公开(公告)号：US20140369451A1

公开(公告)日：2014-12-18

申请号：US13930573

申请日：2013-06-28

Applicant: Broadcom Corporation

Inventor： Jiangfeng Wu ,  Binning Chen

IPC: H04L25/08

CPC classification number: H03M1/164

Abstract: Methods and apparatuses are described for a direct sampling receiver having high dynamic range and low noise figure with a continuous-time (CT) multiplying digital-to-analog converter (MDAC) architecture. In a multipath architecture, the input signal is sampled in the quantizer path, but not the CT signal path. In the CT signal path, only a filtered residue signal is sampled. Coarse bits generated in the quantizer path and fine bits generated in the input signal path are digitally combined to reconstruct the analog input signal in the digital domain. Filtering, aperture error control and digital equalization remove sources of errors, resulting in high performance. Advantages include toleration of multiple blocker signals, simultaneous reception of multiple weak channels and/or strong and weak channels, operation with simplified gain control and reduced pre-amplification as well as operation without excessive power consumption, external filters and tunable local oscillator (LO).

Abstract translation: 描述了具有高动态范围和低噪声系数的直接采样接收机的方法和装置，其具有连续时间（CT）乘法数​​模转换器（MDAC）架构。 在多径架构中，输入信号在量化器路径中被采样，而不是CT信号路径。 在CT信号路径中，只对滤波后的残留信号进行采样。 在量化器路径中生成的粗位和在输入信号路径中产生的精细位被数字组合以重建数字域中的模拟输入信号。 滤波，孔径误差控制和数字均衡消除误差源，导致高性能。 优点包括容许多个阻塞信号，同时接收多个弱信道和/或强弱信道，具有简化的增益控制和减少的预放大以及无功耗的操作，外部滤波器和可调谐本地振荡器（LO）的操作， 。