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公开(公告)号：US12095366B2
公开(公告)日：2024-09-17
申请号：US17654290
申请日：2022-03-10
发明人： Jan Plojhar
CPC分类号： H02M3/156 , H02M1/0025 , H02M1/08 , H03K3/037 , H03K4/08
摘要： According to an aspect, a controller includes an error circuit configured to receive a clamping voltage and a feedback signal, the error circuit configured to generate a regulation reference signal based on the clamping voltage and the feedback signal, a PWM circuit configured to receive the regulation reference signal and a current sense signal, the PWM circuit configured to generate a limit signal or a regulation signal based on the regulation reference signal and the current sense signal, a clamp circuit configured to increase a magnitude of the clamping voltage in response to the regulation signal being an active state and decrease the magnitude of the clamping voltage in response to the limit signal being the active state, and a drive circuit configured to generate a drive signal for regulating the output current in response to at least one of the limit signal or the regulation signal.
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公开(公告)号：US11722058B2
公开(公告)日：2023-08-08
申请号：US17227435
申请日：2021-04-12
发明人： Chao-Wei Tseng , Yow-Tsyr Liang
摘要： An emulated current generation circuit of a power converting circuit, providing an emulated current includes an AC component current and a DC component current, includes a first current circuit, a second current circuit, a combination circuit and a calibration circuit. The first current circuit generates a ramp signal as the AC component current. The second current circuit is coupled to an output stage of power converting circuit to provide a sensing current. The DC component current is generated after performing a sample-and-hold processing on the sensing current. The combination circuit is coupled to the first current circuit and second current circuit respectively to combine the AC component current and DC component current into an emulated sensing current. The calibration circuit is coupled to the first current circuit, second current circuit and combination circuit to dynamically adjust the ramp signal according to the emulated sensing current and sensing current.
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公开(公告)号：US20230208403A1
公开(公告)日：2023-06-29
申请号：US17565110
申请日：2021-12-29
摘要： A system comprises a first comparator, a second comparator, a pulse-width modulation (PWM) controller, and a ramp generator. The first comparator has a positive input coupled to a first ramp output of the ramp generator and a negative input configured to receive an input voltage. The second comparator has a positive input configured to receive the input voltage and a negative input coupled to a second ramp output of the ramp generator. The PWM controller is coupled to outputs and control signal inputs of the first and second comparators and has a control output. In some implementations, the ramp generator generates a high-side falling ramp for the first comparator and a low-side rising ramp for the second comparator. In some implementations, the ramp generator includes a first ramp generator for the high-side falling ramp and a second ramp for the low-side rising ramp.
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公开(公告)号：US20180131888A1
公开(公告)日：2018-05-10
申请号：US15865326
申请日：2018-01-09
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.
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公开(公告)号：US09953203B2
公开(公告)日：2018-04-24
申请号：US15248621
申请日：2016-08-26
发明人： Songtao Chen
CPC分类号： G06K9/0002 , G06K9/38 , H03K4/08 , H03M1/56
摘要： The present disclosure, related to the technical field of fingerprint identification, discloses a ramp wave generation circuit, a digital-to-analog conversion circuit, and a fingerprint identification system. The ramp wave generation circuit comprises: an integrating circuit, configured to output a ramp wave signal; a signal regulation circuit, comprising a feedback control loop and a transconductance amplifier connected in series, wherein the feedback control loop monitors the ramp wave signal output by the integrating circuit, and outputs a regulation control signal to the transconductance amplifier, the transconductance amplifier corrects, according to the regulation control signal, a ramp wave signal output by the integrating circuit within a next period; and a voltage generation circuit, configured to respectively output a reference voltage signal to the integrating circuit and the signal regulation circuit.
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6.发明申请公开(公告)号：US20180033722A1
公开(公告)日：2018-02-01
申请号：US15662630
申请日：2017-07-28
发明人： Yunhwan JUNG , Sunyool KANG , Jaehong KIM
IPC分类号： H01L23/522 , H01L27/08
CPC分类号： H01L23/5223 , H01L23/5225 , H01L27/0805 , H03K4/08 , H04N5/3575 , H04N5/378
摘要： A comparison circuit that includes an input sampling capacitor and an image sensor including the same are provided. The comparison circuit includes an amplifier configured to receive a pixel signal and a ramp signal to perform a correlated double sampling operation, a first pixel capacitor connected to the amplifier through a first floating node and configured to transmit the pixel signal, a first ramp capacitor connected to the amplifier through a second floating node and configured to transmit the ramp signal, a second pixel capacitor connected in parallel to the first pixel capacitor, and a second ramp capacitor connected in parallel to the first ramp capacitor, wherein the second pixel capacitor is formed between the first floating node and first peripheral routing lines, and the second ramp capacitor is formed between the second floating node and second peripheral routing lines.
