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公开(公告)号：US20200212843A1
公开(公告)日：2020-07-02
申请号：US16681771
申请日：2019-11-12
申请人： MEDIATEK INC.
发明人： Yu-Li Hsueh , Po-Chun Huang , Ang-Sheng Lin , Wei-Hao Chiu
IPC分类号： H03B5/12
摘要： A voltage controlled oscillator includes a first inductor, a second inductor, a first metal oxide semiconductor (MOS) transistor, a second MOS transistor, and an inductor-capacitor (LC) tank circuit. A first end of the first inductor and a first end of the second inductor are coupled to a first power rail. A drain node of the first MOS transistor is coupled to a second end of the first inductor. A drain node of the second MOS transistor is coupled to a second end of the second inductor. Source nodes of the first MOS transistor and the second MOS transistor are coupled to a second power rail. The LC tank circuit is coupled to gate nodes of the first MOS transistor and the second MOS transistor, wherein energy is magnetically pumped into the LC tank circuit through the first inductor and the second inductor.
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公开(公告)号：US20170111009A1
公开(公告)日：2017-04-20
申请号：US15262003
申请日：2016-09-11
申请人： MEDIATEK INC.
发明人： Wei-Hao Chiu , Tzu-Chan Chueh , Ang-Sheng Lin
IPC分类号： H03B5/12
摘要： An oscillator for generating oscillation signals at two output terminals includes an inductor coupled between the two output terminals, a capacitor coupled between the two output terminals, two P-type transistors and two N-type transistors. Source electrodes of the two P-type transistors are coupled to a supply voltage, and gate electrodes of the two P-type transistors are coupled to the two output terminals, respectively. Source electrodes of the two N-type transistors are coupled to a supply voltage, gate electrodes of the two N-type transistors are coupled to the two output terminals, respectively, and drain electrodes of the two N-type transistors are coupled to drain electrodes of the two P-type transistors, respectively. In addition, the drain electrodes of the two N-type transistors are coupled to two internal nodes of the inductor.
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公开(公告)号：US09298199B2
公开(公告)日：2016-03-29
申请号：US14459305
申请日：2014-08-13
申请人： MEDIATEK INC.
发明人： Wei-Hao Chiu , Kun-Yin Wang , Ang-Sheng Lin
CPC分类号： G05F1/46 , H04B1/0475 , H04L27/20
摘要： A voltage generating circuit comprising: an output current generating circuit, generating an output current, such that an output voltage is generated at an output terminal, according to an output voltage control signal; a comparing device, comprising a first input terminal receiving a reference voltage, a second input terminal receiving a feedback voltage related with the output voltage, and an output terminal outputting the output voltage control signal according to the reference voltage and the feedback voltage; an adjustable voltage dropping circuit, comprising a first terminal coupled to the second input terminal, and a second terminal coupled to the output terminal; and a current source, for generating a predetermined current to the first terminal of the adjustable voltage dropping circuit, thereby the feedback voltage is generated at the first terminal of the adjustable voltage dropping circuit. The predetermined current flows through the adjustable voltage dropping circuit to the output terminal.
摘要翻译： 一种电压发生电路，包括：输出电流产生电路，根据输出电压控制信号产生输出电流，使得在输出端产生输出电压; 比较装置，包括接收参考电压的第一输入端子，接收与输出电压相关的反馈电压的第二输入端子以及根据参考电压和反馈电压输出输出电压控制信号的输出端子; 一个可调降压电路，包括耦合到第二输入端的第一端和耦合到输出端的第二端; 以及电流源，用于向可调压降电路的第一端产生预定电流，从而在可调压降电路的第一端产生反馈电压。 预定电流流过可调压降电路到输出端。
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公开(公告)号：US20210320622A1
公开(公告)日：2021-10-14
申请号：US17114410
申请日：2020-12-07
申请人： MEDIATEK INC.
