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公开(公告)号：US20180017983A1
公开(公告)日：2018-01-18
申请号：US15675872
申请日：2017-08-14
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
Inventor： Ni Zeng
IPC: G05F1/573
CPC classification number: G05F1/573
Abstract: A current limiting circuit includes a current sensing module that is configured to sense an output current of a power transistor and to generate a corresponding sensing current which is proportional to the output current. A first current limiting module coupled to the current sensing module is configured to generate a first limiting current based on the sensing current when a variation of the output current of the power transistor exceeds a first current level. A second current limiting module coupled to the current sensing module is configured to generate a second limiting current based on the sensing current when a variation of the output current of the power transistor exceeds a second current level. A converting module coupled to the first and second current limiting modules and the power transistor controls a gate voltage of the power transistor based at least on the first and second limiting currents.
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公开(公告)号：US09853560B2
公开(公告)日：2017-12-26
申请号：US14747242
申请日：2015-06-23
Applicant: STMICROELECTRONICS (SHENZHEN) R&D CO. LTD , STMICROELECTRONICS (CHINA) INVESTMENT CO. LTD
Inventor： Henry Ge , Welsin Wang , Xing Zhang
CPC classification number: H02M7/06 , G01R11/40 , G01R11/42 , H02M7/068 , H02M2001/0064
Abstract: Congruent power and timing signals in a single electronic device. In an embodiment, a circuit may include just one isolation transformer operable to generate a power signal and a timing signal. On the secondary side, two branches may extract both a power signal and a clock signal for use in the circuit on the isolated secondary side. The first branch may be coupled to the transformer and operable to manipulate the signal into a power signal, such as a 5V DC signal. Likewise, the second circuit branch is operable to manipulate the signal into a clock signal, such as a 5 V signal with a frequency of 1 MHz. By extracting both a power supply signal and a clock signal from the same isolation transformer on the secondary side, valuable space may be saved on an integrated circuit device with only having a single winding for a single isolation transformer.
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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：US09772638B2
公开(公告)日：2017-09-26
申请号：US14592040
申请日：2015-01-08
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
Inventor： Ni Zeng
IPC: G05F1/575
CPC classification number: G05F1/575
Abstract: A low dropout amplifier may include an error amplifier having first and second inputs coupled to a reference signal and a feedback signal, respectively. The error amplifier may be configured to generate first and second error signals at first and second outputs, respectively, with the first and second error signals based upon a difference between the reference signal and the feedback signal. A sink stage may be coupled to the first output and configured to generate a sink current based upon the first error signal. A source stage may be coupled to the second output and configured to generate a source current based upon the second error signal. An output node may be coupled to receive the sink and source currents.
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公开(公告)号：US09760108B2
公开(公告)日：2017-09-12
申请号：US14887739
申请日：2015-10-20
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
Inventor： Yong Feng Liu
IPC: G05F3/26
CPC classification number: G05F3/267
Abstract: A Schmitt trigger circuit having an input coupled to a current summing junction. A trickle current source generates a trickle current applied to the current summing junction. A bandgap current source generates a bandgap current applied to the current summing junction (wherein the bandgap current is fixed when a supply voltage exceeds a threshold). A variable current source generates a variable current applied to the current summing junction (wherein the variable current varies dependent on the supply voltage). At the current summing junction, the variable current is offset against the trickle and bandgap currents with respect to generating a voltage that is sensed at the Schmitt trigger circuit input.
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Patent Agency Ranking
公开(公告)号：US20170250609A1
公开(公告)日：2017-08-31
申请号：US15592757
申请日：2017-05-11
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
Inventor： Hai Bo Zhang , Jerry Huang
CPC classification number: H02M3/1582 , H02M1/08 , H02M3/156 , H02M3/158 , H02M2001/0009 , H02M2001/0032 , H03K2217/0063 , H03K2217/0072 , H03K2217/0081 , Y02B70/16
Abstract: A driver circuit includes a high-side power transistor having a source-drain path coupled between a first node and a second node and a low-side power transistor having a source-drain path coupled between the second node and a third node. A high-side drive circuit, having an input configured to receive a drive signal, includes an output configured to drive a control terminal of said high-side power transistor. The high-side drive circuit is configured to operate as a capacitive driver. A low-side drive circuit, having an input configured to receive a complement drive signal, includes an output configured to drive a control terminal of said low-side power transistor. The low-side drive circuit is configured to operate as a level-shifting driver.
