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1. 发明授权

US10090674B2 Maximum supply voltage selection 有权
公开(公告)号：US10090674B2
公开(公告)日：2018-10-02
申请号：US14860186
申请日：2015-09-21
申请人： Silicon Laboratories Inc.
发明人： Mohamed Mostafa Elsayed , Kenneth W. Fernald , Axel Thomsen
IPC分类号： H02J1/10 , H03K5/24
摘要： A method includes providing supply voltages to a supply voltage switching circuit that controls routing of the supply voltages to power consuming circuitry associated with the supply voltage switching circuit. The method includes comparing the supply voltages, including using at least one relatively lower precision comparator to compare the supply voltages for a relatively large difference between the supply voltages; and using at least one relatively higher precision comparator to compare the supply voltages for a relatively smaller difference between the supply voltages. The method further includes, based on a result of comparing the supply voltages, selectively coupling the supply voltages to at least one of an isolation well and a power supply rail of the supply voltage switching circuit.

2. 发明申请

US20170133931A1 SLEW-RATE CONTROLLED SUPPLY VOLTAGE SWITCHING 审中-公开
公开(公告)号：US20170133931A1
公开(公告)日：2017-05-11
申请号：US14933285
申请日：2015-11-05
申请人： SILICON LABORATORIES INC.
发明人： Mohamed Mostafa Elsayed , Kenneth W. Fernald , Matthew Powell
IPC分类号： H02M3/158
CPC分类号： H02M3/158 , H02M2001/0029
摘要： A technique includes switching a supply rail from receiving a first voltage to receiving a second voltage; and regulating a slew rate associated with the switching.

3. 发明授权

US09866215B2 High speed low current voltage comparator 有权
公开(公告)号：US09866215B2
公开(公告)日：2018-01-09
申请号：US14870185
申请日：2015-09-30
申请人： Silicon Laboratories Inc.
发明人： Nicholas Montgomery Atkinson , Praveen Kallam , Mohamed Mostafa Elsayed
IPC分类号： H03K5/06 , H03K19/00 , H03K5/24
CPC分类号： H03K19/0016 , H03K5/06 , H03K5/2481
摘要： In one embodiment, a voltage comparator circuit includes a first comparator circuit to compare a first voltage and a second voltage and a second comparator circuit to compare the first voltage and the second voltage. The voltage comparator circuit may include charge storage circuitry and positive feedback circuitry. Such circuitry may boost current within the first and second comparator circuits to enable the voltage comparator circuit to output a comparison decision within a delay threshold in response to input transitions within a slew rate threshold.

4. 发明授权

US09614528B2 Reference buffer circuits including a non-linear feedback factor 有权
公开(公告)号：US09614528B2
公开(公告)日：2017-04-04
申请号：US14562707
申请日：2014-12-06
申请人： Silicon Laboratories Inc.
发明人： Mohamed Mostafa Elsayed , Shouli Yan
IPC分类号： H03K3/00 , H03K19/0185
CPC分类号： H03K19/018507
摘要： In an embodiment, an apparatus may include an amplifier circuit including a first input to receive a signal, a second input to receive a feedback signal, and an output. The apparatus may further include a buffer circuit including an input coupled to the output of the amplifier and including an output coupled to an output node. The apparatus may also include a feedback circuit coupled between the output node and the second input of the amplifier circuit. The feedback circuit may include at least one non-linear resistor configured to define a feedback ratio that changes in response to a voltage at the output node.

5. 发明授权

US10468983B2 Slew-rate controlled supply voltage switching 有权
公开(公告)号：US10468983B2
公开(公告)日：2019-11-05
申请号：US14933285
申请日：2015-11-05
申请人： SILICON LABORATORIES INC.
发明人： Mohamed Mostafa Elsayed , Kenneth W. Fernald , Matthew Powell
IPC分类号： H02M3/158 , H03K17/04 , H02M1/00
摘要： An apparatus includes a slew rate regulation circuit, a plurality of switches and a controller circuit. The controller circuit controls the plurality of switches to decouple a first source supply voltage from a supply rail; control the plurality of switches to couple a second source supply voltage to the supply rail to replace the first source supply voltage with the second source supply voltage; and control the slew rate regulation circuit to regulate a slew rate of a voltage of the supply rail during a time interval in which the first source supply voltage is being replaced with the second source supply voltage.

6. 发明申请

US20170093399A1 HIGH SPEED LOW CURRENT VOLTAGE COMPARATOR 有权
公开(公告)号：US20170093399A1
公开(公告)日：2017-03-30
申请号：US14870185
申请日：2015-09-30
申请人： Silicon Laboratories Inc.
发明人： Nicholas Montgomery Atkinson , Praveen Kallam , Mohamed Mostafa Elsayed
IPC分类号： H03K19/00 , H03K5/06 , H03K5/24
CPC分类号： H03K19/0016 , H03K5/06 , H03K5/2481
摘要： In one embodiment, a voltage comparator circuit includes a first comparator circuit to compare a first voltage and a second voltage and a second comparator circuit to compare the first voltage and the second voltage. The voltage comparator circuit may include charge storage circuitry and positive feedback circuitry. Such circuitry may boost current within the first and second comparator circuits to enable the voltage comparator circuit to output a comparison decision within a delay threshold in response to input transitions within a slew rate threshold.

7. 发明申请

US20160164522A1 Reference Buffer Circuits Including a Non-linear Feedback Factor 有权
标题翻译：包括非线性反馈因子的参考缓冲电路
公开(公告)号：US20160164522A1
公开(公告)日：2016-06-09
申请号：US14562707
申请日：2014-12-06
申请人： Silicon Laboratories Inc.
发明人： Mohamed Mostafa Elsayed , Shouli Yan
IPC分类号： H03K19/0185
CPC分类号： H03K19/018507
摘要： In an embodiment, an apparatus may include an amplifier circuit including a first input to receive a signal, a second input to receive a feedback signal, and an output. The apparatus may further include a buffer circuit including an input coupled to the output of the amplifier and including an output coupled to an output node. The apparatus may also include a feedback circuit coupled between the output node and the second input of the amplifier circuit. The feedback circuit may include at least one non-linear resistor configured to define a feedback ratio that changes in response to a voltage at the output node.
摘要翻译：在一个实施例中，装置可以包括放大器电路，其包括用于接收信号的第一输入端，用于接收反馈信号的第二输入端和输出端。该装置还可以包括缓冲器电路，其包括耦合到放大器的输出并包括耦合到输出节点的输出的输入。该装置还可以包括耦合在输出节点和放大器电路的第二输入端之间的反馈电路。反馈电路可以包括至少一个非线性电阻器，其被配置为定义响应于输出节点处的电压而改变的反馈比率。

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