公开(公告)号：WO2016033420A9

公开(公告)日：2016-05-26

申请号：PCT/US2015047367

申请日：2015-08-28

Applicant: MICROCHIP TECH INC

Inventor： LOMBARDI CARLO ,  REITER ANDREAS ,  THALHEIMER FRANZ ,  ZIEGENHORN FRANK

IPC: H05B33/08

CPC classification number: H05B33/089 ,  B60Q1/0088 ,  B60Q1/34 ,  H05B33/083

Abstract: A light emitting diode (LED) running light comprises a current sink and a plurality of series coupled LED block cells; each of the plurality of LED block cells comprising a LED and a bypass circuit to the current sink, wherein each series coupled LED sequentially turns on (lights) when a voltage source increases by additive voltage increments of at least the turn-on voltage of each LED in the series coupled string until all LEDs are on (lit). The current sink maintains a desired current value through the LEDs and may also be used to provide waveforms for diagnostic and timing purposes

Abstract translation: 发光二极管（LED）行驶灯包括电流吸收器和多个串联耦合的LED块单元; 所述多个LED块单元中的每一个包括发光二极管和至所述电流吸收器的旁路电路，其中，当电压源增加至少各自的导通电压的加合电压增量时，每一串联耦合的LED顺序地导通（点亮） 串联LED中的所有LED都点亮（点亮）。 电流吸收器通过LED维持所需的电流值，也可用于提供用于诊断和定时目的的波形

公开(公告)号：WO2013078108A3

公开(公告)日：2013-08-22

申请号：PCT/US2012065774

申请日：2012-11-19

Applicant: MICROCHIP TECH INC

Inventor： DARYANANI SONU ,  ZIEGENHORN FRANK

IPC: H03L7/00

CPC classification number: H03L1/026 ,  G01R31/2824

Abstract: Precision measurement of a period(s) of an embedded clock oscillator using a charge time measurement unit (CTMU) maintains a desired frequency accuracy of the embedded clock oscillator over a range of time, temperature and operating condition changes. The CTMU determines the free running frequency of the embedded clock oscillator and provides very accurate frequency (period) information for confirmation that a desired frequency, e.g., within 0.25 percent of the desired frequency, is running or an indication of how much and which direction to adjustment the frequency of the clock oscillator to maintain the frequency precision desired. Automatic frequency adjustment of the embedded clock oscillator may be implemented so as to maintain the desired precision frequency thereof. Temperature and voltage compensation profiles for maintaining the accuracy of the CTMU may be stored in a table, e.g., nonvolatile memory, for a further improvement in absolute frequency accuracy of the embedded clock oscillator.

Abstract translation: 使用充电时间测量单元（CTMU）对嵌入式时钟振荡器的周期进行精确测量，可以在一定的时间范围，温度和工作条件变化范围内保持嵌入式时钟振荡器的期望频率精度。 CTMU确定嵌入式时钟振荡器的自由运行频率，并提供非常准确的频率（周期）信息，用于确认期望的频率（例如在期望频率的0.25％内）正在运行，或者指示多少以及向哪个方向 调整时钟振荡器的频率以保持所需的频率精度。 嵌入式时钟振荡器的自动频率调整可以被实施以便保持其期望的精确频率。 用于保持CTMU精确度的温度和电压补偿曲线可以存储在例如非易失性存储器的表格中，以进一步改善嵌入式时钟振荡器的绝对频率精度。

公开(公告)号：WO2013078108A2

公开(公告)日：2013-05-30

申请号：PCT/US2012065774

申请日：2012-11-19

Applicant: MICROCHIP TECH INC

Inventor： DARYANANI SONU ,  ZIEGENHORN FRANK

IPC: H03L7/00

CPC classification number: H03L1/026 ,  G01R31/2824

Abstract: Precision measurement of a period(s) of an embedded clock oscillator using a charge time measurement unit (CTMU) maintains a desired frequency accuracy of the embedded clock oscillator over a range of time, temperature and operating condition changes. The CTMU determines the free running frequency of the embedded clock oscillator and provides very accurate frequency (period) information for confirmation that a desired frequency, e.g., within 0.25 percent of the desired frequency, is running or an indication of how much and which direction to adjustment the frequency of the clock oscillator to maintain the frequency precision desired. Automatic frequency adjustment of the embedded clock oscillator may be implemented so as to maintain the desired precision frequency thereof. Temperature and voltage compensation profiles for maintaining the accuracy of the CTMU may be stored in a table, e.g., nonvolatile memory, for a further improvement in absolute frequency accuracy of the embedded clock oscillator.

Abstract translation: 使用充电时间测量单元（CTMU）对嵌入式时钟振荡器的周期进行精确测量在一段时间，温度和工作条件变化的范围内保持嵌入式时钟振荡器所需的频率精度。 CTMU确定嵌入式时钟振荡器的自由运行频率，并提供非常精确的频率（周期）信息，以确认所需频率（例如，所需频率的0.25％）正在运行或指示多少和哪个方向 调整时钟振荡器的频率以保持所需的频率精度。 可以实现嵌入式时钟振荡器的自动频率调整，以保持其期望的精度频率。 用于保持CTMU的精度的温度和电压补偿简档可以存储在诸如非易失性存储器的表中，以进一步提高嵌入式时钟振荡器的绝对频率精度。