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公开(公告)号：US4313202A
公开(公告)日：1982-01-26
申请号：US136919
申请日：1980-04-03
申请人： Andrew M. Kameya
发明人： Andrew M. Kameya
CPC分类号： H04L27/06
摘要： Modem receiver featuring digital phase splitting filter circuitry for storing a changing sequence of successive said samples, multiplying a single, real-valued, stream of said stored samples respectively by coefficients, and combining the products of said multiplication to provide a complex-valued output consisting of a pair of output streams having associated carrier frequencies which, due solely to the selection of said coefficients, are equal but 90.degree. apart in phase, said coefficients being selected to establish a relationship between said outputs and said stored samples corresponding to bandpass filtering having an amplitude or phase response that does not exhibit symmetry in the frequency spectrum about the frequency of said carrier, and means for thereafter demodulating and encoding said output streams.
摘要翻译： 调制解调器接收器具有数字相位分离滤波器电路，用于存储连续的所述采样的变化序列，分别乘以所述存储样本的单个实数的流，并将所述乘法的乘积组合以提供复值输出， 具有相关联的载波频率的一对输出流的一对输出流，其仅仅由于所述系数的选择在相位上相等但相差90°，所述系数被选择为建立对应于带通滤波的所述输出和所存储的采样之间的关系， 关于所述载波的频率在频谱中不表现出对称性的幅度或相位响应，以及此后对所述输出流进行解调和编码的装置。
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公开(公告)号：US4052598A
公开(公告)日：1977-10-04
申请号：US682734
申请日：1976-05-03
CPC分类号： H03G3/3005 , G05B11/40
摘要： A control system comprising a gain control circuit for adjusting the gain of an input signal to provide a gain controlled signal and an integrator for integrating the gain controlled signal to provide an output signal. A first circuit responds to a particular condition for changing the gain of the gain control circuit and a second circuit responds to that same condition for changing the output signal independently of the gain control signal to bring about a more rapid change in the output signal than could be brought about solely by changing the gain controlled signal.
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