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公开(公告)号：US09628064B2
公开(公告)日：2017-04-18
申请号：US14917688
申请日：2014-09-01
申请人： Merus Audio ApS
CPC分类号： H03K7/08 , H02M2003/1586 , H03F3/183 , H03F3/2173 , H03F3/2178 , H03F2200/03 , H03F2200/129 , H03F2200/351 , H03K4/08 , H04R3/007
摘要： A multiphase pulse width modulator (PWM) producing N mutually phase shifted PWM signals, which is well-suited for class D audio amplifier applications. The multiphase PWM includes (a) N+1 (N ≧2) analog triangular waveform generators producing N+1 mutually phase shifted triangular waveforms, and (b) N+1 comparators each having a first input coupled to each of the N+1 triangular waveforms and a second input coupled to an audio signal to generate N+1 mutually phase shifted PWM phase signals. A crosspoint switch includes N+1 inputs coupled to the N+1 PWM phase signals, and N outputs to supply the N PWM signals. A crosspoint switch controller selectively connects each of the N+1 inputs to each of the N outputs for a duration of a cycle time in a time sequence to simultaneously generate the N PWM signals such that each signal has interleaved time segments of the N+1 PWM phase signals.
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公开(公告)号：US09473130B2
公开(公告)日：2016-10-18
申请号：US14048689
申请日：2013-10-08
申请人： NXP B.V.
CPC分类号： H03K5/22 , G06F1/02 , H02J7/0052 , H03K4/08 , H03K4/94
摘要： Various aspects of the disclosure are directed to methods and apparatuses involving providing a clock signal. As consistent with one or more embodiments herein, a sawtooth waveform signal is generated in a manner that facilitates low power operation. In some implementations, the sawtooth waveform signal is generated using an oscillator that operates without necessarily employing R-C circuits and/or without rail-to-rail voltage supply, such as via a nonlinear oscillator. The sawtooth waveform signal is used to generate a trapezoidal waveform signal, and a clock signal is generated using the trapeziodal waveform signal.
摘要翻译： 本公开的各个方面涉及涉及提供时钟信号的方法和装置。 与本文中的一个或多个实施例一致，以促进低功率操作的方式产生锯齿波形信号。 在一些实施方式中，锯齿波形信号是通过使用振荡器来产生的，所述振荡器例如通过非线性振荡器，不需要使用R-C电路和/或没有轨到轨电压供电。 锯齿波形信号用于产生梯形波形信号，并且使用梯形波形信号产生时钟信号。
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公开(公告)号：US09385694B2
公开(公告)日：2016-07-05
申请号：US13719491
申请日：2012-12-19
摘要： A circuit for generating a signal comprising a first transistor having a drain, a gate and a source. A second transistor having a drain, a source and a gate coupled to the gate of the first transistor to form a current mirror. A current source coupled to the source of the first transistor. A diode-connected transistor having a drain coupled to the source of the second transistor, a source and a gate that forms an output. A variable resistor having a first terminal coupled to the source of diode-connected transistor and a second terminal. A capacitor coupled to the second terminal of the variable resistor.
摘要翻译： 一种用于产生包括具有漏极，栅极和源极的第一晶体管的信号的电路。 第二晶体管，其具有耦合到第一晶体管的栅极的漏极，源极和栅极，以形成电流镜。 耦合到第一晶体管的源极的电流源。 二极管连接的晶体管，其具有耦合到第二晶体管的源极的漏极，源极和栅极，其形成输出。 一种可变电阻器，其具有耦合到二极管连接晶体管源极的第一端子和第二端子。 耦合到可变电阻器的第二端子的电容器。
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公开(公告)号：US20150097516A1
公开(公告)日：2015-04-09
申请号：US14048689
申请日：2013-10-08
申请人： NXP B.V.
CPC分类号： H03K5/22 , G06F1/02 , H02J7/0052 , H03K4/08 , H03K4/94
摘要： Various aspects of the disclosure are directed to methods and apparatuses involving providing a clock signal. As consistent with one or more embodiments herein, a sawtooth waveform signal is generated in a manner that facilitates low power operation. In some implementations, the sawtooth waveform signal is generated using an oscillator that operates without necessarily employing R-C circuits and/or without rail-to-rail voltage supply, such as via a nonlinear oscillator. The sawtooth waveform signal is used to generate a trapezoidal waveform signal, and a clock signal is generated using the trapeziodal waveform signal.
摘要翻译： 本公开的各个方面涉及涉及提供时钟信号的方法和装置。 与本文中的一个或多个实施例一致，以促进低功率操作的方式产生锯齿波形信号。 在一些实施方式中，锯齿波形信号是通过使用振荡器来产生的，所述振荡器例如通过非线性振荡器，不需要使用R-C电路和/或没有轨到轨电压供电。 锯齿波形信号用于产生梯形波形信号，并且使用梯形波形信号产生时钟信号。
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