公开(公告)号：US20060007999A1

公开(公告)日：2006-01-12

申请号：US11029733

申请日：2005-01-05

Applicant: Ramon Gomez ,  Donald McMullin

Inventor： Ramon Gomez ,  Donald McMullin

IPC: H03H7/30

CPC classification number: H04B1/30

Abstract: Certain embodiments of the invention provide a method and system for enhancing image rejection in communications receivers. A test tone signal may be injected into a receiver. A quadrature error in an in-phase (I) channel and a quadrature (Q) channel of the receiver may be estimated based on the injecting of the test tone signal into the receiver. A plurality of equalizer coefficients may be adjusted to correct the estimated quadrature error in the I channel and the Q channel of the receiver. A corrected I channel and a corrected Q channel may be generated corresponding to the I channel and the Q channel in the receiver based on the adjusting of the equalizer coefficients.

Abstract translation: 本发明的某些实施例提供了一种用于增强通信接收机中的镜像抑制的方法和系统。 测试音信号可以被注入接收机。 可以基于将测试音信号注入到接收机中来估计接收机的同相（I）信道和正交（Q）信道中的正交误差。 可以调整多个均衡器系数以校正接收机的I信道和Q信道中的估计的正交误差。 可以基于均衡器系数的调整，对应于接收机中的I信道和Q信道来生成校正的I信道和校正的Q信道。

公开(公告)号：US20050221784A1

公开(公告)日：2005-10-06

申请号：US10984750

申请日：2004-11-10

Applicant: Ramon Gomez ,  Myles Wakayama

Inventor： Ramon Gomez ,  Myles Wakayama

IPC: H04B1/26 ,  H04B1/28 ,  H04B1/40 ,  H04B15/00

CPC classification number: H04B1/28

Abstract: A dual conversion receiver selects and down-converts one channel from a plurality of channels in a received RF signal. The dual conversion receiver includes first and second mixer stages that are driven by first and second local oscillator signals. Channel selection is performed by tuning the first local oscillator signal so that a desired channel is up-converted to a first IF frequency, which defines the center of the passband of a first bandpass filter connected between the first and second mixer stages. The second mixer stage down-converts the output of the first bandpass filter to a second IF frequency, which is further filtered by a second bandpass filter. The first and second local oscillators can produce harmonics that mix in the second mixer stage, causing unwanted spurious signals that can fall in band with the second IF frequency. In order to avoid interference from these unwanted spurious signals, the frequency step size of the first local oscillator is tuned so that the spurious signals fall out-of-band of the second IF frequency.

Abstract translation: 双转换接收器从接收到的RF信号中的多个信道中选择并降频一个信道。 双转换接收机包括由第一和第二本地振荡器信号驱动的第一和第二混频器级。 通过调谐第一本地振荡器信号来执行信道选择，使得期望的信道被上变频到第一IF频率，该第一IF频率定义连接在第一和第二混频器级之间的第一带通滤波器的通带的中心。 第二混频器级将第一带通滤波器的输出降频转换为第二IF频率，第二IF频率由第二带通滤波器进一步滤波。 第一和第二本地振荡器可以产生在第二混频器级中混合的谐波，从而产生可能与第二IF频率成带的不想要的寄生信号。 为了避免来自这些不想要的寄生信号的干扰，调整第一本地振荡器的频率步长，使得杂散信号落在第二IF频率的带外。

公开(公告)号：US20050062491A1

公开(公告)日：2005-03-24

申请号：US10963639

申请日：2004-10-14

Applicant: Lawrence Burns ,  Leonard Dauphinee ,  Ramon Gomez ,  James Chang

Inventor： Lawrence Burns ,  Leonard Dauphinee ,  Ramon Gomez ,  James Chang

IPC: G01R31/26 ,  G01R31/30 ,  G01R31/317 ,  H01L21/66 ,  H03F3/21 ,  H04N5/44 ,  H04N5/52 ,  H04N7/10 ,  G01R31/02

CPC classification number: H01L22/20 ,  G01R31/2607 ,  G01R31/30 ,  G01R31/31723 ,  H03F3/211 ,  H04N5/4446 ,  H04N5/52 ,  H04N7/102

