公开(公告)号：US08558530B2

公开(公告)日：2013-10-15

申请号：US13110317

申请日：2011-05-18

Applicant: Srinivas K. Pulijala ,  Scott C. McLeod

Inventor： Srinivas K. Pulijala ,  Scott C. McLeod

IPC: G05F3/16

CPC classification number: G05F1/56

Abstract: A voltage regulator may derive current from a bias circuitry having a constant-transconductance. The bias circuitry may generate the bias current using three NMOS devices. The temperature coefficient of the bias current may be within a specified, desired range. The bias current may be mirrored to low-power regulator circuitry to bias a diode-connected transistor in the low-power regulator circuitry to operate in the strong inversion region. A ratioed current based on the output load current may be injected into a bipolar junction transistor (BJT) device to cause the gate-source voltage (VGS) of the diode-connected device to track the VGS of the output transistor of the voltage regulator, to ensure tighter load regulation. By operating the diode-connected transistor in strong inversion, by maintaining its (VGS) constant over temperature, and by cancelling the VGS of the output transistor of the voltage regulator with the base-emitter voltage (VBE) of the BJT device, the regulated voltage output may become free of the effects of temperature and supply voltage.

Abstract translation: 电压调节器可以从具有恒定跨导的偏置电路获得电流。 偏置电路可以使用三个NMOS器件产生偏置电流。 偏置电流的温度系数可以在规定的期望范围内。 偏置电流可以被镜像到低功率调节器电路，以将低功率调节器电路中的二极管连接的晶体管偏置以在强反转区域中操作。 基于输出负载电流的比电流可以被注入到双极结型晶体管（BJT）器件中，以使二极管连接的器件的栅源电压（VGS）跟踪电压调节器的输出晶体管的VGS， 以确保更严格的负载调节。 通过在强反转中操作二极管连接的晶体管，通过使其（VGS）的温度保持恒定，并且通过用BJT器件的基极 - 发射极电压（VBE）消除电压调节器的输出晶体管的VGS， 电压输出可能没有温度和电源电压的影响。

公开(公告)号：US20130187895A1

公开(公告)日：2013-07-25

申请号：US13354362

申请日：2012-01-20

Applicant: Miroslav Oljaca ,  Srinivas K. Pulijala

Inventor： Miroslav Oljaca ,  Srinivas K. Pulijala

IPC: G06F3/041

CPC classification number: G06F3/0416

Abstract: The present disclosure discloses methods and systems for improving touch detection of a touch screen device. The method includes determining touch coordinates when the touch screen device is touched. Subsequently, a sampling time is adjusted, depending on the touch coordinates relative to initial coordinates of the touch screen device.

Abstract translation: 本公开公开了用于改善触摸屏设备的触摸检测的方法和系统。 该方法包括当触摸屏设备被触摸时确定触摸坐标。 随后，根据相对于触摸屏设备的初始坐标的触摸坐标来调整采样时间。

公开(公告)号：US07893670B2

公开(公告)日：2011-02-22

申请号：US12389581

申请日：2009-02-20

Applicant: Srinivas K. Pulijala ,  Scott C. McLeod

Inventor： Srinivas K. Pulijala ,  Scott C. McLeod

IPC: G05F1/00

CPC classification number: G05F1/575

Abstract: A voltage regulator may comprise a regulator output configured to provide a regulated voltage, which may be controlled by an error amplifier based on the regulated voltage and a reference voltage. The error amplifier may control a source-follower stage to mirror a multiple of the current flowing in the source-follower stage into an internal pass device. A voltage developed by the mirror current may control an external pass device configured to deliver the load current into the regulator output. A first resistor may be configured to decouple a load capacitor coupled between the regulator output and reference ground, when the load current is below a specified value. A second resistor may be configured to create a bias current in the internal pass device even when the external pass device is close to cut-off region. A third resistor may be configured to counter the effects of negative impedance at the control terminal of the external pass device caused by the current-gain of the external pass device. A compensation capacitor and resistor may be coupled in series between the output of the error amplifier and the output of the voltage regulator to provide frequency compensation for the Miller-Effect.

