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公开(公告)号：US11713998B2
公开(公告)日：2023-08-01
申请号：US17663915
申请日：2022-05-18
Inventor： Nicolas Moeneclaey , Sri Ram Gupta , Sarika Kushwaha
CPC classification number: G01J1/4204 , G01J1/44 , G01J2001/446
Abstract: According to one aspect, an ambient-light sensor includes a photodiode configured to generate an electrical signal according to an ambient light, a capacitive-feedback transimpedance amplifier connected at its input to the photodiode for receiving a signal generated by the photodiode and for generating as an output an amplified signal from the signal generated by the photodiode, and an auto-zero switch at the input of the capacitive-feedback transimpedance amplifier. The ambient-light sensor further includes a control circuit including a bootstrap circuit configured to receive an initial positive- or zero-voltage logic control signal, and then generate, from this initial logic control signal, an adapted logic control signal having a first positive voltage level and a second negative voltage control level for controlling the auto-zero switch.
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Patent Agency Ranking
2.发明授权公开(公告)号：US11463098B2
公开(公告)日：2022-10-04
申请号：US17342416
申请日：2021-06-08
Applicant: STMICROELECTRONICS INTERNATIONAL N.V.
Inventor： Ankur Bal , Sri Ram Gupta , Rupesh Singh
Abstract: An integrated circuit includes a successive approximation register (SAR) analog-to-digital converter (ADC). The ADC includes a bit step selector. During testing of the ADC, the bit step selector selects a number of bits to be tested for a next analog test voltage based on digital values that are within an integer delta value of most recent digital value for a most recent analog test voltage.
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公开(公告)号：US09385593B2
公开(公告)日：2016-07-05
申请号：US14482714
申请日：2014-09-10
Applicant: STMicroelectronics International N.V.
Inventor： Shyam Somayajula , Sri Ram Gupta , Lionel Cimaz
CPC classification number: H02M3/07 , H02M2001/0032 , H02M2001/0035 , H03F3/187 , H03F3/45475 , H03F2200/03 , Y02B70/16
Abstract: A device may be associated with a power source. The device may include a charge pump configured to output a pulse-width modulated voltage based upon an input voltage from the power source, with the pulse-width modulated voltage varying between a first voltage and a second voltage. The device may also include a low-pass filter comprising an output capacitor, with the output capacitor being configured to average the pulsed-width modulated voltage and to output a filtered voltage having a value different than that of the input voltage. The device may further include a controller configured to selectively decouple the charge pump from the power source when a load imposed on the low-pass filter is below a threshold load.
Abstract translation: 设备可以与电源相关联。 该装置可以包括电荷泵，其被配置为基于来自电源的输入电压输出脉宽调制电压，其中脉宽调制电压在第一电压和第二电压之间变化。 器件还可以包括包括输出电容器的低通滤波器，输出电容器被配置为平均脉冲宽度调制电压并输出具有与输入电压值不同的值的滤波电压。 该装置还可以包括控制器，其被配置为当施加在低通滤波器上的负载低于阈值负载时，选择性地将电荷泵与电源分离。
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公开(公告)号：US11855654B2
公开(公告)日：2023-12-26
申请号：US17707113
申请日：2022-03-29
Inventor： Nicolas Moeneclaey , Sri Ram Gupta
CPC classification number: H03M1/462 , H03M1/122 , H03M1/1245 , H03M1/468
Abstract: A successive approximation analog-to-digital converter includes a digital-to-analog converter DAC configured to receive a digital signal. First conversion units of the DAC are configured to sample an analog signal via a first switch and provide a first level voltage. Each first conversion unit includes a first capacitor array and a first switch array controlled from the digital signal. A single second conversion unit of the DAC is configured to provide a second level voltage. The second conversion unit includes a second capacitor array and a second switch array. A comparator operates to compare each of the first level voltages to the second level voltage and to provide a comparison signal based on each comparison and actuation of a set of third switches. A control circuit closes the first switches simultaneously and closes the third switches successively for the conversion of each sampled analog signal.
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公开(公告)号：US20220373388A1
公开(公告)日：2022-11-24
申请号：US17663915
申请日：2022-05-18
Inventor： Nicolas Moeneclaey , Sri Ram Gupta , Sarika Kushwaha
Abstract: According to one aspect, an ambient-light sensor includes a photodiode configured to generate an electrical signal according to an ambient light, a capacitive-feedback transimpedance amplifier connected at its input to the photodiode for receiving a signal generated by the photodiode and for generating as an output an amplified signal from the signal generated by the photodiode, and an auto-zero switch at the input of the capacitive-feedback transimpedance amplifier. The ambient-light sensor further includes a control circuit including a bootstrap circuit configured to receive an initial positive- or zero-voltage logic control signal, and then generate, from this initial logic control signal, an adapted logic control signal having a first positive voltage level and a second negative voltage control level for controlling the auto-zero switch.
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公开(公告)号：US20150070090A1
公开(公告)日：2015-03-12
申请号：US14482714
申请日：2014-09-10
Applicant: STMicroelectronics International N.V.
Inventor： Shyam Somayajula , Sri Ram Gupta , Lionel Cimaz
CPC classification number: H02M3/07 , H02M2001/0032 , H02M2001/0035 , H03F3/187 , H03F3/45475 , H03F2200/03 , Y02B70/16
Abstract: A device may be associated with a power source. The device may include a charge pump configured to output a pulse-width modulated voltage based upon an input voltage from the power source, with the pulse-width modulated voltage varying between a first voltage and a second voltage. The device may also include a low-pass filter comprising an output capacitor, with the output capacitor being configured to average the pulsed-width modulated voltage and to output a filtered voltage having a value different than that of the input voltage. The device may further include a controller configured to selectively decouple the charge pump from the power source when a load imposed on the low-pass filter is below a threshold load.
Abstract translation: 设备可以与电源相关联。 该装置可以包括电荷泵，其被配置为基于来自电源的输入电压输出脉宽调制电压，其中脉宽调制电压在第一电压和第二电压之间变化。 器件还可以包括包括输出电容器的低通滤波器，输出电容器被配置为平均脉冲宽度调制电压并输出具有与输入电压值不同的值的滤波电压。 该装置还可以包括控制器，其被配置为当施加在低通滤波器上的负载低于阈值负载时，选择性地将电荷泵与电源分离。
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