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公开(公告)号：US20050260968A1
公开(公告)日：2005-11-24
申请号：US11132655
申请日：2005-05-19
申请人： Osamu Ito , Toshiaki Iimura , Kunio Fukuda
发明人： Osamu Ito , Toshiaki Iimura , Kunio Fukuda
CPC分类号： H04B7/12 , H04B7/0871 , H04L27/2647
摘要： Disclosed herein is a demodulating device including, first high-frequency receiving means and second high-frequency receiving means for receiving a high-frequency signal of one of a first frequency and a second frequency, first signal strength detecting means and second signal strength detecting means for detecting strengths of signals received by the first high-frequency receiving means and the second high-frequency receiving means, respectively, and strength determining means for performing control so as to make the second high-frequency receiving means receive a high-frequency signal of the first frequency when the first high-frequency receiving means is made to receive the high-frequency signal of the first frequency and the second high-frequency receiving means is made to receive a high-frequency signal of the second frequency and when the second signal strength detecting means does not detect a predetermined signal strength within a predetermined time after the first signal strength detecting means detects a predetermined signal strength.
摘要翻译： 这里公开了一种解调装置，包括第一高频接收装置和第二高频接收装置，用于接收第一频率和第二频率之一的高频信号，第一信号强度检测装置和第二信号强度检测装置 用于分别检测由第一高频接收装置和第二高频接收装置接收的信号的强度，以及强度确定装置，用于执行控制，以使第二高频接收装置接收高频信号的高频信号 使第一高频接收装置接收第一频率的高频信号和第二高频接收装置的第一频率接收第二频率的高频信号，并且当第二信号 强度检测装置在第一信号stren之后的预定时间内没有检测到预定信号强度 第g检测装置检测预定的信号强度。
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公开(公告)号：US5835476A
公开(公告)日：1998-11-10
申请号：US488140
申请日：1990-03-05
CPC分类号： G11B7/126
摘要： A laser diode driving apparatus detects the laser power output of a semiconductor laser diode (13), irradiating a laser bean on a write-once or overwrite optical disk (11), by a detector (14), compares the resulting detection output signal by a comparator (17) with a laser power setting signal, modulates the resulting comparison output signal with record data by a modulating device (19), and drives the laser diode (13) by a driving device (22) with the resulting modulation output signal. By providing the modulation device (19) in the APC circuit adapted for controlling the output of the semiconductor laser diode (13), it becomes possible to automatically set the laser power necessary for recording to an optimum value, as well as to widen the temperature range and the working characteristics of the semiconductor laser diode.
摘要翻译： PCT No.PCT / JP89 / 00703 Sec。 371日期1990年3月5日 102（e）1990年3月5日PCT PCT 1989年7月12日PCT公布。 公开号WO90 / 01206 日期1990年8月2日激光二极管驱动装置通过检测器（14）检测半导体激光二极管（13）的激光功率输出，用一次写入或重写光盘（11）照射激光束， 通过具有激光功率设定信号的比较器（17）产生的检测输出信号，通过调制装置（19）对所得到的比较输出信号与记录数据进行调制，并用驱动装置（22）驱动激光二极管（13） 产生的调制输出信号。 通过在适于控制半导体激光二极管（13）的输出的APC电路中设置调制装置（19），可以将记录所需的激光功率自动设定为最佳值，并且扩大温度 范围和半导体激光二极管的工作特性。
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公开(公告)号：US6122313A
公开(公告)日：2000-09-19
申请号：US463683
申请日：1995-06-05
CPC分类号： H04L1/24
摘要： A system for testing an overall system employing an integrated circuit with a modulator thereon is disclosed. The system for testing includes structure for causing the modulator to continually transmit data and structure for causing the continually transmitted data to exhibit extreme frequency deviation. In both instances the structure may be a single register. This register may also include a set of bits that may be set to select a continuous or an alternating pattern or, stated another way, a maximum or a minimum peak frequency deviation.
摘要翻译： 公开了一种用于测试采用其上具有调制器的集成电路的整个系统的系统。 用于测试的系统包括使调制器连续传输数据和结构的结构，以使连续传输的数据呈现极端的频率偏差。 在这两种情况下，结构可以是单个寄存器。 该寄存器还可以包括可以设置为选择连续或交替模式的一组位，或者以另一种方式说明最大或最小峰值频率偏差。
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公开(公告)号：US07474881B2
公开(公告)日：2009-01-06
申请号：US11132655
申请日：2005-05-19
申请人： Osamu Ito , Toshiaki Iimura , Kunio Fukuda
发明人： Osamu Ito , Toshiaki Iimura , Kunio Fukuda
IPC分类号： H04B7/08
CPC分类号： H04B7/12 , H04B7/0871 , H04L27/2647
摘要： Disclosed herein is a demodulating device including, first high-frequency receiving means and second high-frequency receiving means for receiving a high-frequency signal of one of a first frequency and a second frequency, first signal strength detecting means and second signal strength detecting means for detecting strengths of signals received by the first high-frequency receiving means and the second high-frequency receiving means, respectively, and strength determining means for performing control so as to make the second high-frequency receiving means receive a high-frequency signal of the first frequency when the first high-frequency receiving means is made to receive the high-frequency signal of the first frequency and the second high-frequency receiving means is made to receive a high-frequency signal of the second frequency and when the second signal strength detecting means does not detect a predetermined signal strength within a predetermined time after the first signal strength detecting means detects a predetermined signal strength.
摘要翻译： 这里公开了一种解调装置，包括第一高频接收装置和第二高频接收装置，用于接收第一频率和第二频率之一的高频信号，第一信号强度检测装置和第二信号强度检测装置 用于分别检测由第一高频接收装置和第二高频接收装置接收的信号的强度，以及强度确定装置，用于执行控制，以使第二高频接收装置接收高频信号的高频信号 使第一高频接收装置接收第一频率的高频信号和第二高频接收装置的第一频率接收第二频率的高频信号，并且当第二信号 强度检测装置在第一信号stren之后的预定时间内没有检测到预定信号强度 第g检测装置检测预定的信号强度。
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