폭을가변할수 있도록구조를개선한차동차지펌프를이용한위상동기루프(Phase Locked Loop : PLL)의필터부에관한것으로서, 디지털주파수의위상을비교하는위상비교기에출력되는업/다운(UP/DOWN) 신호를받아서부하에일정한전류를공급하거나흡수하는차지펌프(charge pump)와, 상기차지펌프에연결되어특정대역의주파수를통과시키는루프필터를포함하되; 상기차지펌프는위상비교기의업/다운신호입력에따라서 I1 만큼의전류를부하에공급하거나흡수하는주 차지펌프와, 상기위상비교기의업/다운신호를인버터를통해입력받아주 차지펌프와반대로업/다운신호가인가되었을때 전류를흡수하거나방출하는보조차지펌프를구비하고; 상기루프필터는저항과제1 커패시터가직렬로연결되어이루어지되, 상기주 차지펌프의출력단에저항의일단이연결되고, 보조차지펌프의출력단은저항과제1 커패시터의공통노드에연결된것을특징으로한다.

公开(公告)号：KR1020000056675A

公开(公告)日：2000-09-15

申请号：KR1019990006207

申请日：1999-02-25

Applicant: 한국과학기술원

Inventor： 조규형 ,  정상화

IPC: H02M3/04

Abstract: PURPOSE: A DC-DC converter is provided to control a switching frequency uniformly with a wanted range and integrate a circuit by eliminating a compensating circuit. CONSTITUTION: A DC-DC converter comprises a switching power source section which supplies a power source, a switching means for interrupting an input power source, and a feedback means for feedback an output voltage to a controlling terminal of the switching means. The feedback means comprises a differentiating device, which differentiates the output voltage ripple to variate, the switching frequency, an AC amplifier, and an input comparator. The inputs of the input comparator are an AC substance of the output voltage, a standard voltage, and the output of the AC amplifier.

Abstract translation: 目的：提供一个DC-DC转换器，用于以所需范围均匀地控制开关频率，并通过消除补偿电路来集成电路。 构成：DC-DC转换器包括提供电源的开关电源部分，用于中断输入电源的开关装置和用于将输出电压反馈到开关装置的控制端的反馈装置。 反馈装置包括微分器件，其将输出电压纹波与变化的差分，开关频率，AC放大器和输入比较器进行区分。 输入比较器的输入是输出电压，标准电压和AC放大器的输出的AC物质。