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    • 5. 发明授权
    • Short circuit protection circuit
    • 短路保护电路
    • US08139333B2
    • 2012-03-20
    • US12420516
    • 2009-04-08
    • Takao ImaiHiroshi MoriJun ItoHisao Niwa
    • Takao ImaiHiroshi MoriJun ItoHisao Niwa
    • H02H3/00H02H5/00H02H3/06
    • H01H47/002H01H47/32
    • A short circuit protection circuit which readily recovers a relay drive circuit to an output operation state after a short circuit is cancelled while preventing the relay drive circuit from being damaged by a short circuit. The relay drive circuit outputs a drive current to a load in accordance with a first control signal. A short circuit detection circuit detects the occurrence of a short circuit at an output side of the relay drive circuit and suspends output operation of the relay drive circuit when a short circuit occurs. Further, the short circuit detection circuit intermittently transmits a recovery signal to the relay drive circuit in a certain time interval after a predetermined time elapses from when the short circuit occurs to recover the output operation of the relay drive circuit. The time interval is gradually increased whenever the recovery signal is transmitted.
    • 一种短路保护电路,其能够在阻止继电器驱动电路被短路损坏的同时,将继电器驱动电路容易地恢复到短路后的输出动作状态。 继电器驱动电路根据第一控制信号向负载输出驱动电流。 短路检测电路检测在继电器驱动电路的输出侧出现短路,并且在短路发生时暂停继电器驱动电路的输出动作。 此外,短路检测电路在从短路发生开始经过预定时间之后,以一定的时间间隔将恢复信号发送到继电器驱动电路,以恢复继电器驱动电路的输出操作。 每当发送恢复信号时,时间间隔逐渐增加。
    • 6. 发明授权
    • Multi-layer-substrate and satellite broadcast reception apparatus
    • 多层基板和卫星广播接收装置
    • US06853334B2
    • 2005-02-08
    • US10409181
    • 2003-04-09
    • Takao Imai
    • Takao Imai
    • H05K3/46H01P5/103H01P5/107H01Q1/24H01Q1/38
    • H01Q1/247
    • There can be provided an LNB converter including a multilayer substrate formed of more than two layers, capable of providing adequate transit characteristic for any frequency, and a multilayer substrate. A microstrip line is provided at one surface layer's pattern and a second layer's pattern cooperating with the surface layer's pattern to sandwich a dielectric layer underlying the surface layer's pattern. A probe is inserted from the surface layer's pattern in a direction intersecting a 4-layer substrate and in at least one pattern layer other than the first and second, pattern layers at least a region surrounding a hole having a probe passing therethrough is either a pattern-free region provided by removing a predetermined region surrounding the hole or an isolated region corresponding to a predetermined region surrounding the hole and electrically isolated from an outer region of the pattern layer.
    • 可以提供一种LNB转换器,其包括由多于两层形成的能够为任何频率提供足够的传输特性的多层基板和多层基板。 在一个表面层图案处提供微带线,并且与表面层图案协作的第二层图案夹在表面层图案下面的介电层。 从与表面层图案相交的方向上的探针沿着与4层基板相交的方向和至少一个不同于第一图案层和第二图案层的图案层插入至少一个围绕穿过其中的探针的孔的区域是图案 通过去除围绕孔的预定区域或对应于围绕孔的预定区域并与图案层的外部区域电绝缘的隔离区域来提供。
    • 8. 发明授权
    • Satellite receiving converter and satellite receiving system
    • 卫星接收转换器和卫星接收系统
    • US06957039B2
    • 2005-10-18
    • US10202881
    • 2002-07-26
    • Takao Imai
    • Takao Imai
    • H04B1/18H04B7/185H04N5/44H04N7/20H04H1/00
    • H04B7/18517
    • A satellite receiving converter of the present invention performs receiving operation in response to a pulse signal supplied from a tuner. To prevent an amplitude of the pulse signal from being largely reduced in the receiving operation, the satellite receiving converter includes a trap circuit made up of an inductor and a capacitor. The trap circuit is provided after a low-pass filter which divides a pulse signal and a direct-current voltage supplied to a regulator IC. The trap circuit is provided so as to raise impedance with respect to the pulse signal at a signal input-output terminal, thereby preventing error operation of an internal circuit, such as a control circuit.
    • 本发明的卫星接收转换器响应于从调谐器提供的脉冲信号执行接收操作。 为了防止在接收操作中脉冲信号的幅度大大降低,卫星接收转换器包括由电感器和电容器组成的陷波电路。 陷波电路在将脉冲信号和提供给调节器IC的直流电压分压的低通滤波器之后提供。 陷波电路被设置成在信号输入 - 输出端子处相对于脉冲信号提高阻抗,从而防止诸如控制电路的内部电路的错误操作。