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    • 2. 发明授权
    • Apparatus for digital frequency scaling
    • 数字频率调整装置
    • US3864556A
    • 1975-02-04
    • US41154373
    • 1973-10-31
    • WESTINGHOUSE ELECTRIC CORP
    • FLUET FRANCIS A
    • G01R23/00G01R27/12G06F7/66G06F7/68G01R23/02
    • G06F7/68G01R23/00G01R27/12G06F7/66
    • Apparatus for digital frequency scaling having a first adder with dual inputs of opposite sign, one of the dual inputs receiving a signal which is a multiple a, times an input signal fin, the other of the dual inputs receiving a weighted scale signal bfo where b is a scale number 1,2,3, . . . .m, and fo is the output of the apparatus. An accumulating numerator register having digital output contents N is connected to the output of the first adder. A second adder having dual inputs, has an output connected to an accumulating remainder register having digital output contents R. One of the dual inputs of the second adder receives the contents N as a function of clock signals of frequency fc, the other of the dual inputs receiving a signal bD, where D is a preselected stored number. Comparators are connected to the accumulating remainder register for comparing N with bD, and R with O, for selecting the smallest scale number b such that N
    • 用于数字频率缩放的装置具有第一加法器,具有相反符号的双输入,双输入中的一个接收多个输入信号fin的信号倍数,双输入中的另一个接收加权比例信号bfo,其中b 是一个比例数字1,2,3。 。 。 .m,fo是设备的输出。 具有数字输出内容N的累积分子寄存器连接到第一加法器的输出。 具有双输入的第二加法器具有连接到具有数字输出内容R的累加余数寄存器的输出。第二加法器的双输入之一接收作为频率fc的时钟信号的函数的内容N, 输入接收信号bD,其中D是预先选择的存储号码。 比较器连接到累积余数寄存器,用于将N与bD进行比较,R与O进行比较,用于选择最小标度数b使得N