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公开(公告)号：US20170223796A1
公开(公告)日：2017-08-03
申请号：US15486652
申请日：2017-04-13
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
Inventor： Yi Jun Duan , Tao Tao Huang
CPC classification number: H05B33/0851 , H03F3/45215 , H03F2200/351 , H05B33/0812 , H05B33/0815 , H05B33/0827 , H05B33/0887 , Y02B20/341 , Y02B20/347
Abstract: A driving apparatus configured to drive a light emitting device includes a driving current source module operable to supply current to the light emitting device via a node during operation. A protection module coupled to the node and the driving current source module selectively injects current to the node during operation. The driving current source module is controlled based on a detection result of a voltage on the node.
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公开(公告)号：US09680377B2
公开(公告)日：2017-06-13
申请号：US14538115
申请日：2014-11-11
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
Inventor： Hai Bo Zhang , Jerry Huang
CPC classification number: H02M3/1582 , H02M1/08 , H02M3/156 , H02M3/158 , H02M2001/0009 , H02M2001/0032 , H03K2217/0063 , H03K2217/0072 , H03K2217/0081 , Y02B70/16
Abstract: A driver circuit includes a high-side power transistor having a source-drain path coupled between a first node and a second node and a low-side power transistor having a source-drain path coupled between the second node and a third node. A high-side drive circuit, having an input configured to receive a drive signal, includes an output configured to drive a control terminal of said high-side power transistor. The high-side drive circuit is configured to operate as a capacitive driver. A low-side drive circuit, having an input configured to receive a complement drive signal, includes an output configured to drive a control terminal of said low-side power transistor. The low-side drive circuit is configured to operate as a level-shifting driver.
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公开(公告)号：US09672762B2
公开(公告)日：2017-06-06
申请号：US14818924
申请日：2015-08-05
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
Inventor： Meng Wang , Tao Tao Huang
IPC: H03K3/00 , G09G3/20 , H02M3/158 , H03K17/687 , H03K17/0412 , G09G3/3208
CPC classification number: G09G3/3225 , G09G3/20 , G09G3/3208 , G09G3/3648 , G09G2300/0842 , G09G2310/0259 , G09G2310/0291 , G09G2320/041 , G09G2320/043 , G09G2330/02 , G09G2330/025 , G09G2330/028 , H02M3/158 , H03K5/12 , H03K17/04123 , H03K17/687 , H03K2217/0063 , H03K2217/0072
Abstract: A low side driver includes a first transistor coupled in series with a second transistor at a low side voltage node for a load. A capacitance is configured to store a voltage and a voltage buffer circuit has an input coupled to receive the voltage stored by the capacitance and an output coupled to drive a control node of the second transistor with the stored voltage. A current source supplies current through a switch to the capacitance and the input of the voltage buffer circuit. The switch is configured to be actuated by an oscillating enable signal so as to cyclically source current from the current source to the capacitance and cause a stepped increase in the stored voltage which is applied by the buffer circuit to the control node of the second transistor.
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公开(公告)号：US09667138B2
公开(公告)日：2017-05-30
申请号：US14825267
申请日：2015-08-13
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
CPC classification number: H02M3/08 , G05F3/205 , G05F3/242 , H03K17/302 , H03K2217/0018
Abstract: An electronic device includes a transistor having a body and a body biasing circuit. The body biasing circuit includes a threshold estimator circuit to estimate a threshold voltage of the transistor and a comparison circuit to compare the threshold voltage of the transistor to a reference threshold voltage and to generate a comparison signal based thereupon. A bias adjust circuit generates a body biasing voltage that biases the body of the transistor as a function of the comparison signal, the body biasing voltage being a voltage that, when applied to the body of the transistor, adjusts the threshold voltage thereof to be equal to the reference threshold voltage.
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