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1. 发明授权

US12107545B1 Providing temperature compensation to an RC oscillator 有权
公开(公告)号：US12107545B1
公开(公告)日：2024-10-01
申请号：US18308083
申请日：2023-04-27
申请人： Silicon Laboratories Inc.
发明人： Steffen Skaug
IPC分类号： H03B5/24 , H03B5/04 , H03K3/011 , H03K3/03 , H03K4/501 , H03L1/02
CPC分类号： H03B5/24 , H03B5/04 , H03K3/011 , H03K3/03 , H03K4/501 , H03L1/026
摘要： In one aspect, an apparatus includes an oscillator to generate a clock signal, where the oscillator includes: at least one resistor; at least one capacitor; and a circuit coupled to the at least one resistor and the at least one capacitor, the circuit to generate the clock signal. The apparatus further includes a voltage regulator coupled to the oscillator to provide a regulated voltage to the oscillator, and a bulk voltage generator coupled to the voltage regulator. The bulk voltage generator may provide first and second bulk voltages to the voltage regulator to provide temperature compensation to the oscillator.

2. 发明申请

US20210305971A1 TUNING METHOD FOR CURRENT MODE RELAXATION OSCILLATOR 有权
公开(公告)号：US20210305971A1
公开(公告)日：2021-09-30
申请号：US17330180
申请日：2021-05-25
申请人： MACRONIX INTERNATIONAL CO., LTD.
发明人： Hsien-Hung WU
IPC分类号： H03K3/0231 , H01L29/94 , H03K3/011 , H03K4/501
摘要： 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.

3. 发明授权

US11095276B2 Relaxation oscillator with an aging effect reduction technique 有权
公开(公告)号：US11095276B2
公开(公告)日：2021-08-17
申请号：US16764689
申请日：2018-11-27
申请人： ams AG
发明人： Tetsuro Okura
IPC分类号： H03K4/501 , H03K3/0231 , H03K3/011
摘要： A relaxation oscillator with an aging effect reduction technique comprises a comparator (CP) coupled with its input side (CP1, CP2) to a network comprising at least one capacitor (C, C1, C2), a plurality of transistors (M1, M2, M3, M4) and a plurality of controllable switches (SW11, . . . , SW8, SW111, . . . , SW180). The relaxation oscillator uses a switching method such that the roles of current/voltage generator's transistor and current mirror transistor are periodically swapping by the output signal of the relaxation oscillator. Reducing mismatch of operating points between current/voltage generator and current minor transistors achieves a decrease of frequency degradation caused by aging effect.

4. 发明授权

US10666235B1 Temperature compensated oscillation circuit 有权
公开(公告)号：US10666235B1
公开(公告)日：2020-05-26
申请号：US16507059
申请日：2019-07-10
申请人： Chia-Yuan Chou , An-Chi Tsai
发明人： Chia-Yuan Chou , An-Chi Tsai
IPC分类号： H03K3/0231 , H03K4/501 , H03K3/011
摘要： A temperature compensated oscillation circuit is provided. The temperature compensated oscillation circuit generates a first delay voltage and a second delay voltage according to the first resistance value. A first order term of a temperature change function of the first resistance value is eliminated. The temperature compensated oscillation circuit generates a reference voltage according to a first reference resistance value and a second reference resistance value. A first order term of a temperature change function of the first reference resistance value is set to equal to a first order term of a temperature change function of the second reference resistance value. The second reference resistance value is adjusted such that variation of the reference voltage matches a second order term of the temperature change function of the first resistance value, thereby providing a clock that does not vary due to a variation in temperature.

