公开(公告)号：US08217815B2

公开(公告)日：2012-07-10

申请号：US12861970

申请日：2010-08-24

申请人： Jianqiu Chen ,  Sterling Smith ,  Jianping Cheng

发明人： Jianqiu Chen ,  Sterling Smith ,  Jianping Cheng

IPC分类号： H03M3/00

CPC分类号： H03M3/474 ,  H03M3/456

摘要： A Sigma-Delta modulator with a shared operational amplifier (op-amp) includes an integrated circuit, having two integrators sharing the op-amp, capable of integrating two input signals of the two integrators; a plurality of quantizers, coupled to the integrating circuit, for comparing outputting signals of the integrators with a predetermined signal and then generating digital outputting signals; a plurality of DACs, respectively coupled to the quantizers, for converting the digital outputting signals to analog feedback signals to the integrators; and a clock generator, for providing clock signals to the integrating circuit and the quantizers. Accordingly, layout area and power consumption of the modulator are reduced due to the shared op-amp.

摘要翻译： 具有共享运算放大器（运算放大器）的Σ-Δ调制器包括集成电路，具有共享运算放大器的两个积分器，能够集成两个积分器的两个输入信号; 多个量化器，耦合到积分电路，用于将积分器的输出信号与预定信号进行比较，然后产生数字输出信号; 分别耦合到量化器的多个DAC，用于将数字输出信号转换为模拟反馈信号到积分器; 以及用于向积分电路和量化器提供时钟信号的时钟发生器。 因此，由于共享运算放大器，调制器的布局面积和功耗降低。

公开(公告)号：US20110063155A1

公开(公告)日：2011-03-17

申请号：US12861970

申请日：2010-08-24

申请人： Jianqiu Chen ,  Sterling Smith ,  Jianping Cheng

发明人： Jianqiu Chen ,  Sterling Smith ,  Jianping Cheng

IPC分类号： H03M3/00

CPC分类号： H03M3/474 ,  H03M3/456

摘要： A Sigma-Delta modulator with a shared operational amplifier (op-amp) includes an integrated circuit, having two integrators sharing the op-amp, capable of integrating two input signals of the two integrators; a plurality of quantizers, coupled to the integrating circuit, for comparing outputting signals of the integrators with a predetermined signal and then generating digital outputting signals; a plurality of DACs, respectively coupled to the quantizers, for converting the digital outputting signals to analog feedback signals to the integrators; and a clock generator, for providing clock signals to the integrating circuit and the quantizers. Accordingly, layout area and power consumption of the modulator are reduced due to the shared op-amp.

摘要翻译： 具有共享运算放大器（运算放大器）的Σ-Δ调制器包括集成电路，具有共享运算放大器的两个积分器，能够集成两个积分器的两个输入信号; 多个量化器，耦合到积分电路，用于将积分器的输出信号与预定信号进行比较，然后产生数字输出信号; 分别耦合到量化器的多个DAC，用于将数字输出信号转换为模拟反馈信号到积分器; 以及用于向积分电路和量化器提供时钟信号的时钟发生器。 因此，由于共享运算放大器，调制器的布局面积和功耗降低。