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31.发明授权Digitally programmable apparatus for generating a substantially linear ramp signal 失效用于产生基本线性斜坡信号的数字可编程装置
公开(公告)号：US4238727A
公开(公告)日：1980-12-09
申请号：US972459
申请日：1978-12-22
申请人： Asad M. Madni
发明人： Asad M. Madni
摘要： A digitally programmable ramp generator produces a substantially linear ramp along with an equivalent digital code by use of a multiplying digital to analog converter which drives an integrator which produces a ramp voltage. This ramp voltage is compared in a feedback circuit with a stairstep ramp (produced by another DAC driven by a counter) and the summed signal is coupled to the reference input of the multiplying DAC so that if there is a difference between the stairstep and the analog ramp the first converter will tend to catch up to the stairstep ramp. Such stairstep ramp is incremented by a comparator which senses when the reference voltage to the multiplying DAC approaches zero; each time this occurs there is an incrementing of the counter. Thus, the digital counter value is equivalent to the value of the analog ramp at any point in time.
摘要翻译： 数字可编程斜坡发生器通过使用驱动产生斜坡电压的积分器的乘法数模转换器与等效数字代码产生基本上线性的斜坡。 该斜坡电压在反馈电路中与步进斜坡（由由计数器驱动的另一DAC产生）相加，并且相加的信号耦合到乘法DAC的参考输入，使得如果在步态和模拟之间存在差异 倾斜的第一个转换器将倾向于赶上直升机。 这样的阶梯斜坡由比较器增加，该比较器检测乘法DAC的参考电压何时接近零; 每次发生这种情况时，都会增加计数器。 因此，数字计数器值等同于任何时间点的模拟斜坡的值。
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32.发明授权System for generating a multiplicity of frequencies from a single reference frequency 失效从单一参考频率产生频率的多项式的系统
公开(公告)号：US3831015A
公开(公告)日：1974-08-20
申请号：US26105472
申请日：1972-06-08
申请人： INTEL CORP
发明人： HOFF M
摘要： A digital system which enables the generation of frequencies, including frequencies which are not submultiples of a reference frequency is disclosed. A predetermined number K is periodically added at the rate of fc to the contents of an N bit register which is permitted to overflow when its content exceeds its capacity. Any frequency equal to Kfc/2N may be generated by the system.
摘要翻译： 公开了能够产生频率的数字系统，包括不是参考频率的分数的频率。 以fc的速率周期性地将预定数量K添加到当其内容超过其容量时允许溢出的N位寄存器的内容。 可以由系统产生等于Kf c / 2N的任何频率。
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公开(公告)号：US1793406A
公开(公告)日：1931-02-17
申请号：US39603029
申请日：1929-09-30
申请人： GEN ELECTRIC
发明人： KELL RAY D
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公开(公告)号：US11824545B2
公开(公告)日：2023-11-21
申请号：US17831559
申请日：2022-06-03
发明人： Hyunseok Nam
CPC分类号： H03K5/1565 , H02M3/00 , H03K3/017 , H03K4/08
摘要： A duty point detection circuit receiving an input signal and generating an output signal includes a charge pump receiving the input signal and the output signal and generating a comparison target signal from the input signal and the output signal, a magnitude of the comparison target signal being determined based on a first duty ratio of the input signal and a second duty ratio of the output signal, a comparator receiving a reference signal and the comparison target signal, and comparing the reference signal and the comparison target signal to generate a comparison result signal, and a control circuit receiving the input signal and the comparison result signal and adjusting the second duty ratio of the output signal to a constant duty ratio in successive cycle periods of the input signal.
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公开(公告)号：US11764767B1
公开(公告)日：2023-09-19
申请号：US18145525
申请日：2022-12-22
发明人： Chuansong Pang
IPC分类号： H03K4/08
CPC分类号： H03K4/08
摘要： A controller includes a ramp circuit and control logic. The ramp circuit includes: ramp generation circuitry having a first control input and a first current output; ramp adjustment circuitry having a second control input and a second current output; current scaling circuitry having a first current input, a current sense output and an offset current output, the first current input coupled to the first and second current outputs; and ramp completion circuitry having a current sense input and a completion output, the current sense input coupled to the current sense output. The control logic has a third control input and first and second control outputs. The third control input is coupled to the completion output. The first control output is coupled to the first control input. The second control output is coupled to the second control input.