发明人： Hao-Wei Huang , Ang-Sheng Lin , Wei-Hao Chiu
摘要： An inductor-capacitor (LC) oscillator with an embedded second harmonic filter and an associated dual core oscillator are provided. The LC oscillator includes a first transistor, a second transistor, a first part-one inductor, a second part-one inductor, a part-one capacitor, a part-two inductor and at least one part-two capacitor. A first end of the first part-one inductor and a first end of the second part-one inductor are coupled to gate terminals of the second transistor and the first transistor, respectively. The part-one capacitor is coupled between the first end of the first part-one inductor and the first end of the second part-one inductor. The part-two inductor is coupled between a second end of the first part-one inductor and a second end of the second part-one inductor. The at least one part-two capacitor is coupled to drain terminals of the first transistor and the second transistor.
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公开(公告)号：US09541939B2
公开(公告)日：2017-01-10
申请号：US14291463
申请日：2014-05-30
申请人： MediaTek Inc.
发明人： Liang-Ting Kuo , Wei-Hao Chiu
CPC分类号： G05F3/02 , G05F3/26 , H03K17/302 , H03K19/0027
摘要： A switching current source circuit is provided. A current source drains a bias current from a power supply via a first mirror transistor. A second mirror transistor has a source coupled to the power supply, a gate coupled to the gate of the first mirror transistor, and a drain for providing an output current. A switch is coupled between the gates of the first and second mirror transistors, and has a control terminal for receiving a control signal. A first capacitor is coupled between the gate of the second mirror transistor and the voltage generating unit. A second capacitor is coupled between the gate of the second mirror transistor and a ground. The voltage generating unit selectively provides a first voltage or a second voltage different from the first voltage to the first capacitor according to the control signal.
摘要翻译： 提供开关电流源电路。 电流源经由第一反射镜晶体管从电源漏出偏置电流。 第二反射镜晶体管具有耦合到电源的源极，耦合到第一反射镜晶体管的栅极的栅极和用于提供输出电流的漏极。 开关耦合在第一和第二反射镜晶体管的栅极之间，并且具有用于接收控制信号的控制端子。 第一电容器耦合在第二反射镜晶体管的栅极和电压产生单元之间。 第二电容器耦合在第二反射镜晶体管的栅极和地之间。 电压产生单元根据控制信号向第一电容器选择性地提供不同于第一电压的第一电压或第二电压。
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公开(公告)号：US11152891B1
公开(公告)日：2021-10-19
申请号：US17114410
申请日：2020-12-07
申请人： MEDIATEK INC.
发明人： Hao-Wei Huang , Ang-Sheng Lin , Wei-Hao Chiu
摘要： An inductor-capacitor (LC) oscillator with an embedded second harmonic filter and an associated dual core oscillator are provided. The LC oscillator includes a first transistor, a second transistor, a first part-one inductor, a second part-one inductor, a part-one capacitor, a part-two inductor and at least one part-two capacitor. A first end of the first part-one inductor and a first end of the second part-one inductor are coupled to gate terminals of the second transistor and the first transistor, respectively. The part-one capacitor is coupled between the first end of the first part-one inductor and the first end of the second part-one inductor. The part-two inductor is coupled between a second end of the first part-one inductor and a second end of the second part-one inductor. The at least one part-two capacitor is coupled to drain terminals of the first transistor and the second transistor.
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公开(公告)号：US10425038B2
公开(公告)日：2019-09-24
申请号：US15262003
申请日：2016-09-11
申请人： MEDIATEK INC.
发明人： Wei-Hao Chiu , Tzu-Chan Chueh , Ang-Sheng Lin
摘要： An oscillator for generating oscillation signals at two output terminals includes an inductor coupled between the two output terminals, a capacitor coupled between the two output terminals, two P-type transistors and two N-type transistors. Source electrodes of the two P-type transistors are coupled to a supply voltage, and gate electrodes of the two P-type transistors are coupled to the two output terminals, respectively. Source electrodes of the two N-type transistors are coupled to a supply voltage, gate electrodes of the two N-type transistors are coupled to the two output terminals, respectively, and drain electrodes of the two N-type transistors are coupled to drain electrodes of the two P-type transistors, respectively. In addition, the drain electrodes of the two N-type transistors are coupled to two internal nodes of the inductor.
