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1.发明申请公开(公告)号：US20200153442A1
公开(公告)日：2020-05-14
申请号：US16740871
申请日：2020-01-13
Applicant: STMicroelectronics International N.V.
Inventor： Nitin GUPTA , Jeet Narayan TIWARI
Abstract: A method of quickly locking a locked loop includes generating an intermediate reference signal having an intermediate reference frequency between a desired output frequency and a reference frequency of a reference signal, and setting an output frequency of a controllable oscillator to the desired output frequency using a first locked loop having a first loop divider value. The first loop divider value is set such that the intermediate reference frequency multiplied by the first loop divider value is equal to the desired output frequency. The controllable oscillator is then coupled to a second locked loop when the first locked loop locks, with the second locked loop is being activated. The first locked loop is then deactivated.
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2.发明申请公开(公告)号：US20200186155A1
公开(公告)日：2020-06-11
申请号：US16696247
申请日：2019-11-26
Applicant: STMicroelectronics International N.V.
Inventor： Nitin GUPTA
Abstract: An oscillator circuit powered by a source voltage generates an oscillating output signal. The oscillating output signal is level shifted and applied to a first input of a multiplexer. A second input of the multiplexer receives the oscillating output signal. The multiplexer selects one of the oscillating output signal and the level shifted oscillating output signal for output as a selected oscillating output signal in response to a select signal. A locked loop circuit generates controls a frequency of the oscillating output signal as a function of the selected oscillating output signal and a reference oscillating signal. The select signal further selects one of a reference voltage and the source voltage of the oscillator circuit as an error amplifier reference voltage for a voltage regulator circuit that generates the first power supply voltage.
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公开(公告)号：US20190334530A1
公开(公告)日：2019-10-31
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：US20200183439A1
公开(公告)日：2020-06-11
申请号：US16694028
申请日：2019-11-25
Applicant: STMicroelectronics International N.V.
Inventor： Ankit GUPTA , Nitin GUPTA , Prashutosh GUPTA
Abstract: A voltage regulator includes an error amplifier producing an error voltage from a reference voltage and a feedback voltage. A voltage-to-current converter converts the error voltage to an output current, and a feedback resistance generates the feedback voltage from the output current. The error amplifier includes a differential pair of transistors receiving the feedback voltage and the reference voltage, a first pair of transistors operating in saturation and coupled to the differential pair of transistors at an output node and a bias node, a second pair of transistors operating in a linear region and coupled to the first pair of transistors at a pair of intermediate nodes. A compensation capacitor is coupled to one of the pair of intermediate nodes so as to compensate the error amplifier for a parasitic capacitance. An output at the output node is a function of a difference between the reference voltage and feedback voltage.
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公开(公告)号：US20200076437A1
公开(公告)日：2020-03-05
申请号：US16674207
申请日：2019-11-05
Applicant: STMicroelectronics International N.V.
Inventor： Anand KUMAR , Nitin GUPTA , Nitin JAIN
Abstract: A circuit includes a frequency detector generating a comparison signal as a function of a comparison between a reference signal and a feedback signal. An oscillator generates an output signal as a function of the comparison signal. A frequency divider, in operation, divides the output signal by a division value to produce the feedback signal as having a frequency that is a multiple of a frequency of the reference signal. A frequency counter circuit measures the frequency of the reference signal and generates a count signal based thereupon. A control circuit adjusts the division value used by the frequency divider, in operation, based upon the count signal.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20190113943A1
公开(公告)日：2019-04-18
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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7.发明申请AUTOMATIC POWER SWITCHING AND POWER HARVESTING IN THIN OXIDE OPEN DRAIN TRANSMITTER CIRCUITS, SYSTEMS, AND METHODS 有权在氧化物开放式漏电断路器电路，系统和方法中的自动电源开关和电力采集公开(公告)号：US20150341017A1
公开(公告)日：2015-11-26
申请号：US14283043
申请日：2014-05-20
Applicant: STMICROELECTRONICS INTERNATIONAL N.V.
