公开(公告)号：US5719389A

公开(公告)日：1998-02-17

申请号：US607152

申请日：1996-02-26

申请人： Tadashi Taniguchi

发明人： Tadashi Taniguchi

IPC分类号： G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  H01S5/022 ,  H03J3/14

CPC分类号： G11B7/131 ,  G11B7/0941 ,  G11B7/123 ,  G11B7/1359 ,  H01S5/02248 ,  H01S5/02292 ,  H01S5/0683

摘要： A laser coupler comprises photodiodes formed on a photodiode IC, a microprism mounted on the photodiode IC to lie on the photodiodes, and a semiconductor laser mounted nearby on the photodiode IC such that a beam of light entering into the microprism through its incident surface is bifurcated and introduced onto the photodiodes. A difference between the amount of incident light to one of the photodiodes and the amount of incident light to the other of the photodiodes is corrected by adjusting a difference between the gain of a current-voltage converter amplifier coupled to one of the photodiodes and the gain of a current-voltage converter amplifier coupled to the other photodiode. Thus, the laser coupler can be fabricated economically.

摘要翻译： 激光耦合器包括形成在光电二极管IC上的光电二极管，安装在光电二极管IC上的微棱镜以位于光电二极管上，以及安装在光电二极管IC附近的半导体激光器，使得通过其入射表面进入微棱镜的光束分叉 并引入光电二极管。 通过调整耦合到一个光电二极管的电流 - 电压转换器放大器的增益和增益之间的差异来校正与一个光电二极管的入射光量与入射到另一个光电二极管的入射光量之间的差异 耦合到另一光电二极管的电流 - 电压转换器放大器。 因此，可以经济地制造激光耦合器。

公开(公告)号：US4620114A

公开(公告)日：1986-10-28

申请号：US646113

申请日：1984-08-31

申请人： Philip A. K. Moon

发明人： Philip A. K. Moon

IPC分类号： G01R29/08 ,  H03J3/14 ,  H03K5/24 ,  G01R19/165

CPC分类号： H03J3/14

摘要： A signal strength detector comprises first, second and third transistors of the same conductivity type. The emitter electrodes of each transistor are connected together and coupled with one of a pair of dc supply lines. The collector electrodes of the first and second transistors are each coupled with the other of the pair of dc supply lines. The base electrode of the first and second transistors are each coupled via a resistor to the base electrode of the third transistor. The collector electrode of the third transistor is effective to provide a source of output current which is representative of a differential signal level between the base electrodes of the first and second transistors.

摘要翻译： 信号强度检测器包括具有相同导电类型的第一，第二和第三晶体管。 每个晶体管的发射电极连接在一起并与一对直流电源线中的一个耦合。 第一和第二晶体管的集电极各自与一对直流电源线中的另一个耦合。 第一和第二晶体管的基极电极经由电阻器耦合到第三晶体管的基极。 第三晶体管的集电极有效地提供表示第一和第二晶体管的基极之间的差分信号电平的输出电流源。

公开(公告)号：US4464793A

公开(公告)日：1984-08-07

申请号：US383075

申请日：1982-05-28

申请人： Raymond F. Hanson

发明人： Raymond F. Hanson

IPC分类号： H03J3/14 ,  H04B1/16

CPC分类号： H03J3/14

摘要： A selection circuit for series connection between the output of the detector stage and the input of the audio amplifier. The selection circuit requires a minimum number of components and is useful to drive a tuning indicator or similar type circuit.

摘要翻译： 用于在检测器级的输出和音频放大器的输入之间串联连接的选择电路。 选择电路需要最少数量的组件，并且可用于驱动调谐指示器或类似类型的电路。

公开(公告)号：US4336534A

公开(公告)日：1982-06-22

申请号：US53714

申请日：1979-07-02

申请人： Morio Kumagai

发明人： Morio Kumagai

IPC分类号： H03J3/14 ,  H03J7/02 ,  G09G3/00

CPC分类号： H03J7/02 ,  H03J3/14

摘要： A control signal generator for use with a broadcast receiver having a signal level indicator including a plurality of sequentially actuated luminous elements. The received signal strength is indicated by the number of luminous elements which are lit. The control signal generator is responsive to the signal level indicator to provide control signals for automatic frequency control circuitry and/or muting circuitry. The signal level indicator may include cicuitry for converting arbitrarily selected changes in the received signal to changes the indicator normally detects to thereby effect the sequential actuation of the luminous elements in accordance with the arbitrarily selected changes in the received signal.

