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    • 4. 发明授权
    • Simple theft deterrent for electronic control modules
    • 电子控制模块的简单防盗威慑
    • US5742226A
    • 1998-04-21
    • US270357
    • 1994-07-05
    • Ronald Julius SzaboDan Darryl Carman
    • Ronald Julius SzaboDan Darryl Carman
    • B60Q1/00
    • B60Q1/00
    • An electronic theft deterrent system for deterring theft of an electronic device, such as a radio associated with a vehicle, that takes advantage of already existing device parameters, controls and displays associated with the device. When used as a theft deterrent system for the vehicle radio, a radio operator will first activate a frequency control switch in order to set an arbitrary frequency in the display of the radio. Next, a predetermined set of theft key radio control buttons are activated for a predetermined time in order to cause the arbitrary frequency that is displayed to be stored in a non-volatile memory. When the frequency is stored, the radio volume is impaired, but the total operation of the radio is not disabled. When the operator wishes to restore the radio to its normal operating condition, the operator will reset the arbitrary frequency, and reactivate the theft key control buttons. If the currently displayed frequency setting matches the stored frequency setting in the memory, the radio will be removed from the theft guarded condition, and the audio portion of the radio will be restored. If successive attempts to restore the radio to its normal operating conditions fail, an attempts counter will cause the radio to remain in its impaired state until an authorized service agent is able to restore the operation of the radio.
    • 一种用于防止窃取电子设备(例如与车辆相关联的无线电)的电子防盗系统,其利用已经存在的设备参数,与设备相关联的控制和显示。 当用作车载无线电的盗窃威慑系统时,无线电操作者将首先激活频率控制开关,以便在无线电的显示中设定任意频率。 接下来,预定的一组盗窃无线电控制按钮被激活预定时间,以便使所显示的任意频率存储在非易失性存储器中。 当存储频率时,无线电体积受损,但无线电的总体操作未被禁用。 当操作员希望将收音机恢复到正常操作状态时,操作员将重置任意频率,并重新启动盗窃键控制按钮。 如果当前显示的频率设置与存储器中存储的频率设置相匹配,则无线电将被从防盗保护状态中移除,并且收音机的音频部分将被恢复。 如果将无线电恢复到其正常工作状态的连续尝试失败,则尝试计数器将导致无线电设备处于受损状态,直到授权服务代理能够恢复无线电的操作。
    • 5. 发明授权
    • Low cost, high speed track and hold circuit
    • 低成本,高速跟踪和保持电路
    • US5736878A
    • 1998-04-07
    • US667557
    • 1996-06-21
    • Scott Cameron McLeod
    • Scott Cameron McLeod
    • G11C27/02H03M1/12
    • G11C27/026
    • A very fast circuit for tracking an input signal and holding the value for digitization comprises a holding capacitor, two charging circuits connected to either side of the capacitor and extending between a constant current generator and a supply voltage. Each charging circuit has an input transistor responsive to an analog input signal and a load including the capacitor, as well as a series switching transistor responsive to a sample signal to permit a tracking mode or forcing a hold mode. The load includes a diode to effect a low resistance during the tracking mode when the capacitor is charging and a very high resistance during the hold mode when the capacitor is discharging.
    • 用于跟踪输入信号并保持数字化值的非常快的电路包括保持电容器,两个充电电路连接到电容器的任一侧并在恒定电流发生器和电源电压之间延伸。 每个充电电路具有响应于模拟输入信号和包括电容器的负载的输入晶体管,以及响应于采样信号以允许跟踪模式或强制保持模式的串联开关晶体管。 负载包括二极管,以在电容器充电期间在跟踪模式期间产生低电阻,并且在电容器放电时在保持模式期间具有非常高的电阻。
    • 6. 发明授权
    • Integrated differential voltage amplifier with programmable gain and
input offset voltage
    • 具有可编程增益和输入失调电压的集成差分电压放大器
    • US6011422A
    • 2000-01-04
    • US113525
    • 1998-07-10
    • Dennis Michael KoglinRobert Harrison Reed
    • Dennis Michael KoglinRobert Harrison Reed
    • G01L9/06H03K3/42
    • H03F3/45098G01D3/021G01D3/036G01L1/225G01L1/2281G01L9/065H03F3/45475H03F2203/45492H03F2203/45586
    • A multiplier and corresponding method are provided for amplifying a voltage difference between a first input voltage and a second input voltage, the multiplier being implemented with Bipolar Junction Transistor technology having high emitter resistance. The multiplier includes a first bipolar input transistor having high emitter resistance that receives the first input voltage and a second bipolar input transistor having high emitter resistance that receives the second input voltage. The multiplier also includes a first current source for generating a first current that flows through said first bipolar input transistor, a current mirror for producing a second current that is substantially equal to said first current and flows through said second bipolar input transistor. A range select impedance forms a first voltage loop with said first bipolar input transistor and said second bipolar input transistor and translates the voltage difference between the first input voltage and the second input voltage into a differential current. The differential current varies said second current and alters a base-to-emitter voltage of said second bipolar input transistor. A second voltage loop is provided that includes said second bipolar input transistor, the second voltage loop providing a relationship between said base-to-emitter voltage of said second bipolar input transistor and a multiplier current that represents the difference between the first input voltage and the second input voltage.