Abstract translation: 电压调节器可以包括被配置为提供调节电压的调节器输出，其可以由基于调节电压和参考电压的误差放大器控制。 误差放大器可以控制源极跟随器级将在源极跟随器级中流动的电流的倍数镜像成内部通过器件。 由反射镜电流产生的电压可以控制配置成将负载电流传递到调节器输出中的外部通过装置。 当负载电流低于规定值时，第一电阻器可以被配置为去耦耦合在调节器输出端和参考地之间的负载电容器。 第二电阻器可以被配置为在内部通路器件中产生偏置电流，即使当外部通过器件接近截止区域时。 第三电阻器可以被配置为对抗由外部通过器件的电流增益引起的外部通过器件的控制端子处的负阻抗的影响。 补偿电容器和电阻器可以串联耦合在误差放大器的输出端和电压调节器的输出端之间，为米勒效应提供频率补偿。

公开(公告)号：US08624766B2

公开(公告)日：2014-01-07

申请号：US13307022

申请日：2011-11-30

Applicant: Srinivas K. Pulijala

Inventor： Srinivas K. Pulijala

IPC: H03M1/00

CPC classification number: H03G3/30 ,  H03G3/001 ,  H03M1/183

Abstract: Embodiments of the present disclosure provide a method and system for an auto-ranging analog-to-digital converter (ADC) for dynamically scaling inputs to an ADC. The auto-ranging ADC includes a dynamically configurable transistor arrangement for delivering a load current and a replica device for replicating the load current. A current sense resistor generates a replicated load voltage based on the replicated current. The ADC generates a digital value based on the replicated load voltage. The auto-ranging ADC also includes an auto-ranging controller for dynamically configuring the transistor arrangement based on the digital value to scale the inputs to the ADC.

Abstract translation: 本公开的实施例提供了一种用于动态地缩放对ADC的输入的自动量程模数转换器（ADC）的方法和系统。 自动量程ADC包括用于传送负载电流的动态可配置晶体管布置和用于复制负载电流的复制设备。 电流检测电阻基于复制电流产生复制的负载电压。 ADC根据复制的负载电压产生数字值。 自动量程ADC还包括一个自动量程控制器，用于根据数字值动态配置晶体管布置，以将输入缩放到ADC。

公开(公告)号：US20110291625A1

公开(公告)日：2011-12-01

申请号：US13110317

申请日：2011-05-18

Applicant: Srinivas K. Pulijala ,  Scott C. McLeod

Inventor： Srinivas K. Pulijala ,  Scott C. McLeod

IPC: G05F1/10

CPC classification number: G05F1/56

Abstract: A voltage regulator may derive current from a bias circuitry having a constant-transconductance. The bias circuitry may generate the bias current using three NMOS devices. The temperature coefficient of the bias current may be within a specified, desired range. The bias current may be mirrored to low-power regulator circuitry to bias a diode-connected transistor in the low-power regulator circuitry to operate in the strong inversion region. A ratioed current based on the output load current may be injected into a bipolar junction transistor (BJT) device to cause the gate-source voltage (VGS) of the diode-connected device to track the VGS of the output transistor of the voltage regulator, to ensure tighter load regulation. By operating the diode-connected transistor in strong inversion, by maintaining its (VGS) constant over temperature, and by cancelling the VGS of the output transistor of the voltage regulator with the base-emitter voltage (VBE) of the BJT device, the regulated voltage output may become free of the effects of temperature and supply voltage.