摘要翻译： 一种与广播接收机一起使用的控制信号发生器，具有包括多个依次致动的发光元件的信号电平指示器。 接收到的信号强度由点亮的发光元件的数量表示。 控制信号发生器响应于信号电平指示器来提供用于自动频率控制电路和/或静噪电路的控制信号。 信号电平指示器可以包括用于将接收到的信号中的任意选择的变化转换成指示器正常检测到的改变，从而根据接收到的信号中任意选择的变化来实现发光元件的顺序启动。

公开(公告)号：US4320529A

公开(公告)日：1982-03-16

申请号：US24027

申请日：1979-03-26

申请人： Hidetoshi Maeda ,  Kazuo Inoue ,  Noboru Someno

发明人： Hidetoshi Maeda ,  Kazuo Inoue ,  Noboru Someno

IPC分类号： H03J7/18 ,  G01R23/10 ,  H03J1/00 ,  H03J1/04 ,  H03J3/14 ,  H04B1/16 ,  G01R23/02

CPC分类号： H03J1/0016 ,  H03J3/14

摘要： A frequency counting apparatus is advantageously utilized as a frequency counter for displaying in a digital manner the frequency being received by a radio receiver. The inventive frequency counting apparatus includes a quartz resonator adapted to oscillate at the frequency of 2.sup.n Hz where n is a positive integer, for example 32,768 Hz, and a microprocessor including a programming unit, an operating unit for making operation in accordance with a program of the programming apparatus, a counter and a control unit. The program steps of the programming unit are made to progress based on the oscillation output signal of the quartz resonator. The counter is supplied with a local oscillation signal of a radio receiver. The local oscillation signal supplied to the counter is gated for a predetermined time period determined in accordance with the program of the programming unit, whereby the local oscillation signal is counted. The count value in the counter is multiplied or divided by a prescribed correction factor preloaded in the programming unit by means of the operating unit.

摘要翻译： 频率计数装置有利地用作频率计数器，用于以数字方式显示由无线电接收机接收的频率。 本发明的频率计数装置包括适于以2nHz的频率振荡的石英谐振器，其中n是正整数，例如32768Hz，以及包括编程单元的微处理器，用于根据程序进行操作的操作单元 编程装置，计数器和控制单元。 基于石英谐振器的振荡输出信号使编程单元的编程步骤进行。 计数器被提供有无线电接收机的本地振荡信号。 提供给计数器的本地振荡信号被选通根据编程单元的程序确定的预定时间段，从而对本地振荡信号进行计数。 计数器中的计数值乘以运算单元在编程单元中预先加载预定的校正系数。

公开(公告)号：US4247950A

公开(公告)日：1981-01-27

申请号：US17061

申请日：1979-03-02

申请人： Yasuhiko Okuyama ,  Takeshi Takiya

发明人： Yasuhiko Okuyama ,  Takeshi Takiya

IPC分类号： G01R23/10 ,  H03J1/04 ,  H03J3/14 ,  H04B1/26

CPC分类号： G01R23/10 ,  H03J1/048 ,  H03J3/14

摘要： A display in a superheterodyne receiver having a local oscillator, adapted for displaying in a digital manner the frequency of a signal being received by the receiver by counting the local oscillation frequency by means of a preset counter wherein the data for the prescribed intermediate frequency or the complement thereof is preset. A reference voltage is generated by means of a variable resistor for correcting the difference between the preset value for the prescribed intermediate frequency and the actual intermediate frequency of the intermediate frequency stage of a receiver as actually manufactured, and a comparison voltage is obtained by digital/analog converting the output of a multiple-bit counter which is stepped responsive to clock pulses. The reference voltage and the comparison voltage are compared and the preset counter is supplied through a gate controlled responsive to the comparison output with the clock pulses of the number associated with the difference between both voltages, whereby the preset value in the preset counter is corrected.