5. 发明授权

US10581411B2 Relaxation oscillator and wireless device including relaxation oscillator 有权
公开(公告)号：US10581411B2
公开(公告)日：2020-03-03
申请号：US15992870
申请日：2018-05-30
申请人： ABLIC Inc.
发明人： Toshiyuki Tanaka , Biao Shen , Hiroyuki Yonetani
IPC分类号： H03K3/0231 , H03K4/08 , H03K3/03 , H03K4/501 , H03K3/013 , H03K3/011
摘要： Provided is a relaxation oscillator having an extremely small temperature deviation in oscillation frequency. A first current (I1) generated by a reference voltage source and a first resistor having a positive first-order temperature coefficient is supplied to a first variable capacitor (C1) for oscillation, and a second current (I2) generated by a reference voltage source and a second resistor having a negative first-order temperature coefficient is supplied to a second variable capacitor (C2) for oscillation. A product of a value of a ratio of a first current to a second current and a value of a ratio of a first-order temperature coefficient of the second resistor to a first-order temperature coefficient of the first resistor, and a value of a ratio of a capacitance of the first variable capacitor to a capacitance of the second variable capacitor have the same absolute value and opposite signs.

6. 发明申请

US20190319611A1 QUADRATURE PHASE RELAXATION OSCILLATOR USING FREQUENCY ERROR COMPENSATION LOOP 审中-公开
公开(公告)号：US20190319611A1
公开(公告)日：2019-10-17
申请号：US16469621
申请日：2017-11-30
申请人： POSTECH ACADEMY-INDUSTRY FOUNDATION
发明人： Jae Yoon SIM , Ja Hyun KOO
IPC分类号： H03K3/0231 , H03K4/501 , H03K4/52 , H03K3/011
摘要： The present invention relates to a technology capable of compensating for a frequency error in a quadrature relaxation oscillator. The quadrature relaxation oscillator generates a signal at a desired frequency by using a resistor and a capacitor which are less insensitive to a PVT (Process, Voltage, Temperature) variation, generates a signal at a desired frequency by compensating for an error from design, which is caused by a mismatch between circuits due to a characteristic of a semiconductor process, through a feedback lop, and removes noise.

7. 发明申请

US20170338806A1 TRIANGULAR WAVE GENERATOR 审中-公开
公开(公告)号：US20170338806A1
公开(公告)日：2017-11-23
申请号：US15590864
申请日：2017-05-09
申请人： SK Hynix Inc. , Seoul National University R&DB FOUNDATION
发明人： Joohyung CHAE , Hankyu CHI , Suhwan KIM , Deog-Kyoon JEONG
IPC分类号： H03K4/501 , H03K5/1534
CPC分类号： H03K4/501 , H03K5/1534
摘要： A triangular wave generator includes a wave generator configured to generate a triangular wave according to a clock signal and a control signal. The triangular wave generator further includes a wave controller configured to adjust a value of the control signal in a correction mode. The control signal includes a first bias control signal, a second bias control signal, and a capacitance control signal.

8. 发明授权

US08665029B2 Oscillator module and reference circuit thereof 有权
标题翻译：振荡器模块及其参考电路
公开(公告)号：US08665029B2
公开(公告)日：2014-03-04
申请号：US13445218
申请日：2012-04-12
申请人： Wei-Kai Tseng
发明人： Wei-Kai Tseng
IPC分类号： H03K3/0231 , H03K3/354 , H03K3/011 , G05F3/24 , G05F3/26 , H03K4/501
CPC分类号： H03K3/354 , G05F3/245 , G05F3/262 , H03K3/011 , H03K3/0231 , H03K4/501 , H03L1/022
摘要： A reference circuit for an oscillator module is provided. The reference circuit includes a reference voltage generation unit and a reference current generation unit. The reference voltage generation unit includes an electric element having a voltage proportional to absolute temperature (PTAT voltage) and provides a reference voltage based on the PTAT voltage. The reference current generation unit is coupled to the reference voltage generation unit and provides a reference current to the oscillator circuit to serve as an input current based on the PTAT voltage. The oscillator circuit generates a clock signal based on the reference voltage and the input current. The reference voltage and the input current are proportional to absolute temperature and have the same change trend relative to absolute temperature, such that the clock signal is a temperature insensitive signal. An oscillator module including an oscillator circuit and the foregoing reference circuit is also provided.
摘要翻译：提供了振荡器模块的参考电路。参考电路包括参考电压产生单元和参考电流产生单元。参考电压产生单元包括具有与绝对温度（PTAT电压）成比例的电压的电气元件，并且基于PTAT电压提供参考电压。参考电流产生单元耦合到参考电压产生单元，并且将基准电流提供给振荡器电路以用作基于PTAT电压的输入电流。振荡电路根据参考电压和输入电流产生时钟信号。参考电压和输入电流与绝对温度成比例，并且相对于绝对温度具有相同的变化趋势，使得时钟信号是温度不敏感信号。还提供了包括振荡器电路和上述参考电路的振荡器模块。

