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    • 9. 发明授权
    • Complex band-pass ΔΣ AD modulator for use in AD converter circuit
    • 用于AD转换器电路的复合带通DeltaSigma AD调制器
    • US07098828B2
    • 2006-08-29
    • US11157848
    • 2005-06-22
    • Hao SanHaruo KobayashiHiroki WadaAtsushi Wada
    • Hao SanHaruo KobayashiHiroki WadaAtsushi Wada
    • H03M3/00H03M1/00H04B14/06
    • H03M3/34H03M1/0665H03M3/40H03M3/424H03M3/464
    • A complex band-pass ΔΣ AD modulator is provided with a subtracter device, a complex band-pass filter, first and second AD converters, and first and second DA converters. The first and second DA converters and first and second logic circuits are sandwiched by first and second multiplexers. At a first timing of a clock signal, the first multiplexer inputs and outputs the first and second digital signals as they are, and at a second timing thereof, the first multiplexer inputs the first and second digital signals, and outputs the first digital signal as a second digital signal and outputs the second digital signal as a first digital signal. The second multiplexer inputs and outputs first and second analog signals similarly. The first and second logic circuits substantially noise-shapes non-linearities of the first and second DA converters by realizing complex digital and analog filters, using high-pass and low-pass element rotation methods.
    • 复数带通DeltaSigma AD调制器具有减法器件,复带通滤波器,第一和第二AD转换器以及第一和第二DA转换器。 第一和第二DA转换器和第一和第二逻辑电路夹在第一和第二多路复用器之间。 在时钟信号的第一定时,第一多路复用器原样输入并输出第一和第二数字信号,并且在其第二定时,第一多路复用器输入第一和第二数字信号,并将第一数字信号作为 第二数字信号并输出​​第二数字信号作为第一数字信号。 第二多路复用器类似地输入和输出第一和第二模拟信号。 通过使用高通和低通元素旋转方法实现复杂的数字和模拟滤波器,第一和第二逻辑电路基本上噪声地形成第一和第二DA转换器的非线性。