-
公开(公告)号：US6060933A
公开(公告)日：2000-05-09
申请号：US112038
申请日：1998-07-08
申请人： Edward P. Jordan , Royal A. Gosser
发明人： Edward P. Jordan , Royal A. Gosser
CPC分类号： H03G1/0088
摘要： An electronic vernier realizes programmable gain steps with first and second impedance ladders, a plurality of activatable coupling networks and a switch network. The ladders receive and progressively process the differential input signal into a plurality of progressive differential signals. In an embodiment, the coupling networks each generate a respective one of a plurality of progressive differential output signals in response to a respective one of the progressive differential signals and the switch network activates any selected one of the coupling networks. Thus, any selected vernier step is obtained by activating the respective coupling network. The verniers can be integrated into various systems, e.g., programmable amplifiers.
摘要翻译： 电子游标器通过第一和第二阻抗梯子，多个可激活耦合网络和交换网络实现可编程增益步长。 梯子接收并逐渐处理差分输入信号为多个渐进差分信号。 在一个实施例中，耦合网络响应于相应的渐进差分信号之一而产生多个逐行差分输出信号中的相应一个，并且交换网络激活耦合网络中的任何一个。 因此，通过激活相应的耦合网络来获得任何选择的游标步骤。 游标可以集成到各种系统中，例如可编程放大器。
-
公开(公告)号：US5295158A
公开(公告)日：1994-03-15
申请号：US889821
申请日：1992-05-29
申请人： Edward P. Jordan
发明人： Edward P. Jordan
CPC分类号： H04J3/1676 , H03K7/08 , H04L25/4902
摘要： A dynamically selectable multimode pulse width modulation system includes ramp generator means for generating a ramp; pulse edge modulation means responsive to the ramp generator means for defining a leading edge modulated pulse, a trailing edge modulated pulse and a dual edge modulated pulse; and mode selection means responsive to the pulse edge modulation means for selecting one of the leading edge modulation, trailing edge modulation, and dual edge modulation modes of pulse width modulation.
摘要翻译： 一种动态选择的多模式脉宽调制系统，包括用于产生斜坡的斜坡发生器装置; 脉冲边缘调制装置响应于用于定义前沿调制脉冲，后沿调制脉冲和双边缘调制脉冲的斜坡发生器装置; 以及模式选择装置，其响应脉冲边缘调制装置，用于选择脉冲宽度调制的前沿调制，后沿调制和双边缘调制模式之一。
-
公开(公告)号：US5283515A
公开(公告)日：1994-02-01
申请号：US890950
申请日：1992-05-29
申请人： Edward P. Jordan
发明人： Edward P. Jordan
IPC分类号： G01R31/316 , G01R19/165 , H03K3/0231 , H03K4/08 , H03K4/502
CPC分类号： H03K3/0231 , H03K4/502
摘要： An automatic calibration for a ramp voltage generator includes a ramp voltage generator circuit responsive to a clock signal for providing a ramp voltage during a ramp voltage period; a comparator responsive to the ramp voltage for indicating whether the ramp voltage has reached a predetermined reference voltage level in the ramp voltage period; and a ramp rate control circuit responsive to the comparator for adjusting the ramp voltage generator circuit to drive the ramp voltage to obtain the predetermined reference voltage level in the ramp voltage period.
摘要翻译： 斜坡电压发生器的自动校准包括斜坡电压发生器电路，其响应于在斜坡电压周期期间提供斜坡电压的时钟信号; 响应于所述斜坡电压的比较器，用于指示所述斜坡电压是否在所述斜坡电压周期内达到预定参考电压电平; 以及斜坡率控制电路，其响应于比较器，用于调整斜坡电压发生器电路以驱动斜坡电压，以在斜坡电压周期内获得预定的参考电压电平。
-
公开(公告)号：US5574392A
公开(公告)日：1996-11-12
申请号：US428374
申请日：1995-04-25
申请人： Edward P. Jordan
发明人： Edward P. Jordan
CPC分类号： H03K4/48
摘要： An asymmetrical ramp generator system for a pulse width modulator includes a complementary clock circuit; a first symmetrical dual ramp generator, responsive to the clock circuit, for generating first and second ramps having a predetermined voltage range and extending for a period equal to or greater than one half the clock cycle; a comparator device, responsive to the first and second symmetrical ramps and to a reference level within the predetermined voltage range of the first and second ramps, for generating corresponding dual first and second asymmetrical drive signals; and a second asymmetrical dual ramp generator, responsive to the first and second asymmetrical drive signals, for generating third and fourth asymmetrical overlapping ramps which extend beyond the predetermined voltage range.
