公开(公告)号：US12088250B2

公开(公告)日：2024-09-10

申请号：US17986606

申请日：2022-11-14

Applicant: MACRONIX INTERNATIONAL CO., LTD.

Inventor： Hsien-Hung Wu

IPC: H03B5/04 ,  H03B5/24

CPC classification number: H03B5/04 ,  H03B5/24

Abstract: A thermally compensated circuit includes a first adjustable circuit, like an adjustable current source, to produce a first adjustable signal, such a reference current. The circuit includes a second adjustable circuit to produce a second adjustable signal, such as a reference voltage. Circuitry responsive to the first and second adjustable signals produces an output, such as a clock signal. A tunable circuit in the first adjustable circuit and a tunable first element of the second adjustable circuit set an operating characteristic, such as a clock period, of the output to a target level at a first temperature. A tunable second element of the second adjustable circuit sets the operating characteristic of the output signal at the target level at a second temperature. Tuning of the second tunable element at the second temperature does not substantially change the operating characteristic of the output signal at the first temperature.

公开(公告)号：US10128794B2

公开(公告)日：2018-11-13

申请号：US15280892

申请日：2016-09-29

Applicant: MACRONIX INTERNATIONAL CO., LTD.

Inventor： Hsien-Hung Wu

IPC: H03B5/24 ,  H03K3/0231 ,  H03K4/501

Abstract: An oscillator produces an oscillator output signal usable as a clock signal, otherwise as a frequency reference on an integrated circuit. The oscillator includes an RC network with a voltage-controlled element, such as a voltage-controlled resistor, voltage-controlled capacitor or a combination including a voltage-controlled resistor and voltage-controlled capacitor. Also, a tunable element having an adjustable resistance determined by a first static parameter is included in the RC network. The oscillator also includes a feedback circuit which can include a frequency-to-voltage converter. The feedback circuit generates a control signal for the voltage-controlled element. The feedback circuit includes a feedback reference circuit having a reference output determined by a second static parameter, and a loop amplifier responsive to the reference output and the oscillator output signal.

公开(公告)号：US11641189B2

公开(公告)日：2023-05-02

申请号：US17330180

申请日：2021-05-25

Applicant: MACRONIX INTERNATIONAL CO., LTD.

Inventor： Hsien-Hung Wu

IPC: H03K3/0231 ,  H01L29/94 ,  H03K3/011 ,  H03K4/501

Abstract: A relaxation oscillator includes an adjustable reference circuit generator to produce a reference current which is applied to a charging circuit. The charging circuit is configured to charge a capacitive node as a function of the reference current and a capacitance of an adjustable capacitor that is operably coupled to the capacitive node. A comparator having inputs operatively coupled to a reference voltage node and to the capacitive node, generates a comparator output. A control circuit alternatively enables the charging circuit to charge the capacitive node and to discharge the capacitive node in response to changes in the comparator output. Also, the control circuit outputs and oscillator output signal have an oscillator period as a function of the adjustable capacitance and the adjustable reference current.

公开(公告)号：US09461623B2

公开(公告)日：2016-10-04

申请号：US14279004

申请日：2014-05-15

Applicant: MACRONIX International Co., Ltd.

Inventor： Hsien-Hung Wu ,  Yi-Ching Liu ,  Shin-Jang Shen

IPC: H03K3/011 ,  H03K4/48 ,  H03B5/12 ,  H03K3/0231

CPC classification number: H03K3/011 ,  H03B5/1265 ,  H03K3/0231 ,  H03K4/48

Abstract: A method and a circuit for generating a clock signal from a clock integrated circuit are introduced herein. A compensation voltage is generated according to a temperature coefficient of a resistor and a clock period of a clock circuit, where the compensation voltage is resistor-corner independent. The clock period of the clock circuit is determined by the resistor and at least one capacitor of the clock circuit. The temperature dependence of the clock period of the clock circuit is reduced according to the compensation voltage.

Abstract translation: 这里介绍了用于从时钟集成电路产生时钟信号的方法和电路。 根据电阻的温度系数和时钟电路的时钟周期产生补偿电压，其中补偿电压为电阻 - 角独立。 时钟电路的时钟周期由电阻器和时钟电路的至少一个电容器确定。 根据补偿电压，时钟电路的时钟周期的温度依赖性降低。

公开(公告)号：US11043936B1

公开(公告)日：2021-06-22

申请号：US16833270

申请日：2020-03-27

Applicant: MACRONIX INTERNATIONAL CO., LTD.

Inventor： Hsien-Hung Wu

IPC: H03K3/0231 ,  H01L29/94 ,  H03K3/011 ,  H03K4/501

Abstract: A relaxation oscillator includes an adjustable reference circuit generator to produce a reference current which is applied to a charging circuit. The charging circuit is configured to charge a capacitive node as a function of the reference current and a capacitance of an adjustable capacitor that is operably coupled to the capacitive node. A comparator having inputs operatively coupled to a reference voltage node and to the capacitive node, generates a comparator output. A control circuit alternatively enables the charging circuit to charge the capacitive node and to discharge the capacitive node in response to changes in the comparator output. Also, the control circuit outputs and oscillator output signal have an oscillator period as a function of the adjustable capacitance and the adjustable reference current.

