公开(公告)号：US09112457B1

公开(公告)日：2015-08-18

申请号：US13752796

申请日：2013-01-29

Applicant: Teledyne LeCroy, Inc.

Inventor： Francois Lamarche ,  Anirudh Sureka

IPC: G06F17/10 ,  H03F1/32

CPC classification number: H03F1/32 ,  H03F1/3211 ,  H03F2200/261 ,  H03F2200/321 ,  H03F2203/45048 ,  H03F2203/45138 ,  H03F2203/45518 ,  H03F2203/45528

Abstract: A non-linear digital filtering process is provided whereby slew rate limitation-like phenomena in analog circuitry are compensated. Particularly, a reduction of the signal amplitude with respect to the theoretical size of the signal if linearity had held is avoided. A correct phase is re-established. Customized linear filtering, up-sampling, and down-sampling before and after the non-linear digital processing minimizes the creation of harmonics. The inventive system and method for non-linear processing has few parameters and it is not limited to a polynomial series. A dedicated calibration method is also provided to adapt the value of the parameter for a precise compensation of the right amount of slew rate limitation or other similar compression. Furthermore, a calibration method is shown to adjust existing DSP filtering to accomplish a precise desired filtering even when non-linear corrections may be arbitrarily large.

Abstract translation: 提供了非线性数字滤波处理，由此补偿模拟电路中的转换速率限制等现象。 特别地，如果线性度被保持，则相对于信号的理论尺寸减小了信号幅度。 正确的阶段重新建立。 非线性数字处理之前和之后的定制线性滤波，上采样和下采样都使谐波的产生最小化。 本发明的用于非线性处理的系统和方法具有很少的参数，并不限于多项式系列。 还提供了一种专用的校准方法，以适应参数的值，以精确补偿适当的压摆率限制或其他类似压缩量。 此外，示出了校准方法来调整现有的DSP滤波以实现精确的期望滤波，即使非线性校正可能是任意大的。

公开(公告)号：US12228607B2

公开(公告)日：2025-02-18

申请号：US18298249

申请日：2023-04-10

Applicant: Teledyne LeCroy, Inc.

Inventor： Matthew Weinstein ,  Francois Lamarche ,  Lawrence Jacobs

IPC: G01R31/28 ,  G01R31/302

Abstract: A receiver comprising a magnitude correction circuit to receive an electrical signal defined by a phase. The electrical signal is a combined electrical signal comprising a first signal and a second signal. The magnitude correction circuit comprising a detector to generate a control signal proportional to received power of the second signal and an error amplifier coupled to the detector to compare a reference voltage against an output of the detector to determine an amplification or attenuation of the second signal based on a drift of the electrical signal. The receiver further comprising a variable gain amplifier coupled to the magnitude correction circuit to generate a compensated electrical signal based on the amplification or attenuation of the second signal determined by the magnitude correction circuit and a de-modulating mixer coupled to the magnitude correction circuit, the de-modulating mixer to mix a phase compensated signal and the compensated electrical signal.

公开(公告)号：US20240337685A1

公开(公告)日：2024-10-10

申请号：US18298249

申请日：2023-04-10

Applicant: Teledyne LeCroy, Inc.

Inventor： Matthew Weinstein ,  Francois Lamarche ,  Lawrence Jacobs

IPC: G01R31/28 ,  G01R31/302

CPC classification number: G01R31/2874 ,  G01R31/3025

Abstract: A receiver comprising a magnitude correction circuit to receive an electrical signal defined by a phase. The electrical signal is a combined electrical signal comprising a first signal and a second signal. The magnitude correction circuit comprising a detector to generate a control signal proportional to received power of the second signal and an error amplifier coupled to the detector to compare a reference voltage against an output of the detector to determine an amplification or attenuation of the second signal based on a drift of the electrical signal. The receiver further comprising a variable gain amplifier coupled to the magnitude correction circuit to generate a compensated electrical signal based on the amplification or attenuation of the second signal determined by the magnitude correction circuit and a de-modulating mixer coupled to the magnitude correction circuit, the de-modulating mixer to mix a phase compensated signal and the compensated electrical signal.