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    • 3. 发明授权
    • Reduced cost pointing stick circuit
    • 降低成本指标棒电路
    • US5870078A
    • 1999-02-09
    • US623075
    • 1996-03-28
    • Robert Stephen Olyha, Jr.Joseph Dela Rutledge
    • Robert Stephen Olyha, Jr.Joseph Dela Rutledge
    • G06F3/038H03M1/56G09G5/08
    • G06F3/0383
    • A low-cost circuit processes, with high precision, the output signals of a pointing stick used for controlling a cursor on a computer display screen. A two-stage method of high precision moderate range analog-to-digital (A/D) conversion is combined with a known method of A/D conversion by sweeping a reference voltage across the range of the voltage to be measured at a known rate and noting the time of coincidence. Operational amplifiers of moderate quality are used in an open-loop mode, so that the operational amplifier inputs are high impedance. In order to get sufficient isolation from power supply noise and variations, the analog circuitry is isolated from the supply voltage while measurements are being made. To avoid interference from the digital switching transients of the microprocessor with the analog comparator switching time, the microprocessor is placed in idle mode, thereby removing its internal clock drive signals (and associated transients) from all of the microprocessor's internal circuitry except the timer which is being used to make the measurement. The resulting circuitry is capable of detecting a very small signal in noise spikes many times larger.
    • 低成本电路以高精度处理用于在计算机显示屏上控制光标的指示杆的输出信号。 高精度中等范围模数(A / D)转换的两级方法与A / D转换的已知方法组合,通过以已知速率扫描待测电压范围的参考电压 并注意到巧合的时间。 中等质量的运算放大器用于开环模式,因此运算放大器输入为高阻抗。 为了充分隔离电源噪声和变化,模拟电路在进行测量时与电源电压隔离。 为了避免模拟比较器切换时间对微处理器的数字切换瞬变的干扰,微处理器处于空闲模式,从而从除微处理器内部的定时器之外的所有微处理器的内部电路中除去其内部时钟驱动信号(和相关瞬变) 用于进行测量。 所得到的电路能够检测到噪声尖峰中的非常小的信号多倍。
    • 6. 发明授权
    • Low-power standby mode for a remote sensing device
    • 遥控器的低功耗待机模式
    • US5831593A
    • 1998-11-03
    • US586270
    • 1996-01-16
    • Joseph Dela Rutledge
    • Joseph Dela Rutledge
    • G06F1/26G06F1/32G06F3/038G09G5/00
    • G06F1/3215G06F1/3259Y02B60/1253
    • A battery powered sensing device using an analog sensor has electronic circuitry that maintains sensitivity and calibration of the sensing device during quiescent periods with very little power drain. In one implementation, a joystick is provided with a sensitive analog sensor, such as strain gauges, connected to the shaft of the joystick. The strain gauges are connected in a bridge circuit across which a voltage is applied. Three operational amplifiers are connected to combinations of the strain gauges in the bridge circuit to generate X, Y and Z output voltages corresponding to the combined signals generated by the strain gauges. A microprocessor receives outputs from the sensitive analog sensor and generates a sample signal and performs a recalibration of sampled signals during periods of inactivity. The sampling interval for recalibration is increased in periods of extended inactivity, greatly reducing the current draw on the battery power supply and greatly reducing power requirements of the sensing device.
    • 使用模拟传感器的电池供电的感测装置具有电子电路,其在静止期间保持感测装置的灵敏度和校准,具有极少的功率消耗。 在一个实施方案中,操纵杆设置有连接到操纵杆的轴的敏感模拟传感器,例如应变仪。 应变计连接在施加电压的桥接电路中。 三个运算放大器连接到桥接电路中的应变仪的组合,以产生与由应变计产生的组合信号相对应的X,Y和Z输出电压。 微处理器从敏感的模拟传感器接收输出并产生采样信号,并且在不活动期间对采样信号进行重新校准。 在延长的不活动期间,重新校准的采样间隔增加,大大降低了电池电源上的电流消耗,并大大降低了传感装置的功率需求。
    • 8. 发明授权
    • Graphics display pointer with integrated selection
    • 具有集成选择的图形显示指针
    • US5696535A
    • 1997-12-09
    • US340935
    • 1994-11-17
    • Joseph Dela RutledgeEdwin Joseph Selker
    • Joseph Dela RutledgeEdwin Joseph Selker
    • G06F3/038G09G5/00
    • G06F3/038
    • A threshold discrimination filter circuit compares an amplitude and rate of change of amplitude of an output of a graphic input device such as an isometric joystick including strain gauges and a fixed resistance in a hierarchical voltage divider with threshold reference signals and corrects the output of the graphic input device based on previously stored samples thereof when a selection or deselection action by a user is discriminated. Outputs of the graphic input device are supplied directly to a CPU of a data processing device between masking periods so that graphic manipulations such as dragging can be performed while masking unintended change of specified display location during selection and deselection.
    • 阈值识别滤波器电路比较具有阈值参考信号的分层分压器中包括应变仪和固定电阻的诸如等距操纵杆的图形输入装置的输出的振幅和幅度变化率,并校正图形的输出 当鉴别出用户的选择或取消选择动作时,基于先前存储的样本的输入设备。 图形输入装置的输出在屏蔽周期之间直接提供给数据处理装置的CPU,从而可以在屏蔽在选择和取消选择期间指定的显示位置的意外变化的同时执行诸如拖动之类的图形操作。