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公开(公告)号：US20180351452A1
公开(公告)日：2018-12-06
申请号：US15614799
申请日：2017-06-06
发明人： Danny Clavette , Kang Peng , Keng Chen , Mark A. Crowther
CPC分类号： H02M3/156 , H02M1/084 , H02M3/158 , H02M3/1588 , H02M2001/0025 , H02M2003/1586 , H03K4/08
摘要： A power supply includes a reference voltage generator circuit, a ramp generator circuit, and control circuitry. During operation, the reference voltage generator circuit compares a magnitude of a received output voltage feedback signal to a received reference voltage. Based on the comparison, the reference voltage generator circuit produces a varying reference voltage and outputs it to the ramp generator circuit. As its name suggests, a magnitude of the varying reference voltage varies over time. The ramp generator circuit produces a ramp voltage signal, a magnitude of which is offset by the varying reference voltage. To maintain an output voltage of the power supply within regulation, the control circuitry receives the varying reference voltage and controls activation of a power converter circuit to power a load based on a comparison of the ramp voltage signal and the output voltage feedback signal of the power supply.
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公开(公告)号：US20180013385A1
公开(公告)日：2018-01-11
申请号：US15632076
申请日：2017-06-23
发明人： Yungtaek Jang , Yin-Yuan Chen , Sheng-Hua Li
CPC分类号： H03B5/04 , G05F1/70 , H03B5/02 , H03B5/1847 , H03B2200/003 , H03K3/00 , H03K4/06 , H03K4/08 , H03K7/02 , H03K7/06
摘要： A microwave generator includes a power supply, an output circuit, a feedback oscillator, a pulse controller, a signal combination circuit and a semiconductor amplifier. The power supply converts input voltage and input current into output voltage and output current. The output circuit generates a microwave signal to an output terminal of the microwave generator and a feedback signal according to the microwave signal. The feedback oscillator generates an oscillation signal according to the feedback signal. According to a reference signal, the pulse controller generates a pulse signal. According to the oscillation signal and pulse signal, the signal combination circuit generates a control signal. The semiconductor amplifier generates and adjusts an amplified signal according to the control signal. The output circuit generates the microwave signal according to the amplified signal. The output current is adjusted according to the amplified signal. Consequently, the input current and the input voltage are in phase.
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39.发明授权公开(公告)号：US09755624B2
公开(公告)日：2017-09-05
申请号：US14429516
申请日：2014-04-28
发明人： Liye Duan , Lirong Wang , Zhongyuan Wu
CPC分类号： H03K4/06 , G09G3/20 , G09G5/20 , G09G2300/0408 , G09G2310/0259 , G09G2310/066 , H03K4/08
摘要： A ramp signal generating circuit and ramp signal generator, an array substrate and a display apparatus. The ramp signal generating circuit comprises a first shift register (11), a second shift register (12), a voltage decreasing unit (13) and a sampling unit (14); the voltage decreasing unit (13) is connected to a first power supply input terminal, a second power supply input terminal and a ground terminal and is configured to continuously decrease a voltage inputted from the first power supply input terminal and a voltage inputted from the second power supply input terminal stage by stage; the first shift register (11) is connected to the voltage decreasing unit (13) and is configured to control the voltage decreasing unit (13) to output voltages which are decreased continuously stage by stage; the sampling unit (14) has an output terminal and is connected to the voltage decreasing unit (13); the second shift register (12) is connected to the sampling unit (14) and is configured to control the sampling unit (14) to sample and output the voltages which are decreased continuously stage by stage and outputted by the voltage decreasing unit (13). Such ramp signal generating circuit is capable of reducing area of the ramp signal generating circuit and improving linearity of ramp signal.
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公开(公告)号：US09584102B2
公开(公告)日：2017-02-28
申请号：US14560371
申请日：2014-12-04
申请人： CISTA SYSTEM CORP.
发明人： Dennis Tunglin Lee , Guangbin Zhang
CPC分类号： H04N5/3765 , H03K4/02 , H03K4/08 , H03K4/12 , H03K4/26 , H03K4/48 , H04N5/3655 , H04N5/3658 , H04N5/378
摘要： A system is provided for generating a ramping signal. The system includes a plurality of storage circuits each including an input and an output. The output of a previous storage circuit is connected to the input of a next storage circuit. The storage circuits are configured to propagate a first enable signal based on a first control signal. The system also includes a plurality of first current generating circuits. Each first current generating circuit is coupled to the output of a corresponding storage circuit to receive the propagated first enable signal. The first current generating circuits are configured to generate a first current signal based on the propagated first enable signal.
摘要翻译： 提供了一种用于产生斜坡信号的系统。 该系统包括多个存储电路，每个存储电路包括输入和输出。 先前存储电路的输出连接到下一个存储电路的输入端。 存储电路被配置为基于第一控制信号传播第一使能信号。 该系统还包括多个第一电流产生电路。 每个第一电流产生电路耦合到相应的存储电路的输出，以接收传播的第一使能信号。 第一电流产生电路被配置为基于传播的第一使能信号产生第一电流信号。
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