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    • 5. 发明授权
    • Self-latching monostable circuit
    • 自锁单稳电路
    • US4843255A
    • 1989-06-27
    • US154814
    • 1988-02-10
    • Carlton Stuebing
    • Carlton Stuebing
    • H03K3/0232H03K4/50
    • H03K4/50H03K3/0232
    • A monostable circuit responsive conditionally to a circuit input signal for generating a circuit output signal having a pulse of a predetermined duration includes an AND gate having two input ports and an output port. ONe of the input ports is coupled to the circuit input signal and inverts that signal. The other of the input ports is coupled to the circuit output signal. A reset OR gate receives a reset signal and the output of the AND gate. When the reset signal is low, the reset OR gate outputs the output of the AND gate, thus enabling the curcuit. The output of the reset OR gate also goes to a ramp generator having a ramp capacitor, the charging current to which is provided by a current driver. The reference voltage for a comparator is provided by circuitry identical to that associated with the ramp capacitor except that an intermediate bias reference is applied to it. This bias reference is compensated for the effect temperature changes on the circuit. An external current source operating through a current mirror drives the capacitor current driver and the reference voltage. The outputs of the comparator and the reset OR gate are input into the output OR gate for producing the circuit output signal. When the output signal is low, or logic true, the AND gate is latched so that changes in the circuit input signal during this time period do not affect circuit operation.
    • 用于产生具有预定持续时间的脉冲的电路输出信号的有选择地响应于电路输入信号的单稳态电路包括具有两个输入端口和输出端口的与门。 输入端口的输入端与电路输入信号相连,并将该信号反相。 另一个输入端口耦合到电路输出信号。 复位或门接收复位信号和与门的输出。 当复位信号为低电平时,复位或门输出与门的输出,从而启用电路。 复位或门的输出也转到具有斜坡电容器的斜坡发生器,其中的电流由电流驱动器提供。 比较器的参考电压由与斜坡电容相关的电路相同的电路提供,除了中间偏置基准被施加。 该偏置参考补偿电路上的温度变化。 通过电流镜操作的外部电流源驱动电容器电流驱动器和参考电压。 比较器和复位或门的输出被输入到用于产生电路输出信号的输出或门中。 当输出信号为低电平或逻辑为真时,与门锁存,使得此时间段内电路输入信号的变化不影响电路工作。
    • 8. 发明授权
    • Glitch trigger circuit
    • 毛刺触发电路
    • US5233232A
    • 1993-08-03
    • US848773
    • 1992-03-10
    • Carlton StuebingJeffrey O. Bradford
    • Carlton StuebingJeffrey O. Bradford
    • H03K5/00H03K5/13
    • H03K5/133H03K2005/00156H03K2005/00163
    • A timer circuit provides a wide range of precise and substantially accurate time intervals. The timer circuit includes a ramp generator circuit having a first input for receiving an input signal to start a ramp signal, a second input for receiving a ramp timing control signal, and an output for providing a ramp signal. A comparator has a first input coupled to the output of the ramp generator, a second input coupled to a reference voltage source, and an output for providing an end ramp signal. A counter circuit has a first input for receiving the end ramp signal to begin counting, a second input for receiving a counter timing control signal, and an output for providing a terminal count signal. The end ramp signal and the terminal count signal are combined in an AND gate to provide a signal that is delayed by a predetermined amount from the input signal.
    • 定时器电路提供宽范围的精确和基本准确的时间间隔。 定时器电路包括斜坡发生器电路,其具有用于接收输入信号以启动斜坡信号的第一输入端,用于接收斜坡定时控制信号的第二输入端和用于提供斜坡信号的输出端。 比较器具有耦合到斜坡发生器的输出的第一输入端,耦合到参考电压源的第二输入端和用于提供结束斜坡信号的输出端。 计数器电路具有用于接收结束斜坡信号以开始计数的第一输入端,用于接收计数器定时控制信号的第二输入端和用于提供端子计数信号的输出端。 结束斜坡信号和终端计数信号在与门中组合以提供从输入信号延迟预定量的信号。