公开(公告)号：US06495816B1

公开(公告)日：2002-12-17

申请号：US09302745

申请日：1999-04-30

Applicant: Lester R. Brodeur

Inventor： Lester R. Brodeur

IPC: H01J4014

CPC classification number: G01J1/44

Abstract: In a video receiver, a photodiode is terminated with one or more junction diodes to provide an output voltage that is a log function of the incident optical power. The termination with the diode provides a nonlinear resistance which converts the output current of the photodiode to a voltage, with the output voltage being the log of the input current due to the nonlinear resistance characteristic associated with junction diodes. The subject system eliminates the necessity of providing a transimpedance amplifier used to obtain a voltage from the photo current of a photodetector and also the requirement for a log amplifier to provide the log of the voltage to give the receiver a wide dynamic range. In one embodiment a PIN diode is provided with a series of termination diodes, with the larger of the number of diodes, the more voltage that is available. The series-connected termination diodes provide a passive low noise system for converting the photo current to a log voltage.

Abstract translation: 在视频接收机中，光电二极管被一个或多个结二极管端接，以提供作为入射光功率的对数函数的输出电压。 二极管的端接提供了一种非线性电阻，可将光电二极管的输出电流转换为电压，由于与结二极管相关的非线性电阻特性，输出电压为输入电流的对数。 主题系统消除了提供用于从光电检测器的光电流获得电压的跨阻放大器的必要性，并且还需要对数放大器来提供电压对数以给予接收器宽的动态范围。 在一个实施例中，PIN二极管设置有一系列终端二极管，其中较大的二极管数量可用电压越大。 串联连接的终端二极管提供用于将光电流转换为对数电压的无源低噪声系统。

公开(公告)号：US06342737B1

公开(公告)日：2002-01-29

申请号：US09267866

申请日：1999-03-12

Applicant: Lester R. Brodeur

Inventor： Lester R. Brodeur

IPC: H02J100

CPC classification number: H02M3/33561 ,  Y10T307/469 ,  Y10T307/735

Abstract: A binary demand feedback DC converter having multiple DC outputs which are all independently regulated using a binary on/off technique is disclosed. A comparator associated with each output compares the voltage at a given output with a reference voltage for the respective given output and generates a first signal the moment the output voltage exceeds the reference voltage. Responding immediately to the first signal a switch opens the converter transformer secondary winding associated with that output from a rectifier and filter. The voltage at that output is determined by the voltage across a capacitor in the filter and the capacitor commences discharging to be below the reference voltage at which time the first signal ceases and the switch reconnects the secondary winding to the rectifier and filter to recommence charging the filter capacitor. A logic OR gate having its inputs connected to all comparators senses the first signal from any one of the comparators and provides a signal that operates a second switch that disconnects a binary switch controller from the converter transformer primary winding until there are no first signals present at the input of the OR gate.

Abstract translation: 公开了具有多个DC输出的二进制需求反馈DC转换器，它们都使用二进制开/关技术独立调节。 与每个输出相关联的比较器将给定输出处的电压与相应给定输出的参考电压进行比较，并在输出电压超过参考电压的时刻产生第一信号。 立即响应第一个信号，开关打开与整流器和滤波器的输出相关联的转换器变压器次级绕组。 该输出端的电压由滤波器中的电容器两端的电压决定，电容器开始放电至低于参考电压，此时第一个信号停止，开关将次级绕组重新连接到整流器和滤波器，重新开始对 滤波电容器。 具有连接到所有比较器的输入的逻辑或门感测来自比较器中的任何一个的第一信号，并提供操作第二开关的信号，该第二开关将二进制开关控制器与转换器变压器初级绕组断开，直到不存在第一信号 OR门的输入。

公开(公告)号：US4631543A

公开(公告)日：1986-12-23

申请号：US536479

申请日：1983-09-28

Applicant: Lester R. Brodeur

Inventor： Lester R. Brodeur

IPC: G01S1/24

CPC classification number: G01S1/245

Abstract: The effects of impulse noise on the operation of a microprocessor-controlled Loran-C receiver are reduced by muting or attenuating the received signals in the front end of the receiver ahead of the receiver gain during a time period which preceeds the start time of the pulses being tracked. The attenuation is selectively removed after the start time of each pulse being tracked to permit the receiver to perform its time difference of pulse arrival measurements in the normal manner. The attenuation is also selectively removed during those time periods in which the receiver performs its envelope slope, skywave/groundwave and other such samplings. The attenuation is provided by a muting circuit which is controlled by a time gate signal that derives from the microprocessor of the receiver.

