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    • 3. 发明授权
    • Pulse discriminator
    • 脉冲辨识器
    • US3638128A
    • 1972-01-25
    • US3638128D
    • 1969-12-22
    • ADVANCED TECHNOLOGY CENTER INC
    • DOWNS ROBERT F
    • G01R29/027H03D3/04
    • G01R29/0273H03D3/04
    • Impulse noise effects on pulse-counting discriminators used for converting a frequency-modulated signal into a varying voltage are minimized by a feedback loop that controls the operation of a monostable multivibrator. In pulse-counting discriminators, voltage spikes are produced at a rate related to the frequency of a modulated signal. These spikes trigger the multivibrator that produces an output pulse of predetermined duration for each voltage spike. Output pulses from the multivibrator control the operation of a clamping circuit which, in turn, controls the operation of a ramp generator. A level detector compares the output of the ramp generator to a reference voltage signal and generates a voltage spike when the instantaneous value of the ramp generator output equals the reference signal. This voltage spike also connected to the multivibrator and triggers it to synthesize an output pulse. Operation of the clamping circuit, ramp generator and level detector in conjunction with the multivibrator synthesize an output pulse when one should appear. If the voltage spikes that trigger the multivibrator occur at a frequency in excess of an upper established limit, a second level detector compares the ramp generator output to a second reference signal. This second level detector generates a control signal to inhibit trigger pulses to the monostable multivibrator.
    • 通过控制单稳态多谐振荡器的操作的反馈环路,将用于将频率调制信号转换为变化电压的脉冲计数鉴别器的脉冲噪声影响最小化。 在脉冲计数鉴别器中,以与调制信号的频率相关的速率产生电压尖峰。 这些尖峰触发多谐振荡器,其为每个电压尖峰产生预定持续时间的输出脉冲。 来自多谐振荡器的输出脉冲控制钳位电路的操作,其又控制斜坡发生器的操作。 电平检测器将斜坡发生器的输出与参考电压信号进行比较,并且当斜坡发生器输出的瞬时值等于参考信号时产生电压尖峰。 该电压尖峰也连接到多谐振荡器并触发它合成输出脉冲。 与多谐振荡器一起工作的钳位电路,斜坡发生器和电平检测器在出现时会合成输出脉冲。 如果触发多谐振荡器的电压尖峰以超过上限的频率发生,则第二电平检测器将斜坡发生器输出与第二参考信号进行比较。 该第二电平检测器产生控制信号以禁止对单稳态多谐振荡器的触发脉冲。
    • 5. 发明授权
    • Wide band recording apparatus
    • 宽带录音设备
    • US3789420A
    • 1974-01-29
    • US3789420D
    • 1971-02-02
    • ADVANCED TECHNOLOGY CENTER INC
    • CLAYTOR REDEN D
    • B41M5/28G11C13/04G01D15/34
    • B41M5/283G11C13/048
    • Disclosed is a wide bandwidth recording medium including a thermochromic material which changes reflectance with temperature. Information is recorded on the recording medium by selectively varying temperatures of discrete portions of the thermochromic material with a modulated energy beam such as a laser beam or electron beam. Techniques are described which permit extremely high resolution of data bits to be obtained in the recording medium even though the recording process is a thermal one. Apparatus is also disclosed for erasably and permanently recording information on thermochromic films.
    • 公开了一种宽带记录介质,其包括随着温度改变反射率的热变色材料。 通过用诸如激光束或电子束的调制能量束选择性地改变热变色材料的离散部分的温度,将信息记录在记录介质上。 描述了即使记录处理是热的,也能够在记录介质中获得数据位的极高分辨率的技术。 还公开了用于在热致变色膜上可擦除地永久记录信息的装置。
    • 9. 发明授权
    • Light beam scanning systems and beam shifting devices for use in such systems
    • 用于这种系统的光束扫描系统和光束移动装置
    • US3804488A
    • 1974-04-16
    • US18454171
    • 1971-09-28
    • ADVANCED TECHNOLOGY CENTER INC
    • EDEN D
    • G02F1/29G02F1/28
    • G02F1/292
    • A light beam scanning system for deflecting a beam of light in mutually perpendicular planes having a first electro-optic device for deflecting the beam in one plane and a second electro-optic device in series with the first for deflecting the beam emergent from the first device in the same or a second plane. An optical device having a planar rectangular body of an electro-optic substance provided with aligned pairs of electrodes on opposite sides thereof which divide the body into serial prism portions through which a beam of light directed on one end of the body passes successively to cause shifting of the angle of the beam as it emerges through the other end of the body.
    • 一种光束扫描系统,用于在具有第一电光装置的相互垂直的平面中偏转光束,用于使光束在一个平面中偏转,第二电光装置与第一电光装置串联,用于使光束从第一装置偏转 在同一或第二平面。 一种具有电光物质的平面矩形体的光学器件,其在其相对侧上设置有对准的电极对,其将本体分成串联的棱镜部分,通过该棱镜部分,导向身体的一端的光束通过该棱镜部分顺序地通过, 当光束通过身体的另一端出现时的角度。