公开(公告)号：WO2015160924A1

公开(公告)日：2015-10-22

申请号：PCT/US2015/025934

申请日：2015-04-15

Applicant: THE BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM

Inventor： CHIU, Yun ,  WU, Bo

IPC: H03F1/08 ,  H03F3/45 ,  H03F3/21

CPC classification number: H03F3/45179 ,  H03F1/086 ,  H03F3/211 ,  H03F3/45183 ,  H03F3/45188 ,  H03F3/45237 ,  H03F3/4565 ,  H03F2200/153 ,  H03F2200/408 ,  H03F2203/45116 ,  H03F2203/45222 ,  H03F2203/45236 ,  H03F2203/45418 ,  H03F2203/45481

Abstract: Disclosed are systems implementing an implicit Feed-Forward Compensated (FFC) op-amp, where the main FFC port is realized by the P-side (404) of the CMOS input structure of the 2nd (412) and 3rd (414) stages of the op-amp, while the main signal path is through the N-side (402). The 2nd-stage (412) NMOS input pair is split into two pairs, one is used to route the main path while the other is used for auxiliary FFC. The disclosed implicit FCC op-amp is unconditionally stable with adequate phase lead. According to some embodiments, the disclosed op-amp, which may be a wide-band op-amp, can be used in highly linear applications operative at intermediate frequency (IF), such as signal buffers for high-performance data converters or radio-frequency (RF) modulators and demodulators, continuous-time (CT) filters or sigma-delta data converters.

Abstract translation: 公开了实现隐式前馈补偿（FFC）运算放大器的系统，其中主FFC端口由第二（412）和第（414）级的CMOS输入结构的P侧（404）实现 运算放大器，而主信号路径则通过N侧（402）。 第二级（412）NMOS输入对被分成两对，一个用于路由主路径，另一个用于辅助FFC。 所公开的隐式FCC运算放大器是无条件稳定的，具有足够的相位导联。 根据一些实施例，所公开的可以是宽带运算放大器的运算放大器可以用于在中频（IF）下操作的高度线性的应用中，例如用于高性能数据转换器或无线电设备的信号缓冲器， 频率（RF）调制器和解调器，连续时间（CT）滤波器或Σ-Δ数据转换器。