Abstract translation: 脉冲噪声对微处理器控制的Loran-C接收机的操作的影响通过在接收器增益的前端之前的接收机前端的接收信号的静音或衰减在超过脉冲的开始时间的时间段内被减少 被跟踪。 在跟踪每个脉冲的开始时间之后，选择性地去除衰减，以允许接收机以正常方式执行脉冲到达测量的时间差。 在接收机执行其包络斜率，天波/地面波和其他这样的采样的那些时间段期间，衰减也被选择性地去除。 衰减由静音电路提供，该静噪电路由从接收机的微处理器导出的时间门信号控制。

公开(公告)号：USRE31962E

公开(公告)日：1985-07-30

申请号：US568557

申请日：1984-01-05

Applicant: Lester R. Brodeur

Inventor： Lester R. Brodeur

IPC: G01S1/24 ,  G01S5/10

CPC classification number: G01S5/10 ,  G01S1/245

Abstract: LORAN-C navigation apparatus is disclosed wherein digital circuitry and a microprocessor .[.is.]. .Iadd.are .Iaddend.used to automatically identify LORAN transmitting stations and .[.makes.]. .Iadd.make .Iaddend.standard hyberbolic navigation measurements. The equipment operator manually enters the group repetition rate into the apparatus for a LORAN-C chain covering the area within which the navigation apparatus is being operated. Initially, the apparatus searches all incoming signals .Iadd.as they are received .Iaddend.until signals from a master station are received regularly at the stored group repetition rate. The apparatus then closely determines the time of arrival of signals from the secondary stations of the selected LORAN-C chain before changing to a fine search mode in which the exact time of arrival of the secondary station signals is determined; the phase code of the received signals is checked to determine if the received signal is a ground or sky wave, and a determination is made if there is a defective secondary station blink code. The time difference of arrival measurements are then output visually to be plotted in a well known manner on a LORAN-C chart to locate the position of the craft upon which the apparatus is located.

公开(公告)号：US4468668A

公开(公告)日：1984-08-28

申请号：US289842

申请日：1981-08-03

Applicant: Lester R. Brodeur

Inventor： Lester R. Brodeur

IPC: G01S1/24

CPC classification number: G01S1/245

Abstract: A method for processing navigation signals received by a LORAN-C receiver to lessen the effects of noise on the navigation data provided to the receiver user. Time of signal arrival information measured by the receiver is modified depending on the signal-to-noise environment to remove extreme time of signal arrival deviations that are obviously erroneous. The modified information is then averaged to more accurately determine the true time of signal arrival and thereby provide more stable and accurate navigation data.

Abstract translation: 一种用于处理由LORAN-C接收机接收的导航信号以减少噪声对提供给接收机用户的导航数据的影响的方法。 由接收机测量的信号到达信息的时间根据信噪比环境进行修改，以消除明显错误的信号到达偏差的极限时间。 然后对经修改的信息进行平均以更准确地确定信号到达的真实时间，从而提供更稳定和准确的导航数据。

公开(公告)号：US4268830A

公开(公告)日：1981-05-19

申请号：US28143

申请日：1979-04-09

Applicant: Lester R. Brodeur

Inventor： Lester R. Brodeur

IPC: G01S1/02 ,  G01S19/48 ,  G01S1/24

CPC classification number: G01S1/026

Abstract: A method for self calibration of a LORAN-C navigation receiver utilizing a microprocessor is disclosed wherein the time difference of signal arrival of master station pulse trains from a LORAN-C chain selected by group repetition interval (GRI) information input to the receiver becomes a frequency standard to which the output of an oscillator and counter internal to the receiver is compared to determine frequency error. The error is interpolated over each GRI and a correction factor is added or subtracted to each count output of the counter used to make time difference of signal arrival measurements.

Abstract translation: 公开了一种使用微处理器的LORAN-C导航接收机的自校准方法，其中主站脉冲序列从由输入到接收机的组重复间隔（GRI）信息选择的LORAN-C链的信号到达时间差成为 将与接收机内部的振荡器和计数器的输出进行比较的频率标准来确定频率误差。 误差在每个GRI内插，并且校正因子被加或减去用于使信号到达测量的时间差的计数器的每个计数输出。

公开(公告)号：US4224623A

公开(公告)日：1980-09-23

申请号：US918751

申请日：1978-06-26

Applicant: William R. Mercer ,  William C. Wurst ,  Lester R. Brodeur

Inventor： William R. Mercer ,  William C. Wurst ,  Lester R. Brodeur

IPC: G01S1/24

CPC classification number: G01S1/245

Abstract: A Loran-C receiver cycle detector is disclosed which processes Loran-C signal pulses on a cycle-by-cycle basis of the carrier frequency and generates an output for a specific carrier cycle. Due to received noise, sampling techniques are used to create a histogram which is analyzed to provide feedback used to accurately locate a tracking point on each Loran-C pulse.

Abstract translation: 公开了一种Loran-C接收机周期检测器，其在载波频率的逐个周期的基础上处理Loran-C信号脉冲，并且产生用于特定载波周期的输出。 由于接收到的噪声，采样技术被用于创建直方图，该直方图被分析以提供用于准确定位每个罗兰C脉冲上的跟踪点的反馈。