摘要翻译： 具有本地振荡器的超外差接收机中的显示器，适于以数字方式显示由接收机接收的信号的频率，该预定计数器通过预设计数器计数本地振荡频率，其中规定的中频或 其补码是预设的。 通过可变电阻器产生参考电压，用于校正实际制造的接收机的规定中频预设值与实际中频之间的差异，并且通过数字/ 模拟转换响应于时钟脉冲而阶梯的多位计数器的输出。 比较参考电压和比较电压，并且通过响应于比较输出的门控对与两个电压之间的差值相关联的数字的时钟脉冲进行控制来提供预设计数器，从而校正预设计数器中的预设值。

公开(公告)号：US4233505A

公开(公告)日：1980-11-11

申请号：US933379

申请日：1978-08-14

申请人： Reisuke Sato

发明人： Reisuke Sato

IPC分类号： H04B10/00 ,  H03J1/00 ,  H03J3/14 ,  H03K17/795 ,  H04B10/114 ,  H04B10/524 ,  H01J40/14

CPC分类号： H03K17/7955

摘要： The present invention is a light receiving circuit which includes an active device and light responsive switching device. The active device has an emitter, a base and a collector, the base being responsive to a first constant voltage source and the collector being responsive to a second voltage source. The light responsive switching device has a first lead and a second lead, the first lead being connected electrical ground and the second lead being connected to the emitter of the active device. The light receiving circuit of the present invention exhibits a high response speed and a stable output waveform. In another embodiment, the light receiving circuit of the present invention includes two active devices and two light responsive switching devices.

摘要翻译： 本发明是一种光接收电路，其包括有源器件和光响应开关器件。 有源器件具有发射极，基极和集电极，所述基极响应于第一恒定电压源，并且所述集电极响应于第二电压源。 光响应开关装置具有第一引线和第二引线，第一引线连接电接地，第二引线连接到有源器件的发射极。 本发明的光接收电路具有高响应速度和稳定的输出波形。 在另一实施例中，本发明的光接收电路包括两个有源器件和两个光响应开关器件。

公开(公告)号：US4180777A

公开(公告)日：1979-12-25

申请号：US859538

申请日：1977-12-12

申请人： Tsuneo Yamada ,  Yukihiko Miyamoto

发明人： Tsuneo Yamada ,  Yukihiko Miyamoto

IPC分类号： H03D3/00 ,  G01R23/06 ,  H03J3/14 ,  H04B1/16

CPC分类号： H03J3/14

摘要： A tuning meter circuit for use with a pulse count FM demodulator of an FM receiver. The circuitry comprises a limiter circuit for amplitude limiting a frequency modulated input signal to produce a train of pulses the width of which varies in accordance with the frequency modulation of the input signal; a pulse shaping circuit for generating a trigger pulse for each of the pulses of the pulse train; a monostable multivibrator responsive to each trigger pulse for generating a train of pulses of substantially constant width, the number of which per unit time interval varies in accordance with the frequency modulation of the input signal; a low pass filter responsive to the last mentioned pulse train to produce a low frequency signal and thereby demodulate the frequency modulated signal; a difference amplifier also responsive to the last-mentioned pulse train, the difference amplifier having a threshold level at which it changes state; a tuning meter responsive to the direct current component of the output of the difference amplifier; the duty cycle of the monostable multivibrator and the threshold level of the difference amplifier being so related that the tuning indicator indicates the FM receiver is tuned correctly when a signal of exact intermediate frequency is applied to the limiter circuit; and where the monostable multivibrator includes means for varying the duty cycle thereof to compensate for undesired variations in the FM demodulator.

