公开(公告)号：US09354649B2

公开(公告)日：2016-05-31

申请号：US14171538

申请日：2014-02-03

Applicant: QUALCOMM Incorporated

Inventor： Ngai Yeung Ho ,  Liangguo Shen ,  Bing Liu ,  Vincenzo F Peluso

IPC: G05F1/565 ,  G05F3/30 ,  G05F1/575 ,  G05F1/56 ,  G05F1/618 ,  H03K19/0175

CPC classification number: G05F1/575 ,  G05F1/56 ,  G05F1/618 ,  H03K19/017518

Abstract: In one embodiment, a circuit includes a first transistor having a control terminal, a first terminal, and a second terminal where the first transistor is a first device type. The control terminal of the first transistor receives an input signal. The circuit also includes a second transistor having a control terminal, a first terminal, and a second terminal where the second transistor is a second device type. The control terminal of the second transistor is coupled to the second terminal of the first transistor. A voltage shift circuit has an input coupled to the first terminal of the first transistor and an output coupled to the first terminal of the second transistor and a voltage between the input of the voltage shift circuit and an output of the voltage shift circuit increases as a current from the output of the voltage shift circuit increases.

Abstract translation: 在一个实施例中，电路包括具有控制端子的第一晶体管，第一端子和第一晶体管是第一器件类型的第二端子。 第一晶体管的控制端子接收输入信号。 电路还包括具有控制端子，第一端子和第二端子的第二晶体管，其中第二晶体管是第二器件类型。 第二晶体管的控制端子耦合到第一晶体管的第二端子。 电压移位电路具有耦合到第一晶体管的第一端子的输入端和耦合到第二晶体管的第一端子的输出端，并且电压移位电路的输入端和电压移位电路的输出端之间的电压增加为 电压移位电路的输出电流增加。

公开(公告)号：US09271351B2

公开(公告)日：2016-02-23

申请号：US14171472

申请日：2014-02-03

Applicant: QUALCOMM Incorporated

Inventor： Troy Stockstad ,  Bing Liu ,  Joseph D. Rutkowski

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0845

Abstract: In one embodiment, a circuit comprises a current source to produce current to a light emitting diode array. An analog dimming circuit generates a continuous control signal to the current source to control the current in the light emitting diode array according to a range of control signal values when the control signal is above a threshold. Below the threshold, a digital modulation circuit generates an additional modulated digital signal to the current source to control the current in the light emitting diode array according to a range of modulation values when the continuous control signal is below the threshold. The continuous control signal produces current from the current source into the light emitting diode array above a first value. The combination of the continuous control signal and the modulated digital signal produces current in the light emitting diode array below the first value.

Abstract translation: 在一个实施例中，电路包括用于产生电流至发光二极管阵列的电流源。 当控制信号高于阈值时，模拟调光电路产生到电流源的连续控制信号以根据控制信号值的范围来控制发光二极管阵列中的电流。 低于阈值时，数字调制电路产生附加的调制数字信号到电流源，以在连续控制信号低于阈值时根据调制值的范围来控制发光二极管阵列中的电流。 连续控制信号从电流源产生高于第一值的电流至发光二极管阵列。 连续控制信号和调制数字信号的组合在发光二极管阵列中产生低于第一值的电流。

公开(公告)号：US09575498B2

公开(公告)日：2017-02-21

申请号：US14609155

申请日：2015-01-29

Applicant: QUALCOMM Incorporated

Inventor： Vincenzo Peluso ,  Bing Liu

IPC: G05F3/26 ,  G05F3/16 ,  G05F1/575

CPC classification number: G05F1/575 ,  G05F3/16 ,  G05F3/26 ,  G05F3/262

Abstract: The present disclosure includes circuits and methods for generating bleeding currents. In one embodiment, a pass transistor of a voltage regulator receives a voltage from a feedback circuit. A negative resistance circuit is coupled to a node to produce a bleeding current that turns on when needed and is otherwise off to save power. In one embodiment, the negative resistance circuit includes stacked current mirrors and a resistor. In another embodiment, the resistor has a first terminal that receives the voltage from the feedback circuit and a second terminal is coupled to a constant reference voltage that tracks the input voltage.