Inventor： Nitin GUPTA , Paramjeet Singh SAHNI , Tapas NANDY , Manish GARG
CPC classification number: H03K3/01 , H03K19/018528 , H04N5/44 , H04N5/63
Abstract: A power harvesting circuit includes a new transmitter topology that ensures that no junction of thin oxide transistors forming the power harvesting circuit will experience a voltage across junctions of the transistors that is more than a maximum tolerable junction voltage. A supplemental power feed circuit operates to provide a supplemental feed current to components in a transmitter circuit when power harvested from a receiver circuit is insufficient to adequately power these components of the transmitter circuit, which may occur during high frequency operation of communications channels coupling the transmitter and receiver circuits. The supplemental power feed circuit also operates to sink a shunt current when power harvested from the receiver circuit is more than is needed to power the components in the transmitter circuit.
Abstract translation: 功率收集电路包括新的发射机拓扑结构，其确保形成功率收集电路的薄氧化物晶体管的结不会经受超过最大可容忍结电压的晶体管结的电压。 补充供电电路用于在从接收器电路收集的功率不足以对发射机电路的这些组件充分供电时，向发射机电路中的组件提供补充馈电电流，这可能在耦合发射机的通信信道的高频操作期间发生 和接收器电路。 当从接收器电路收集的功率大于为发射机电路中的组件供电所需的功率时，辅助馈电电路还用于吸收分流电流。
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公开(公告)号：US20140247035A1
公开(公告)日：2014-09-04
申请号：US13784681
申请日：2013-03-04
Applicant: STMicroelectronics International N.V.
Inventor： Nitin GUPTA , Abhirup LAHIRI
IPC: G05F3/02
Abstract: A current mirror circuit provides a current to drive a load. A noise cancelling circuit is provided to keep the load current constant in spite of variations in the supply voltage. The noise cancelling circuit includes an auxiliary current path which branches from the load current path. The length-to-width ratios of transistors of the circuit are selected to provide the desired noise cancellation while maintaining device stability.
Abstract translation: 电流镜电路提供电流来驱动负载。 提供噪声消除电路以保持负载电流恒定，尽管电源电压的变化。 噪声消除电路包括从负载电流路径分支的辅助电流路径。 选择电路的晶体管的长宽比来提供期望的噪声消除，同时保持器件的稳定性。
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公开(公告)号：US20190334509A1
公开(公告)日：2019-10-31
申请号：US15962089
申请日：2018-04-25
Applicant: STMicroelectronics International N.V.
Inventor： Nitin GUPTA , Nitin JAIN
Abstract: A ring oscillator circuit is formed by series connected inverter circuits with a feedback loop. The inverter circuits are source biased with an oscillator voltage. A resistor-less bias current generator circuit generates a bias current for application to a replica inverter circuit to generate a bias voltage. A scaling circuit operates to scale the bias voltage by a selectable scaling factor to generate the oscillator voltage in a manner which balances a mobility effect of the inverter circuits within the ring oscillator circuit against a threshold voltage effect of the inverter circuits within the ring oscillator circuit. The clock signal output from the ring oscillator circuit has a frequency which is independent of process, voltage and temperature (PVT) spread.
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公开(公告)号：US20150370281A1
公开(公告)日：2015-12-24
申请号：US14839693
申请日：2015-08-28
Applicant: STMicroelectronics International N.V.
Inventor： Nitin GUPTA , Abhirup LAHIRI
IPC: G05F3/26
Abstract: A current mirror circuit provides a current to drive a load. A noise cancelling circuit is provided to keep the load current constant in spite of variations in the supply voltage. The noise cancelling circuit includes an auxiliary current path which branches from the load current path. The length-to-width ratios of transistors of the circuit are selected to provide the desired noise cancellation while maintaining device stability.
Abstract translation: 电流镜电路提供电流来驱动负载。 提供噪声消除电路以保持负载电流恒定，尽管电源电压的变化。 噪声消除电路包括从负载电流路径分支的辅助电流路径。 选择电路的晶体管的长宽比来提供期望的噪声消除，同时保持器件的稳定性。
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