9. 发明授权

US5387882A Switched capacitor charge pump and sawtooth oscillator using same 失效
标题翻译：开关电容器电荷泵和锯齿波振荡器使用相同的
公开(公告)号：US5387882A
公开(公告)日：1995-02-07
申请号：US216122
申请日：1994-03-22
申请人： Franciscus A. C. M. Schoofs
发明人： Franciscus A. C. M. Schoofs
IPC分类号： H03H19/00 , H03K4/50 , H03K4/501 , H03K3/023 , H03K3/354
CPC分类号： H03K4/50
摘要： Charge pump including: a capacitor (4) which includes a first capacitor terminal (2) and a second capacitor terminal (8), a discharge switch (20) for discharging the capacitor (4) by the closing and opening of the discharge switch (20) in response to a first or second value respectively, of a clock signal (CS), a first current source (6) for supplying a first current (I1) to the first capacitor terminal (2), a comparator (12) whose first input (10) is connected to the first capacitor terminal (2) and whose second input (14) is connected to a reference voltage source (16) and which comparator generates a comparison signal (Vcomp) of which a first or second value denotes that the voltage (Vc) on the first input (10) is smaller or larger than the voltage on the second input (14), a current switch (24) passing a second current (I2) coming from the second current source (34) to an output terminal (28) once the clock signal (CS) has changed from the first to the second value, and prevents the second current (I2) flowing to the output terminal (28) once the comparison signal (Vcomp) has changed from the first to the second value. A sawtooth oscillator is formed by using the charge pump as a timing circuit with the oscillator providing the clock signal, and the second current from the output terminal being fed back to the first capacitor terminal.
摘要翻译：电荷泵，包括：包括第一电容器端子（2）和第二电容器端子（8）的电容器（4），用于通过放电开关的闭合和断开使电容器（4）放电的放电开关（20） 20），分别响应于时钟信号（CS）的第一或第二值，用于向第一电容器端子（2）提供第一电流（I1）的第一电流源（6），比较器（12），其第一输入端（10）连接到第一电容端子（2），其第二输入端（14）连接到参考电压源（16），该比较器产生比较信号（Vcomp），其中第一或第二值表示第一输入端（10）上的电压（Vc）小于或大于第二输入端（14）上的电压，通过来自第二电流源（34）的第二电流（I2）的电流开关（24）一旦时钟信号（CS）从第一值变为第二值，就输出到输出端（28），并防止th 一旦比较信号（Vcomp）从第一值变为第二值，则流过输出端（28）的第二电流（I2）。通过使用电荷泵作为时钟电路形成锯齿波形，振荡器提供时钟信号，并且来自输出端的第二电流被反馈到第一电容器端子。

10. 发明授权

US5120984A Sawtooth generator with two-step discharge 失效
标题翻译：具有两步放电的SAWTOOTH发电机
公开(公告)号：US5120984A
公开(公告)日：1992-06-09
申请号：US749366
申请日：1991-08-22
申请人： Paul Klatser
发明人： Paul Klatser
IPC分类号： H03K4/501 , H03K4/50
CPC分类号： H03K4/50
摘要： A sawtooth generator for an oscilloscope which provides an accurate DC voltage control after flyback of the sawtooth voltage. The sawtooth generator includes a balance circuit in the control loop and an error amplifier with symmetrical outputs. A current-mirrored copy of the integration current is supplied as the tail current for the balance circuit. The control loop is thus forced to control around a zero error signal.

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