公开(公告)号：US20130272688A1

公开(公告)日：2013-10-17

申请号：US13840032

申请日：2013-03-15

Applicant: AMS AG

Inventor： Peter TRATTLER ,  Karl Georg Waser

IPC: G03B15/05

CPC classification number: G03B15/05 ,  H05B33/0815 ,  H05B33/0824 ,  Y02B20/347

Abstract: A flash driver to limit a load current for a flash comprises a dc/dc converter (DCDC) having a first input (IN1) to receive an input voltage (Vin) and an output (OUT) to supply an output voltage (Vout). The dc/dc converter is designed to convert the input voltage (Vin) to the output voltage (Vout). Furthermore the flash driver has an adjustable current source (Iadj) connected between the output (OUT) and a load terminal (LT). A first control unit (CTRL—1) is connected to the first input (IN1) and coupled to the adjustable current source (Iadj), and is designed to compare the input voltage (Vin) to a threshold (Vth) and, if the comparison indicates the input voltage (Vin) being smaller than the threshold value (Vth), adjust the adjustable current source (Iadj) such that the input voltage (Vin) is equal or greater than the threshold value (Vth). A second control unit (CTRL—2) is coupled to the adjustable current source (Iadj) and the dc/dc converter (DCDC) and is designed to detect a voltage drop over the adjustable current source (Iadj) and to set the dc/dc converter (DCDC) to control the conversion of input voltage (Vin) to the output voltage (Vout) depending on the detected voltage drop.

Abstract translation: 用于限制闪光灯的负载电流的闪光驱动器包括具有接收输入电压（Vin）的第一输入（IN1）和用于提供输出电压（Vout）的输出（OUT）的DC / DC转换器（DCDC）。 DC / DC转换器用于将输入电压（Vin）转换为输出电压（Vout）。 此外，闪存驱动器具有连接在输出（OUT）和负载端子（LT）之间的可调电流源（Iadj）。 第一控制单元（CTRL-1）连接到第一输入端（IN1）并耦合到可调电流源（Iadj），并被设计为将输入电压（Vin）与阈值（Vth）进行比较，如果 比较表示输入电压（Vin）小于阈值（Vth），调节可调电流源（Iadj），使得输入电压（Vin）等于或大于阈值（Vth）。 第二控制单元（CTRL-2）耦合到可调电流源（Iadj）和dc / dc转换器（DCDC），并被设计成检测可调电流源（Iadj）上的电压降，并设置直流/ DC转换器（DCDC），以根据检测到的电压降来控制输入电压（Vin）到输出电压（Vout）的转换。

公开(公告)号：US11344234B2

公开(公告)日：2022-05-31

申请号：US16614457

申请日：2018-05-15

Applicant: ams AG

Inventor： Peter Trattler ,  Karl Georg Waser ,  Herbert Lenhard

IPC: A61B5/1455 ,  A61B5/00 ,  G01J1/44 ,  G01J1/42

Abstract: A circuit arrangement for an optical monitoring system comprises a driver circuit which is configured to generate at least one driving signal for driving the light source. A detector terminal is arranged for receiving a detector current from an optical detector. A gain stage is connected at its input side to the driver circuit for receiving the driving signal and generates a noise signal depending on the driving signal. A processing unit is configured to generate an output signal depending on the detector current and the noise signal.

公开(公告)号：US20200178865A1

公开(公告)日：2020-06-11

申请号：US16614457

申请日：2018-05-15

Applicant: ams AG

Inventor： Peter Trattler ,  Karl Georg Waser ,  Herbert Lenhard

IPC: A61B5/1455 ,  A61B5/00 ,  G01J1/44

Abstract: A circuit arrangement for an optical monitoring system comprises a driver circuit which is configured to generate at least one driving signal for driving the light source. A detector terminal is arranged for receiving a detector current from an optical detector. A gain stage is connected at its input side to the driver circuit for receiving the driving signal and generates a noise signal depending on the driving signal. A processing unit is configured to generate an output signal depending on the detector current and the noise signal.

公开(公告)号：US08981653B2

公开(公告)日：2015-03-17

申请号：US13840032

申请日：2013-03-15

Applicant: ams AG

Inventor： Peter Trattler ,  Karl Georg Waser

IPC: H05B41/00 ,  H05B41/30 ,  H05B41/16 ,  H05B41/36 ,  G05F1/00 ,  G03B7/26 ,  G03B15/05 ,  H05B33/08

CPC classification number: G03B15/05 ,  H05B33/0815 ,  H05B33/0824 ,  Y02B20/347

Abstract: A flash driver to limit a load current for a flash comprises a dc/dc converter (DCDC) having a first input (IN1) to receive an input voltage (Vin) and an output (OUT) to supply an output voltage (Vout). The dc/dc converter is designed to convert the input voltage (Vin) to the output voltage (Vout). Furthermore the flash driver has an adjustable current source (Iadj) connected between the output (OUT) and a load terminal (LT). A first control unit (CTRL—1) is connected to the first input (IN1) and coupled to the adjustable current source (Iadj), and is designed to compare the input voltage (Vin) to a threshold (Vth) and, if the comparison indicates the input voltage (Vin) being smaller than the threshold value (Vth), adjust the adjustable current source (Iadj) such that the input voltage (Vin) is equal or greater than the threshold value (Vth). A second control unit (CTRL—2) is coupled to the adjustable current source (Iadj) and the dc/dc converter (DCDC) and is designed to detect a voltage drop over the adjustable current source (Iadj) and to set the dc/dc converter (DCDC) to control the conversion of input voltage (Vin) to the output voltage (Vout) depending on the detected voltage drop.

Abstract translation: 用于限制闪光灯的负载电流的闪光驱动器包括具有接收输入电压（Vin）的第一输入（IN1）和用于提供输出电压（Vout）的输出（OUT）的DC / DC转换器（DCDC）。 DC / DC转换器用于将输入电压（Vin）转换为输出电压（Vout）。 此外，闪存驱动器具有连接在输出（OUT）和负载端子（LT）之间的可调电流源（Iadj）。 第一控制单元（CTRL-1）连接到第一输入端（IN1）并耦合到可调电流源（Iadj），并被设计为将输入电压（Vin）与阈值（Vth）进行比较，如果 比较表示输入电压（Vin）小于阈值（Vth），调节可调电流源（Iadj），使得输入电压（Vin）等于或大于阈值（Vth）。 第二控制单元（CTRL-2）耦合到可调电流源（Iadj）和dc / dc转换器（DCDC），并被设计成检测可调电流源（Iadj）上的电压降，并设置直流/ DC转换器（DCDC），以根据检测到的电压降来控制输入电压（Vin）到输出电压（Vout）的转换。