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公开(公告)号：US09836075B2
公开(公告)日：2017-12-05
申请号：US14521536
申请日：2014-10-23
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
Inventor： Min Chen , Wen Liu , Hong Xia Li
Abstract: A voltage detector operates to detect a system power supply voltage and generate a trigger signal. A control signal generator responds to the trigger signal and generates a control signal. A DC bias generator responds to the control signal by generating a DC bias. The control signal controls the DC bias to have a first value when the power supply voltage is a first voltage and have a second value when the power supply voltage is a second voltage different from the first voltage, wherein the first value is different from the second value. A dynamic DC bias is generated which can not only support a larger voltage scope, but also significantly improves signal to noise ratio. The system power supply detection may concern stop/start operation of an automobile engine.
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公开(公告)号：US20150115927A1
公开(公告)日：2015-04-30
申请号：US14521536
申请日：2014-10-23
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
Inventor： Min Chen , Wen Liu , Hong Xia Li
IPC: G05F5/00
Abstract: A voltage detector operates to detect a system power supply voltage and generate a trigger signal. A control signal generator responds to the trigger signal and generates a control signal. A DC bias generator responds to the control signal by generating a DC bias. The control signal controls the DC bias to have a first value when the power supply voltage is a first voltage and have a second value when the power supply voltage is a second voltage different from the first voltage, wherein the first value is different from the second value. A dynamic DC bias is generated which can not only support a larger voltage scope, but also significantly improves signal to noise ratio. The system power supply detection may concern stop/start operation of an automobile engine.
Abstract translation: 电压检测器用于检测系统电源电压并产生触发信号。 控制信号发生器响应触发信号并产生控制信号。 DC偏置发生器通过产生DC偏压来响应控制信号。 当电源电压为第一电压时，控制信号控制DC偏压具有第一值，当电源电压是与第一电压不同的第二电压时，控制信号具有第二值，其中第一值不同于第二电压 值。 产生动态直流偏置，不仅可以支持更大的电压范围，而且可以显着提高信噪比。 系统电源检测可能涉及汽车发动机的停止/起动操作。
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公开(公告)号：US10917086B2
公开(公告)日：2021-02-09
申请号：US16410857
申请日：2019-05-13
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.
Inventor： Jian Wen , Hong Xia Li , Mei Yang
IPC: H03K17/687 , H03F3/45 , G01R31/30
Abstract: In an embodiment, a power switch controller for driving a back-to-back power switch includes: an amplifier having a supply terminal configured to receive a supply voltage, an output configured to be coupled to a gate terminal of the back-to-back power switch, a first input configured to be coupled a source terminal of the back-to-back power switch, and a second input coupled to the output of the amplifier. The amplifier is configured to generate an output voltage at the output of the amplifier, the output voltage being an offset voltage higher than a voltage at the first input of the amplifier.
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