公开(公告)号：US20180091096A1

公开(公告)日：2018-03-29

申请号：US15280892

申请日：2016-09-29

Applicant: MACRONIX INTERNATIONAL CO., LTD.

Inventor： Hsien-Hung Wu

IPC: H03B5/24 ,  H03K4/501

CPC classification number: H03B5/24 ,  H03B5/26 ,  H03K3/011 ,  H03K3/0231 ,  H03K4/501

Abstract: An oscillator produces an oscillator output signal usable as a clock signal, otherwise as a frequency reference on an integrated circuit. The oscillator includes an RC network with a voltage-controlled element, such as a voltage-controlled resistor, voltage-controlled capacitor or a combination including a voltage-controlled resistor and voltage-controlled capacitor. Also, a tunable element having an adjustable resistance determined by a first static parameter is included in the RC network. The oscillator also includes a feedback circuit which can include a frequency-to-voltage converter. The feedback circuit generates a control signal for the voltage-controlled element. The feedback circuit includes a feedback reference circuit having a reference output determined by a second static parameter, and a loop amplifier responsive to the reference output and the oscillator output signal.

公开(公告)号：US11675384B2

公开(公告)日：2023-06-13

申请号：US17494493

申请日：2021-10-05

Applicant: MACRONIX INTERNATIONAL CO., LTD.

Inventor： Hsien-Hung Wu

IPC: G05F3/26

CPC classification number: G05F3/262

Abstract: A reference voltage circuit includes a first circuit including a first PN junction device and a first resistor connected in series between a power supply node and a first node, and a second resistor connected between the first node and an intermediate node, and a third resistor connected between the intermediate node and a reference voltage output node, and a second circuit including a second PN junction device connected between the power supply node and a second node and a fourth resistor connected between the second node and the intermediate node. A feedback current causes voltage across the first resistor to offset changes in voltage across the first PN junction device. A correction current is applied to boost and or sink current in the voltage reference generator to extend the operating temperature range.

公开(公告)号：US10775834B2

公开(公告)日：2020-09-15

申请号：US16502655

申请日：2019-07-03

Applicant: MACRONIX INTERNATIONAL CO., LTD.

Inventor： Hsien-Hung Wu

IPC: G06F1/08 ,  G05F1/10 ,  H03C3/09 ,  H03L7/07 ,  H03L7/097

Abstract: A circuit generates a clock signal with a tunable clock period. The circuit comprises capacitors, first tuning circuitry and second tuning circuitry. The first tuning circuitry is configured to adjust the clock period with a first period tuning step based on a first parameter and the second tuning circuit is configured to adjust the clock period with a second period tuning step based on a second parameter. The first period tuning step is different than the second period tuning step.

公开(公告)号：US20150333736A1

公开(公告)日：2015-11-19

申请号：US14279004

申请日：2014-05-15

Applicant: MACRONIX International Co., Ltd.

Inventor： Hsien-Hung Wu ,  Yi-Ching Liu ,  Shin-Jang Shen

IPC: H03K3/011

CPC classification number: H03K3/011 ,  H03B5/1265 ,  H03K3/0231 ,  H03K4/48

Abstract: A method and a circuit for generating a clock signal from a clock integrated circuit are introduced herein. A compensation voltage is generated according to a temperature coefficient of a resistor and a clock period of a clock circuit, where the compensation voltage is resistor-corner independent. The clock period of the clock circuit is determined by the resistor and at least one capacitor of the clock circuit. The temperature dependence of the clock period of the clock circuit is reduced according to the compensation voltage.

Abstract translation: 这里介绍了用于从时钟集成电路产生时钟信号的方法和电路。 根据电阻的温度系数和时钟电路的时钟周期产生补偿电压，其中补偿电压为电阻 - 角独立。 时钟电路的时钟周期由电阻器和时钟电路的至少一个电容器确定。 根据补偿电压，时钟电路的时钟周期的温度依赖性降低。

公开(公告)号：US09146569B2

公开(公告)日：2015-09-29

申请号：US13862963

申请日：2013-04-15

Applicant: Macronix International Co., Ltd.

Inventor： Chia-Ching Li ,  Hsien-Hung Wu ,  Hsin-Yi Ho ,  Han-Sung Chen ,  Chun-Hsiung Hung ,  Tzung-Shen Chen

IPC: G05F1/00 ,  G05F1/565

CPC classification number: G05F1/565

Abstract: A regulator comprises an amplifier, a bias circuit, and a current trimming circuit. The bias circuit is coupled to the amplifier and supplies a first bias current to the amplifier in a first mode of a system including the regulator. The current trimming circuit is coupled to the bias circuit to adjust the first bias current.

Abstract translation: 调节器包括放大器，偏置电路和电流微调电路。 偏置电路耦合到放大器并且在包括调节器的系统的第一模式中向放大器提供第一偏置电流。 电流微调电路耦合到偏置电路以调节第一偏置电流。