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公开(公告)号：KR100021259B1
公开(公告)日：1986-06-10
申请号：KR1019830003451
申请日：1983-07-26
Applicant: 한국과학기술연구원
IPC: H01L51/05 , H01L29/66 , H01L27/105 , H01L29/768
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公开(公告)号：KR1019900000119B1
公开(公告)日：1990-01-20
申请号：KR1019870007170
申请日：1987-07-06
Applicant: 한국과학기술연구원
Abstract: The method for eliminating the harmonics and for controlling output voltage modulates the pulse width of the switching function. A sinusoidal signal is biased so that the mininum value becomes zero for solving the constrained condition caused by pulse width modulation. A triangular wave is modulated so that one pulse is obtained at every 30 ↿ during the half period of the switching function. A pulse that will be generated between 90 ↿ and 120 ↿ is generated near 90 ↿, and a pulse that will be generated between 120↿ and 150 ↿ is generated near 120 ↿. No pulse is generated between 150↿ and 180 ↿.
Abstract translation: 消除谐波和控制输出电压的方法调制开关功能的脉冲宽度。 正弦信号被偏置，使得最小值变为零，以解决由脉宽调制引起的约束条件。 调制三角波，使得在切换功能的半周期内每30 is获得一个脉冲。 在90↿附近会产生在90↿和120 be之间产生的脉冲，在120 generated附近会产生在120↿和150 be之间产生的脉冲。 150？180？之间不产生脉冲。
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Patent Agency Ranking
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公开(公告)号：KR1019880000895B1
公开(公告)日：1988-05-30
申请号：KR1019850003848
申请日：1985-06-03
Applicant: 한국과학기술연구원
Abstract: This invention relates to a focusing method of ultrasound imaging signal in ultrasound imaging system. This new focusing method can perform the continuous dynamic focusing by eliminating the analog delay device and also has excellent resolution and simple structure. In the method for focusing the ultrasound imaging signal, the ultrasound signal which is reflected from the object is converted into electrical signal in the array transducer formed of N transducing devices. The differences of delayed time among the ultrasound signals are compensated by the sampling-delay method. The time dealys occur due to the difference among the array position of transducing devices.
Abstract translation: 本发明涉及超声成像系统中的超声成像信号的聚焦方法。 这种新的聚焦方法可以通过消除模拟延迟器件进行连续动态聚焦，并且具有优异的分辨率和简单的结构。 在用于聚焦超声成像信号的方法中，将从物体反射的超声信号转换成由N个换能装置形成的阵列换能器中的电信号。 超声信号之间延迟时间的差异由采样延迟法补偿。 由于换能装置的阵列位置之间的差异，发生时间变化。
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