Abstract translation: 电压调节器可以从具有恒定跨导的偏置电路获得电流。 偏置电路可以使用三个NMOS器件产生偏置电流。 偏置电流的温度系数可以在规定的期望范围内。 偏置电流可以被镜像到低功率调节器电路，以将低功率调节器电路中的二极管连接的晶体管偏置以在强反转区域中操作。 基于输出负载电流的比电流可以被注入到双极结型晶体管（BJT）器件中，以使二极管连接的器件的栅源电压（VGS）跟踪电压调节器的输出晶体管的VGS， 以确保更严格的负载调节。 通过在强反转中操作二极管连接的晶体管，通过使其（VGS）的温度保持恒定，并且通过用BJT器件的基极 - 发射极电压（VBE）消除电压调节器的输出晶体管的VGS， 电压输出可能没有温度和电源电压的影响。

公开(公告)号：US20100176875A1

公开(公告)日：2010-07-15

申请号：US12353843

申请日：2009-01-14

Applicant: Srinivas K. Pulijala ,  Paul F. Illegems

Inventor： Srinivas K. Pulijala ,  Paul F. Illegems

IPC: G05F1/10

CPC classification number: G05F1/575

Abstract: An electronic circuit may comprise an input stage powered by a supply voltage and configured to receive a reference signal. The circuit may further comprise an output stage powered by the supply voltage and coupled to the input stage, and configured to generate an error signal based on: the reference signal, and a feedback signal based on an output signal. The circuit may also include a pass transistor powered by the supply voltage and configured to generate the output signal based on the error signal. A capacitor coupled between the supply voltage and the output stage may increase the current flowing in the output stage, resulting in the output stage conducting current even during a rising edge of the supply voltage, preventing the output signal from reaching the level of the supply voltage during the rising edge of the supply voltage.

Abstract translation: 电子电路可以包括由电源电压供电并被配置为接收参考信号的输入级。 电路还可以包括由电源电压供电并耦合到输入级的输出级，并且被配置为基于：参考信号和基于输出信号的反馈信号来产生误差信号。 电路还可以包括由电源电压供电并被配置为基于误差信号产生输出信号的传输晶体管。 耦合在电源电压和输出级之间的电容器可以增加在输出级中流动的电流，导致即使在电源电压的上升沿期间输出级也导通电流，从而防止输出信号达到电源电压 在电源电压的上升沿。

公开(公告)号：US09152270B2

公开(公告)日：2015-10-06

申请号：US13354362

申请日：2012-01-20

Applicant: Miroslav Oljaca ,  Srinivas K. Pulijala

Inventor： Miroslav Oljaca ,  Srinivas K. Pulijala

IPC: G06F3/041

CPC classification number: G06F3/0416

Abstract: The present disclosure discloses methods and systems for improving touch detection of a touch screen device. The method includes determining touch coordinates when the touch screen device is touched. Subsequently, a sampling time is adjusted, depending on the touch coordinates relative to initial coordinates of the touch screen device.

Abstract translation: 本公开公开了用于改善触摸屏设备的触摸检测的方法和系统。 该方法包括当触摸屏设备被触摸时确定触摸坐标。 随后，根据相对于触摸屏设备的初始坐标的触摸坐标来调整采样时间。

公开(公告)号：US20130135130A1

公开(公告)日：2013-05-30

申请号：US13307022

申请日：2011-11-30

Applicant: Srinivas K. Pulijala

Inventor： Srinivas K. Pulijala

IPC: H03M1/38

CPC classification number: H03G3/30 ,  H03G3/001 ,  H03M1/183

Abstract: Embodiments of the present disclosure provide a method and system for an auto-ranging analog-to-digital converter (ADC) for dynamically scaling inputs to an ADC. The auto-ranging ADC includes a dynamically configurable transistor arrangement for delivering a load current and a replica device for replicating the load current. A current sense resistor generates a replicated load voltage based on the replicated current. The ADC generates a digital value based on the replicated load voltage. The auto-ranging ADC also includes an auto-ranging controller for dynamically configuring the transistor arrangement based on the digital value to scale the inputs to the ADC.