摘要翻译： 用于脉冲宽度调制器的不对称斜坡发生器系统包括互补时钟电路; 响应于时钟电路的第一对称双斜坡发生器，用于产生具有预定电压范围并延伸等于或大于时钟周期的一半的周期的第一和第二斜坡; 比较器装置，响应于第一和第二对称斜坡，并且在第一和第二斜坡的预定电压范围内的参考电平，用于产生相应的双重第一和第二不对称驱动信号; 以及响应于第一和第二不对称驱动信号的第二不对称双斜坡发生器，用于产生延伸超过预定电压范围的第三和第四不对称重叠斜坡。
-
公开(公告)号：US5208559A
公开(公告)日：1993-05-04
申请号：US890948
申请日：1992-05-29
申请人： Edward P. Jordan
发明人： Edward P. Jordan
摘要： A pulse shaping system for a pulse width modulation system includes: a ramp generator for generating a ramp signal having a ramp portion and a rest portion; a latch signal generator providing a latch signal coincident with the ramp portion; an indicator circuit for indicating desired pulse width; a pulse edge modulator responsive to the ramp portion and to the indicator circuit for providing a pulse width modulated pulse having at least one of its edges modulated; and including one or both of a fill circuit and a blanking circuit. In response to an indication from the indicator circuit of a desired maximum pulse width, the fill circuit causes the latch signal and the pulse generated by the pulse edge modulator to be combined for producing a maximum width pulse at the full width of the latch signal and the ramp portion. In response to an indication from the indicator circuit of a desired zero pulse width, the blanking circuit causes inhibiting of the pulse generated by the pulse edge modulator during the period of the latch signal and the ramp portion, for producing a zero width pulse during the full period of the latch signal and coincident ramp portion.
摘要翻译： 一种用于脉冲宽度调制系统的脉冲整形系统包括：斜坡发生器，用于产生具有斜坡部分和休息部分的斜坡信号; 提供与斜坡部分重合的锁存信号的锁存信号发生器; 用于指示所需脉冲宽度的指示电路; 响应于所述斜坡部分的脉冲边缘调制器和所述指示器电路，用于提供脉冲宽度调制脉冲，所述脉冲宽度调制脉冲的至少一个边沿被调制; 并且包括填充电路和消隐电路中的一个或两个。 响应于来自指示器电路的期望的最大脉冲宽度的指示，填充电路使得锁存信号和由脉冲边缘调制器产生的脉冲被组合以产生锁存信号的全宽度处的最大宽度脉冲，以及 斜坡部分。 响应于来自指示器电路的所需零脉冲宽度的指示，消隐电路在闩锁信号和斜坡部分的周期期间导致抑制由脉冲边缘调制器产生的脉冲，以在该期间产生零宽度脉冲 锁定信号和重合斜坡部分的整个周期。
-
公开(公告)号：US5537027A
公开(公告)日：1996-07-16
申请号：US428903
申请日：1995-04-25
申请人： Edward P. Jordan
发明人： Edward P. Jordan
摘要： A calibration system for an asymmetrical ramp generator system for a pulse width modulator wherein a current splitting circuit establishes a slew rate and a calibration level for the first ramp that is the same as the slew rate and the usable voltage range of the second ramp and wherein the first and second sets of ramps are matched so that calibration of the first set results in simultaneous calibration of the second set.
摘要翻译： 一种用于脉冲宽度调制器的不对称斜坡发生器系统的校准系统，其中电流分离电路建立与第二斜坡的转换速率和可用电压范围相同的第一斜坡的转换速率和校准电平，其中 第一组和第二组斜坡匹配，使得第一组的校准导致第二组的同时校准。
-
公开(公告)号：US5317199A
公开(公告)日：1994-05-31
申请号：US37701
申请日：1993-03-25
申请人： Edward P. Jordan
发明人： Edward P. Jordan
CPC分类号： H03K4/50
摘要： An improved ramp generator system includes a plurality of ramp generator circuits; a ramp rate signal source for controlling the ramp slope; a ramp voltage signal source for establishing the starting voltage of the ramp; a ramp starting signal source for starting the ramp; a device for defining a plurality of ramp periods; and a switching device, responsive to the device for defining the ramp periods, for alternately, sequentially connecting the ramp rate signal source, ramp voltage signal source, and ramp starting signal source, to each of the ramp generator circuits for producing a series of identical ramps.