Abstract translation: 本发明包括用于产生出血电流的电路和方法。 在一个实施例中，电压调节器的传输晶体管从反馈电路接收电压。 负电阻电路耦合到节点以产生在需要时导通的出流电流，否则关闭以节省功率。 在一个实施例中，负电阻电路包括堆叠电流镜和电阻器。 在另一个实施例中，电阻器具有接收来自反馈电路的电压的第一端子，并且第二端子耦合到跟踪输入电压的恒定参考电压。

公开(公告)号：US20150223299A1

公开(公告)日：2015-08-06

申请号：US14171472

申请日：2014-02-03

Applicant: QUALCOMM Incorporated

Inventor： Troy Stockstad ,  Bing Liu ,  Joseph D. Rutkowski

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0845

Abstract: In one embodiment, a circuit comprises a current source to produce current to a light emitting diode array. An analog dimming circuit generates a continuous control signal to the current source to control the current in the light emitting diode array according to a range of control signal values when the control signal is above a threshold. Below the threshold, a digital modulation circuit generates an additional modulated digital signal to the current source to control the current in the light emitting diode array according to a range of modulation values when the continuous control signal is below the threshold. The continuous control signal produces current from the current source into the light emitting diode array above a first value. The combination of the continuous control signal and the modulated digital signal produces current in the light emitting diode array below the first value.

Abstract translation: 在一个实施例中，电路包括用于产生电流至发光二极管阵列的电流源。 当控制信号高于阈值时，模拟调光电路产生到电流源的连续控制信号以根据控制信号值的范围来控制发光二极管阵列中的电流。 低于阈值时，数字调制电路产生附加的调制数字信号到电流源，以在连续控制信号低于阈值时根据调制值的范围来控制发光二极管阵列中的电流。 连续控制信号从电流源产生高于第一值的电流至发光二极管阵列。 连续控制信号和调制数字信号的组合在发光二极管阵列中产生低于第一值的电流。

公开(公告)号：US20150220094A1

公开(公告)日：2015-08-06

申请号：US14171538

申请日：2014-02-03

Applicant: QUALCOMM Incorporated

Inventor： Ngai Yeung Ho ,  Liangguo Shen ,  Bing Liu ,  Vincenzo F. Peluso

IPC: G05F1/575

CPC classification number: G05F1/575 ,  G05F1/56 ,  G05F1/618 ,  H03K19/017518

Abstract: In one embodiment, a circuit includes a first transistor having a control terminal, a first terminal, and a second terminal where the first transistor is a first device type. The control terminal of the first transistor receives an input signal. The circuit also includes a second transistor having a control terminal, a first terminal, and a second terminal where the second transistor is a second device type. The control terminal of the second transistor is coupled to the second terminal of the first transistor. A voltage shift circuit has an input coupled to the first terminal of the first transistor and an output coupled to the first terminal of the second transistor and a voltage between the input of the voltage shift circuit and an output of the voltage shift circuit increases as a current from the output of the voltage shift circuit increases.

Abstract translation: 在一个实施例中，电路包括具有控制端子的第一晶体管，第一端子和第一晶体管是第一器件类型的第二端子。 第一晶体管的控制端子接收输入信号。 电路还包括具有控制端子，第一端子和第二端子的第二晶体管，其中第二晶体管是第二器件类型。 第二晶体管的控制端子耦合到第一晶体管的第二端子。 电压移位电路具有耦合到第一晶体管的第一端子的输入端和耦合到第二晶体管的第一端子的输出端，并且电压移位电路的输入端和电压移位电路的输出端之间的电压增加为 电压移位电路的输出电流增加。

公开(公告)号：US20160224040A1

公开(公告)日：2016-08-04

申请号：US14609155

申请日：2015-01-29

Applicant: QUALCOMM Incorporated

Inventor： Vincenzo Peluso ,  Bing Liu

IPC: G05F1/575

CPC classification number: G05F1/575 ,  G05F3/16 ,  G05F3/26 ,  G05F3/262

Abstract: The present disclosure includes circuits and methods for generating bleeding currents. In one embodiment, a pass transistor of a voltage regulator receives a voltage from a feedback circuit. A negative resistance circuit is coupled to a node to produce a bleeding current that turns on when needed and is otherwise off to save power. In one embodiment, the negative resistance circuit includes stacked current mirrors and a resistor. In another embodiment, the resistor has a first terminal that receives the voltage from the feedback circuit and a second terminal is coupled to a constant reference voltage that tracks the input voltage.

Abstract translation: 本发明包括用于产生出血电流的电路和方法。 在一个实施例中，电压调节器的传输晶体管从反馈电路接收电压。 负电阻电路耦合到节点以产生在需要时导通的出流电流，否则关闭以节省功率。 在一个实施例中，负电阻电路包括堆叠电流镜和电阻器。 在另一个实施例中，电阻器具有接收来自反馈电路的电压的第一端子，并且第二端子耦合到跟踪输入电压的恒定参考电压。