Abstract translation: 本公开的实施例提供了一种用于动态地缩放对ADC的输入的自动量程模数转换器（ADC）的方法和系统。 自动量程ADC包括用于传送负载电流的动态可配置晶体管布置和用于复制负载电流的复制设备。 电流检测电阻基于复制电流产生复制的负载电压。 ADC根据复制的负载电压产生数字值。 自动量程ADC还包括一个自动量程控制器，用于根据数字值动态配置晶体管布置，以将输入缩放到ADC。

公开(公告)号：US08203392B2

公开(公告)日：2012-06-19

申请号：US11844487

申请日：2007-08-24

Applicant: Paul F. Illegems ,  Srinivas K. Pulijala

Inventor： Paul F. Illegems ,  Srinivas K. Pulijala

IPC: H03L1/00

CPC classification number: H03K3/03 ,  H03K3/011 ,  H03L1/00

Abstract: A circuit may comprise an amplifier powered by a first supply voltage, with a first input of the amplifier coupled to a stable reference voltage, and the output voltage of the amplifier provided as a designated supply voltage to an oscillator configured to produce a periodic signal having a specified frequency. The circuit may further include a control circuit coupled to a second input of the amplifier, to the output of the amplifier, and to ground, and configured to control the rate of change of the output voltage of the amplifier with respect to temperature. This rate of change may be specified according to a characterization of the oscillator over supply voltage and temperature, and may result in stabilizing the specified frequency across temperature. The periodic signal may therefore be unaffected by variations in the first supply voltage, and the amplitude of the periodic signal may be proportional to the stable reference voltage.

Abstract translation: 电路可以包括由第一电源电压供电的放大器，放大器的第一输入耦合到稳定的参考电压，并且将放大器的输出电压作为指定的电源电压提供给被配置为产生具有 指定频率。 电路还可以包括耦合到放大器的第二输入端，放大器的输出端和接地端的控制电路，并配置成控制放大器的输出电压相对于温度的变化率。 这种变化率可以根据振荡器在电源电压和温度上的表征来指定，并且可能导致在温度上稳定指定的频率。 因此，周期信号不受第一电源电压的变化的影响，周期信号的幅度可以与稳定的参考电压成比例。

公开(公告)号：US20090051443A1

公开(公告)日：2009-02-26

申请号：US11844487

申请日：2007-08-24

Applicant: Paul F. Illegems ,  Srinivas K. Pulijala

Inventor： Paul F. Illegems ,  Srinivas K. Pulijala

IPC: H03L1/02 ,  H03K3/03

CPC classification number: H03K3/03 ,  H03K3/011 ,  H03L1/00

Abstract: A circuit may comprise an amplifier powered by a first supply voltage, with a first input of the amplifier coupled to a stable reference voltage, and the output voltage of the amplifier provided as a designated supply voltage to an oscillator configured to produce a periodic signal having a specified frequency. The circuit may further include a control circuit coupled to a second input of the amplifier, to the output of the amplifier, and to ground, and configured to control the rate of change of the output voltage of the amplifier with respect to temperature. This rate of change may be specified according to a characterization of the oscillator over supply voltage and temperature, and may result in stabilizing the specified frequency across temperature. The periodic signal may therefore be unaffected by variations in the first supply voltage, and the amplitude of the periodic signal may be proportional to the stable reference voltage.

Abstract translation: 电路可以包括由第一电源电压供电的放大器，放大器的第一输入耦合到稳定的参考电压，并且将放大器的输出电压作为指定的电源电压提供给被配置为产生具有 指定频率。 电路还可以包括耦合到放大器的第二输入端，放大器的输出端和接地端的控制电路，并配置成控制放大器的输出电压相对于温度的变化率。 这种变化率可以根据振荡器在电源电压和温度上的表征来指定，并且可能导致在温度上稳定指定的频率。 因此，周期信号不受第一电源电压的变化的影响，周期信号的幅度可以与稳定的参考电压成比例。