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公开(公告)号：US20160336914A1
公开(公告)日：2016-11-17
申请号：US15050436
申请日：2016-02-22
申请人： MEDIATEK INC.
发明人： Kun-Yin Wang , Wei-Hao Chiu , Ang-Sheng Lin
IPC分类号： H03H7/01
CPC分类号： H03H7/0115 , H01F17/0006 , H01F2017/0073 , H03H5/12
摘要： An inductor capacitor (LC) tank includes a first inductor and a first tunable capacitive array. The first inductor has a first terminal and a second terminal, and the first tunable capacitive array has a first terminal and a second terminal. The first tunable capacitive array is at a path branching from a first point between the first terminal and the second terminal of the first inductor, the first terminal of the first tunable capacitive array is coupled to the first point, and the second terminal of the first tunable capacitive array and the second terminal of the first inductor are coupled to a reference voltage.
摘要翻译： 电感电容器（LC）箱包括第一电感器和第一可调电容阵列。 第一电感器具有第一端子和第二端子，并且第一可调谐电容阵列具有第一端子和第二端子。 第一可调电容阵列处于从第一电感器的第一端子和第二端子之间的第一点分支的路径，第一可调谐电容阵列的第一端子耦合到第一点，而第一可调电容阵列的第二端子 可调电容阵列和第一电感器的第二端耦合到参考电压。
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公开(公告)号：US20140070973A1
公开(公告)日：2014-03-13
申请号：US13802948
申请日：2013-03-14
申请人： MEDIATEK INC.
发明人： Wei-Hao Chiu , Ang-Sheng Lin
IPC分类号： H03D7/14
CPC分类号： H03D7/1491 , H03D7/1441 , H03D7/1458
摘要： A signal mixing circuit which mixes input signal(s) and oscillation signal(s) by mixer block(s) to provide a mixed signal. Each mixer block includes a summing node and a circuit unit; the summing node is arranged to provide a sum signal by summing an input signal and an oscillation signal, and the circuit unit is arranged to alternate between a first state and a second state in response to alternating of the oscillation signal; wherein the circuit unit is arranged to provide driving contribution to the mixed signal in response to the sum signal during the first state, and to stop providing driving contribution during the second state. An associated converter, e.g., a digital-to-analog converter, is also disclosed.
摘要翻译： 信号混合电路，其通过混频器块混合输入信号和振荡信号以提供混合信号。 每个混合器块包括求和节点和电路单元; 求和节点被布置成通过对输入信号和振荡信号求和来提供和信号，并且电路单元被布置成响应于振荡信号的交替而在第一状态和第二状态之间交替; 其中所述电路单元被布置为响应于在所述第一状态期间的所述和信号而提供对所述混合信号的驱动贡献，并且在所述第二状态期间停止提供驱动贡献。 还公开了相关联的转换器，例如数模转换器。
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10.发明公开公开(公告)号：US20240171162A1
公开(公告)日：2024-05-23
申请号：US18234346
申请日：2023-08-15
申请人： MEDIATEK INC.
发明人： Wei-Hao Chiu , Song-Yu Yang , Ang-Sheng Lin
CPC分类号： H03K5/01 , H03L7/08 , H03K2005/00058
摘要： A phase error compensation circuit and a method for compensating a phase error between a reference clock and a feedback clock are provided. The phase error compensation circuit includes a first programmable delay circuit, a second programmable delay circuit and at least one swapping circuit. The first programmable delay circuit provides a first delay. The second programmable delay circuit provides a second delay. At a present cycle, the first delay is unchanged, wherein the swapping circuit applies the first delay to the feedback clock for generating a compensated feedback clock and applies the second delay to the reference clock for generating a compensated reference clock. At a next cycle, the second delay is unchanged, where the swapping circuit applies the second delay to the feedback clock for generating the compensated feedback clock and applies the first delay to the reference clock for generating the compensated reference clock.
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