公开(公告)号：US20080174354A1

公开(公告)日：2008-07-24

申请号：US11757497

申请日：2007-06-04

Applicant: Kuo-Cheng Yu ,  Tyng-Yuan Luh

Inventor： Kuo-Cheng Yu ,  Tyng-Yuan Luh

IPC: G06F1/04

CPC classification number: G06F1/04

Abstract: A clock generating circuit and method therefor are provided, which includes a control unit, a first oscillating module, a second oscillating module, a status control unit, and a multiplexer. The control unit is used for outputting a first control signal and a second control signal so as to drive the first oscillating module and the second oscillating module to generate or stop from a first clock signal and a second signal to the multiplexer. The status control unit is used for judging whether the second clock signal approaches a stable state, for controlling the multiplexer to output selectively the first clock signal or the second clock signal so as to maintain the stable state of a clock outputting by the multiplexer for all the time

Abstract translation: 提供了一种时钟发生电路及其方法，其包括控制单元，第一振荡模块，第二振荡模块，状态控制单元和多路复用器。 控制单元用于输出第一控制信号和第二控制信号，以驱动第一振荡模块和第二振荡模块从第一时钟信号和第二信号产生或停止到多路复用器。 状态控制单元用于判断第二时钟信号是否接近稳定状态，用于控制多路复用器选择性地输出第一时钟信号或第二时钟信号，以便保持由多路复用器输出的时钟的稳定状态 时间

公开(公告)号：US5748948A

公开(公告)日：1998-05-05

申请号：US526850

申请日：1995-09-11

Applicant: Kuo-Cheng Yu ,  Bao-Shiang Sun ,  Ching-Yi Lin

Inventor： Kuo-Cheng Yu ,  Bao-Shiang Sun ,  Ching-Yi Lin

IPC: G06F1/24 ,  G06F11/00 ,  G06F1/04

CPC classification number: G06F11/0757 ,  G06F1/24

Abstract: The present invention relates to a reset signal generator adapted to be used with a microprocessor for generating a reset signal to initialize the microprocessor, which includes an oscillator to generate a fixed clock signal, a counter electrically connected to the oscillator for generating a cyclic signal in response to the fixed clock signal and outputting the reset signal at an end of a period of the cyclic signal, and a clear signal generating device electrically connected to the counter and outputting a clear signal for the counter in response to an output signal from the microprocessor. The present invention ensures that when the microprocessor is abnormal or down it will be initialized by the reset signal.

Abstract translation: 本发明涉及一种复位信号发生器，其适用于与微处理器一起产生复位信号以初始化微处理器，该微处理器包括产生固定时钟信号的振荡器，与振荡器电连接以产生循环信号的计数器 响应于固定时钟信号并在循环信号的周期结束时输出复位信号;以及清零信号发生装置，电连接到计数器，并响应于来自微处理器的输出信号输出计数器的清除信号 。 本发明确保当微处理器异常或下降时，它将被复位信号初始化。

公开(公告)号：US5847587A

公开(公告)日：1998-12-08

申请号：US779430

申请日：1997-01-07

Applicant: Jason Chen ,  Yi Lin ,  Kuo-Cheng Yu

Inventor： Jason Chen ,  Yi Lin ,  Kuo-Cheng Yu

IPC: G01R19/165 ,  G06F1/28 ,  G06F1/30 ,  H03K17/22

CPC classification number: G06F1/30 ,  G01R19/16528 ,  G06F1/28

Abstract: A voltage detector circuit for instantaneously detecting abnormal voltages in a micro controller includes a voltage detection circuit connected between the power supply and reset voltage ends of an internal circuit of the micro controller so as to instantaneously detect changes in the power supply, without the time delay associated with the external low pass filter that supplies the reset voltage. The detecting circuit is a logic "NOT" gate which has a power supply connecting end connected to a reset voltage end of the internal circuit, an input end connected to the power supply end of the internal circuit, and an output end connected to a cooperating input end of the latch circuit, so that the latch circuit latches a signal output by the voltage detector whenever an abnormal power supply voltage is detected, and outputs a flag signal to the micro controller to effect an instantaneous reset of the micro controller. The latch may be a flip-flop, in which case one of the flip-flop inputs is connected to the voltage detector output and the other input may be connected together with the flip-flop power supply input to the reset voltage, the flip-flop providing two outputs, one of which may be connected to the micro controller reset pin, and the other of which may be connected to an interrupt or other indicator device.

Abstract translation: 用于瞬时检测微控制器中的异常电压的电压检测器电路包括连接在微控制器的内部电路的电源和复位电压端之间的电压检测电路，以便瞬时检测电源的变化，而不需要延时 与提供复位电压的外部低通滤波器相关联。 检测电路是逻辑“NOT”门，其具有连接到内部电路的复位电压端的电源连接端，连接到内部电路的电源端的输入端和连接到内部电路的输出端 锁存电路的输入端，使得当检测到异常电源电压时，锁存电路锁存由电压检测器输出的信号，并且向微控制器输出标志信号以实现微控制器的瞬时复位。 闩锁可以是触发器，在这种情况下，触发器输入中的一个连接到电压检测器输出，另一个输入可以与触发器电源输入连接到复位电压， 提供两个输出，其中一个可以连接到微控制器复位引脚，另一个可以连接到中断或其他指示器。

公开(公告)号：US5770952A

公开(公告)日：1998-06-23

申请号：US489778

申请日：1995-06-13

Applicant: Kuo-Cheng Yu

Inventor： Kuo-Cheng Yu

IPC: H03K21/02 ,  H03K5/135

CPC classification number: H03K21/026

Abstract: A timer which provides both the surveying and counting functions. It contains a counter, a multiplexer, an edge-triggered controller, a time-base latching circuit, and a pulse-detecting circuit. It not only can be used as a timer, but can also be used as a counter to count the number of the external signals so as to detect the width of an external signal.

Abstract translation: 一个提供测量和计数功能的计时器。 它包含计数器，多路复用器，边沿触发控制器，时基锁存电路和脉冲检测电路。 它不仅可以用作定时器，还可以用作计数器来计数外部信号的数量，以便检测外部信号的宽度。