摘要翻译： 用于FM接收机的脉冲计数FM解调器的调谐计电路。 该电路包括限幅器电路，用于对频率调制的输入信号进行幅度限制，以产生一列脉冲，其宽度根据输入信号的频率调制而变化; 脉冲整形电路，用于产生脉冲序列的每个脉冲的触发脉冲; 响应于每个触发脉冲的单稳态多谐振荡器，用于产生基本恒定宽度的脉冲序列，其每单位时间间隔的数量根据输入信号的频率调制而变化; 响应于最后提到的脉冲串的低通滤波器产生低频信号，从而解调频率调制信号; 差分放大器还响应于最后提到的脉冲串，差分放大器具有阈值电平，在该阈值电平处改变状态; 响应于差分放大器的输出的直流分量的调谐表; 单稳态多谐振荡器的占空比和差分放大器的阈值电平如此相关，当精确中频信号被施加到限幅器电路时，调谐指示符指示FM接收机被正确地调谐; 并且其中单稳态多谐振荡器包括用于改变其占空比以补偿FM解调器中不期望的变化的装置。

公开(公告)号：US3956594A

公开(公告)日：1976-05-11

申请号：US526817

申请日：1974-11-25

申请人： Seiji Hirata

发明人： Seiji Hirata

IPC分类号： H03J3/14 ,  H04B1/16 ,  H04H1/00 ,  H04H40/45 ,  H04H5/00

CPC分类号： H04B1/1646 ,  H03J3/14

摘要： An indicating circuit for an FM stereophonic signal receiver for providing dual indications of tuning and channel balance. The indicating circuit is comprised of a tuning detecting circuit for providing a first signal admitting of a magnitude and polarity which represents the relative tuning condition of the FM receiver with respect to a received FM signal. The indicating circuit further includes respective channel level detecting circuits for providing respective signals admitting of magnitudes that represent the levels of the audio signals transmitted through the respective stereophonic signal channels of the receiver. A signal indicating meter provides indications representing the magnitudes and polarities of signals applied thereto and a switching circuit selectively supplies the output of the tuning detecting circuit or the outputs of the channel level detecting circuits to the indicating meter, whereby the relative tuning condition of the receiver as well as the channel balance of the receiver is selectively indicated.

摘要翻译： 用于FM立体声信号接收机的指示电路，用于提供调谐和通道平衡的双重指示。 指示电路包括调谐检测电路，用于提供表示FM接收机相对于接收的FM信号的相对调谐状态的幅度和极性的第一信号。 指示电路还包括各自的信道电平检测电路，用于提供表示通过接收机的各个立体声信号信道发送的音频信号的电平的幅度的各个信号。 信号指示表提供表示施加到其上的信号的大小和极性的指示，并且开关电路选择性地将调谐检测电路的输出或信道电平检测电路的输出提供给指示仪，由此接收机的相对调谐条件 选择性地指示接收机的信道平衡。

公开(公告)号：US3950702A

公开(公告)日：1976-04-13

申请号：US506101

申请日：1974-09-16

申请人： Noboru Saikaishi ,  Yukio Numata ,  Tsuneo Yamada

发明人： Noboru Saikaishi ,  Yukio Numata ,  Tsuneo Yamada

IPC分类号： H03J3/14 ,  H03J5/00 ,  H03J5/02 ,  H03J7/28 ,  H04B1/10 ,  H04B1/16 ,  H04B1/26 ,  H04B1/32

CPC分类号： H03J7/285 ,  H03J5/0272

摘要： A trigger signal for indicating the receiving point of a synthesizing type high frequency receiver including a voltage controlled oscillator is detected by a circuit comprising means for deriving an intermediate frequency signal from the received high frequency signal, a wave shaper for shaping the waveform of the intermediate frequency signal, a first monostable circuit connected to the output of the wave shaper and having a time constant larger than the width of the output but smaller than the minimum frequency spacing between individual stations, a second monostable circuit connected to the output of the first monostable circuit and having a time constant smaller than the width of the output of the wave shaper, and an AND gate circuit for producing a logical product of the output of the second monostable circuit and a sweeping clock signal.