    • 提供了乘法器和相应的方法来放大第一输入电压和第二输入电压之间的电压差,乘法器由具有高发射极电阻的双极结晶体管技术实现。 乘法器包括具有接收第一输入电压的高发射极电阻的第一双极输入晶体管和接收第二输入电压的具有高发射极电阻的第二双极性输入晶体管。 乘法器还包括用于产生流过所述第一双极输入晶体管的第一电流的第一电流源,用于产生基本上等于所述第一电流并流过所述第二双极性输入晶体管的第二电流的电流镜。 范围选择阻抗与所述第一双极输入晶体管和所述第二双极输入晶体管形成第一电压环路,并将第一输入电压和第二输入电压之间的电压差转换成差分电流。 差分电流改变所述第二电流并改变所述第二双极性输入晶体管的基极 - 发射极电压。 提供了包括所述第二双极性输入晶体管的第二电压回路,所述第二电压回路提供所述第二双极性输入晶体管的所述基极间发射极电压与代表所述第一输入电压与所述第二输入电压之间的差的乘法器电流之间的关系 第二输入电压。
    • 8. 发明授权
    • Method of accurately gauging fuel in an automotive tank
    • 在汽车油箱中精确测量燃料的方法
    • US5752409A
    • 1998-05-19
    • US348392
    • 1994-12-02
    • Raymond LippmannMichael John SchnarsJames Edward NelsonIvan Roy Brouwer
    • Raymond LippmannMichael John SchnarsJames Edward NelsonIvan Roy Brouwer
    • G01F23/36G01F23/00
    • G01F23/36
    • The maximum full level is determined in a fuel tank of undetermined size using a fuel level sender referenced to the tank bottom. A minimum full value is selected for a given type of tank and when the sender signal goes below a percentage of that value and subsequently goes above the minimum full value, a fueling event is recognized and the current fuel sender value is adopted as the maximum full value. Where a heavily filtered signal is used to minimize the effects of fuel slosh, the maximum full value is subject to increasing to higher values occurring during a short period after fueling to allow recovery of the filtered signal. An empty value is calibrated before the vehicle is initially fueled. A maximum empty level is initially set and if a lower level is measured when the ignition is turned on, the lower level is set as the empty value. This calibration is terminated when the tank is fueled above the minimum full value.
    • 使用参考油箱底部的燃料液位传感器在不确定尺寸的油箱中确定最大满量程。 对于给定类型的油箱,选择最小满值,当发送方信号低于该值的百分比并随后超过最小值时,将识别加油事件,并将当前燃料发送方值作为最大值 值。 在使用严重过滤的信号来最小化燃料晃动的影响的情况下,最大完整值将被增加到在加油之后的短时间内发生的更高值,以允许恢复过滤的信号。 在车辆最初加油前校准一个空值。 初始设置最大空位,如果在点火开启时测量较低电平,则将较低电平设置为空值。 当油箱燃油超过最小全量值时,此校准终止。
    • 9. 发明授权
    • Circuitry for controlling load current
    • 用于控制负载电流的电路
    • US5796278A
    • 1998-08-18
    • US637984
    • 1996-04-26
    • Douglas Bruce OsbornMark Wendell GoseJohn Mark Dikeman
    • Douglas Bruce OsbornMark Wendell GoseJohn Mark Dikeman
    • G05F3/30H03K17/082H03K17/14H03B1/00
    • H03K17/0822G05F3/30H03K17/145
    • Circuitry for controlling load current, in accordance with the present invention, utilizes a load drive transistor configuration operable to provide a first load current path having a first fraction of load current flowing therethrough and a second load current path having a second smaller fraction of load current flowing therethrough. The circuit includes a sense resistor associated with the load drive transistor to detect various load current threshold values. In order to reduce debiasing effects of the sense resistor upon the second load current path of the load drive transistor, a compensation resistor is provided between drive inputs associated with each of the two current paths. The compensation resistor has a compensation voltage established thereacross which is operable to negate the debiasing effect of the sense resistor on the load driving device.
    • 根据本发明的用于控制负载电流的电路利用负载驱动晶体管配置,其可操作以提供具有流过其中的负载电流的第一分数的第一负载电流路径和具有第二小负载电流的第二负载电流路径 流过 该电路包括与负载驱动晶体管相关联的检测电阻器,以检测各种负载电流阈值。 为了减少感测电阻器对负载驱动晶体管的第二负载电流路径的去噪效应,在与两个电流路径中的每一个相关联的驱动输入之间提供补偿电阻器。 补偿电阻器具有建立在其上的补偿电压,其可操作以否定感测电阻器对负载驱动装置的去抖动效应。
    • 10. 发明授权
    • Dual keypad telephone handset for mobile communications
    • 双键盘电话手机,用于移动通信
    • US5610971A
    • 1997-03-11
    • US359175
    • 1994-12-19
    • Karl D. Vandivier
    • Karl D. Vandivier
    • H04M1/60H04M11/00
    • H04M1/6075
    • A telephone for mobile application affords hands-free operation when the handset is seated in a cradle and hand-held operation when removed from the cradle. The two modes are automatically sensed by a reed switch in the handset operated by a magnet in the cradle. The back of the handset, which is accessible when in the cradle, contains a back keypad and a back display, and the front of the handset contains a front keypad and a front display along with a microphone and an earpiece. When the reed switch senses hands-free mode only the back keypad and display are enabled, along with an external speaker and microphone. When hand-held mode is sensed, the front keypad, display and audio functions are enabled.
    • 当手机位于托架中时,移动应用的电话可以免提操作,当从支架中取出时,手持操作。 这两种模式由手机中的磁铁操作的舌簧开关自动检测。 手机的背面,可在支架中可访问,包含背面键盘和背面显示屏,手机前部包含前面板和前置显示屏以及麦克风和耳机。 当簧片开关感应到免提模式时,只有后面板的键盘和显示屏才能启用,还有一个外部扬声器和麦克风。 当检测到手持模式时,前面板,显示屏和音频功能被启用。