摘要翻译： 改进的斜坡发生器系统包括多个斜坡发生器电路; 用于控制斜坡斜坡的斜坡率信号源; 斜坡电压信号源，用于建立斜坡的起始电压; 启动斜坡的斜坡启动信号源; 用于定义多个斜坡周期的装置; 以及开关装置，响应于用于限定斜坡周期的装置，用于交替地将斜坡率信号源，斜坡电压信号源和斜坡起始信号源顺序地连接到每个斜坡发生器电路，以产生一系列相同的 坡道
-
公开(公告)号：US5198785A
公开(公告)日：1993-03-30
申请号：US890949
申请日：1992-05-29
申请人： Edward P. Jordan
发明人： Edward P. Jordan
CPC分类号： H03K7/08
摘要： A dual edge pulse width modulation system includes a ramp generator for generating a voltage ramp; an n bit digital to analog converter having a normal and an inverted output for establishing a leading edge and a trailing edge reference; a comparator responsive to the ramp and the leading edge and trailing edge references, respectively, for defining the leading edge and the trailing edge of a pulse; and a pulse generator for producing a pulse having the width determined by the defined leading and trailing edges.
摘要翻译： 双边缘脉冲宽度调制系统包括用于产生电压斜坡的斜坡发生器; 具有用于建立前沿和后沿参考的正常和反相输出的n位数模转换器; 分别响应于斜坡和前沿和后沿参考的比较器，用于限定脉冲的前沿和后沿; 以及用于产生具有由限定的前缘和后缘确定的宽度的脉冲的脉冲发生器。
-
公开(公告)号：US5192922A
公开(公告)日：1993-03-09
申请号：US890951
申请日：1992-05-29
申请人： Edward P. Jordan
发明人： Edward P. Jordan
IPC分类号： H03K7/08
CPC分类号： H03K7/08
摘要： An anti-false triggering system for a pulse width modulation system includes a ramp generator for generating a ramp signal having a ramp portion and a rest portion; a latch enable signal generator for providing a latch enable signal only during the ramp portion of the ramp signal; and a pulse edge modulator responsive to the ramp portion of the ramp signal for providing a pulse with at least one of its edges modulated, the pulse edge modulator being enabled by the latch enable signal only during the ramp portion of the ramp signal for suppressing false triggering of the pulse edge modulator during the rest portion of the ramp signal.
摘要翻译： 用于脉宽调制系统的防误触发系统包括用于产生具有斜坡部分和休息部分的斜坡信号的斜坡发生器; 锁存使能信号发生器，仅在斜坡信号的斜坡部分提供锁存使能信号; 以及响应于斜坡信号的斜坡部分的脉冲边沿调制器，用于提供其边缘中的至少一个边缘被调制的脉冲，脉冲边沿调制器仅在斜坡信号的斜坡部分中被锁存使能信号使能，以抑制错误 在斜坡信号的其余部分触发脉冲边缘调制器。
-
公开(公告)号：US4018673A
公开(公告)日：1977-04-19
申请号：US662135
申请日：1976-02-27
CPC分类号： B03B5/32
摘要： Method of removing coarse materials and chemical and mineral impurities from clay in order to produce a purified high solids suspension of said clay which method involves mixing a crude clay with water and a dispersing agent to form a high solids slurry; subjecting said slurry to intense centrifugal forces for a short period of time; separating said coarse material and said chemical and mineral impurities; and recovering the suspended clay as a fine fraction having a reduced content of coarse material and impurities.
摘要翻译： 从粘土中除去粗物质和化学和矿物杂质以便产生所述粘土的纯化高固体悬浮液的方法，该方法包括将粗粘土与水和分散剂混合以形成高固体浆料; 在短时间内对所述浆料进行强烈的离心力; 分离所述粗物质和所述化学和矿物杂质; 并将悬浮的粘土作为粗品和杂质含量低的精细馏分进行回收。
-
-
-
-
-
-
-
-
-
搜索结果
10 条记录 (耗时 0.011 秒)
