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公开(公告)号：US10795389B2
公开(公告)日：2020-10-06
申请号：US16217872
申请日：2018-12-12
Applicant: STMicroelectronics International N.V.
Inventor： Kapil Kumar Tyagi , Nitin Gupta
Abstract: An electronic device including a low dropout regulator having an output coupled to a first conduction terminal of a transistor, with a second conduction terminal of the transistor being coupled to an output node of the electronic device. A method for operating the device to switch into a power on mode includes: turning on the low dropout regulator, removing a DC bias from the second conduction terminal of the transistor, and turning on the transistor. A method for operating the device to switch into a power down mode includes: turning off the transistor, forming the DC bias at the second conduction terminal of the transistor, and turning off the low dropout regulator.
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Patent Agency Ranking
公开(公告)号：US11742799B2
公开(公告)日：2023-08-29
申请号：US17750137
申请日：2022-05-20
Applicant: STMicroelectronics International N.V.
Inventor： Kapil Kumar Tyagi
CPC classification number: H03B5/1265 , H03L5/00 , H03B2200/003 , H03K3/0315
Abstract: A voltage controlled oscillator (VCO) has a VCO core and a tuning bank. The tuning bank includes first and second tuning capacitors. A main switch is coupled between the first and second tuning capacitors. The tuning bank also includes control switches that receive a control signal to selectively activate the tuning bank. The main switch receives a level-shifted control signal to activate the tuning bank.
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公开(公告)号：US10198014B2
公开(公告)日：2019-02-05
申请号：US15475266
申请日：2017-03-31
Applicant: STMicroelectronics International N.V.
Inventor： Kapil Kumar Tyagi , Nitin Gupta
Abstract: A low dropout regulator produces output at an intermediate node. A resistive divider is coupled between the intermediate node and ground and provides a feedback signal to the low dropout regulator. A transistor has a first conduction terminal coupled to the intermediate node and a second conduction terminal coupled to an output node. A first impedance is coupled to the output node, a first switch selectively couples the first impedance to a supply node, a second impedance coupled to the output node, and a second switch selectively couples the second impedance to a ground node. Control circuitry is coupled to the control terminal of the transistor and to control terminals of the first and second switches. The control circuitry switches the electronic device to a power down mode by turning off transistor, closing the first and second switches, and turning off the low dropout regulator.
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公开(公告)号：US11474546B2
公开(公告)日：2022-10-18
申请号：US17012478
申请日：2020-09-04
Applicant: STMicroelectronics International N.V.
Inventor： Kapil Kumar Tyagi , Nitin Gupta
Abstract: A method is for operating an electronic device formed by a low dropout regulator (LDO) having an output coupled to a first conduction terminal of a transistor, with a second conduction terminal of the transistor being coupled to an output node. The electronic device is turned on by turning on the LDO, removing a DC bias from the second conduction terminal of the transistor by opening a first switch that selectively couples the second conduction terminal of the transistor to a supply node through a first diode coupled transistor and by opening a second switch that selectively couples the second conduction terminal of the transistor to a ground node through a second diode coupled transistor, and turning on the transistor. The electronic device is turned off by turning off the transistor, forming the DC bias at the second conduction terminal of the transistor, and turning off the LDO.
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公开(公告)号：US10911053B2
公开(公告)日：2021-02-02
申请号：US15966134
申请日：2018-04-30
Applicant: STMicroelectronics International N.V.
Inventor： Nitin Gupta , Kapil Kumar Tyagi
Abstract: A PLL includes a phase frequency detector (PFD) receiving an input signal and feedback signal, and producing a control signal. A charge pump receives the control signal and produces an initial VCO control. A loop filter generates a fine VCO control and intermediate output based upon the initial VCO control. A coarse control circuit includes an integrator having a first input receiving the intermediate output, a second input, and generating a coarse VCO control, a first switch coupling a reference voltage to the second input, a buffer buffering output of the integrator, and a second switch coupling output of the integrator to the second input of the integrator. A VCO receives the fine VCO control and the coarse VCO control, and generates an output signal having a frequency based thereupon. A feedback path receives the output signal and produces the feedback signal.
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公开(公告)号：US20180284822A1
公开(公告)日：2018-10-04
申请号：US15475266
申请日：2017-03-31
Applicant: STMicroelectronics International N.V.
Inventor： Kapil Kumar Tyagi , Nitin Gupta
IPC: G05F1/575
Abstract: A low dropout regulator produces output at an intermediate node. A resistive divider is coupled between the intermediate node and ground and provides a feedback signal to the low dropout regulator. A transistor has a first conduction terminal coupled to the intermediate node and a second conduction terminal coupled to an output node. A first impedance is coupled to the output node, a first switch selectively couples the first impedance to a supply node, a second impedance coupled to the output node, and a second switch selectively couples the second impedance to a ground node. Control circuitry is coupled to the control terminal of the transistor and to control terminals of the first and second switches. The control circuitry switches the electronic device to a power down mode by turning off transistor, closing the first and second switches, and turning off the low dropout regulator.
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