Abstract: A method and system for monitoring and compensating the performance of an operational circuit is provided. The system includes one or more integrated circuit chips and a controller. Each integrated circuit chip includes one or more operational circuits, each operational circuit having at least one controllable circuit parameter. Each integrated circuit chip also includes a process monitor module at least partially constructed thereon. The controller is coupled to each process monitor module and to each operational circuit. The controller includes logic for evaluating the performance of an operational circuit based on data obtained from process monitor module and operational circuit related data stored in a memory. Based on the evaluation, the controller determines whether any deviations from desired or optimal performance of the circuit exist. If deviations exist, the controller generates a control signal to initiate adjustments to the operational circuit to compensate for the deviations.

Abstract translation: 提供了一种用于监测和补偿操作电路的性能的方法和系统。 该系统包括一个或多个集成电路芯片和控制器。 每个集成电路芯片包括一个或多个操作电路，每个操作电路具有至少一个可控电路参数。 每个集成电路芯片还包括至少部分地构建在其上的过程监控模块。 控制器耦合到每个过程监控模块和每个操作电路。 控制器包括用于基于从存储在存储器中的过程监视模块和操作电路相关数据获得的数据来评估操作电路的性能的逻辑。 基于评估，控制器确定是否存在与电路的期望或最佳性能的任何偏差。 如果存在偏差，则控制器产生控制信号以启动对运算电路的调整以补偿偏差。

公开(公告)号：US20050048939A1

公开(公告)日：2005-03-03

申请号：US10649807

申请日：2003-08-28

Applicant: Donald McMullin ,  Ramon Gomez ,  Lawrence Burns ,  Myles Wakayama

Inventor： Donald McMullin ,  Ramon Gomez ,  Lawrence Burns ,  Myles Wakayama

IPC: H04B1/28 ,  H04B1/18

CPC classification number: H04B1/28

Abstract: An apparatus and method for local oscillator calibration compensates for filter passband variation in a mixer circuit, such as a receiver circuit. The receiver includes at least a mixer circuit and a filter coupled to the output of the mixer. During operation, the mixer mixes an RF input signal with a first local oscillator (LO) signal to frequency translate a selected channel in the RF input signal into the passband of the filter. During a calibration mode, the RF input signal is disabled, and the first LO signal is injected into the filter input by leaking the first LO signal through the mixer circuit. The frequency of the LO signal is then swept over a frequency bandwidth that is sufficiently wide so that the actual passband is detected by measuring the signal amplitude at the output of the bandpass filter, thereby determining any variation in the passband of the filter from the expected passband. Once the actual passband is determined, then the frequency of the first local oscillator signal is adjusted or tuned to compensate for any frequency shift of the actual passband compared to the expected passband. Therefore, the selected channel is up-converted into the center of the actual passband of the bandpass filter and will not fall outside the passband. This enables the passband of the bandpass filter to be narrowed, as compared with conventional receivers that do not utilize this calibration procedure. For example, the bandpass filter can be narrowed to one or two channels wide.

Abstract translation: 用于本地振荡器校准的装置和方法补偿诸如接收机电路的混频器电路中的滤波器通带变化。 接收器至少包括混频器电路和耦合到混频器输出端的滤波器。 在操作期间，混频器将RF输入信号与第一本地振荡器（LO）信号混频，以将RF输入信号中的选定信道频率转换成滤波器的通带。 在校准模式期间，RF输入信号被禁止，并且通过将第一LO信号泄漏通过混频器电路将第一LO信号注入滤波器输入。 然后将LO信号的频率扫过足够宽的频带宽度，以便通过测量带通滤波器输出端的信号振幅来检测实际通带，从而根据预期的方式确定滤波器通带的任何变化 通带。 一旦确定了实际通带，则调整或调谐第一本地振荡器信号的频率，以补偿与预期通带相比实际通带的任何频移。 因此，所选通道被上变频为带通滤波器的实际通带的中心，不会落在通带外。 与使用该校准程序的常规接收器相比，这使带通滤波器的通带变窄。 例如，带通滤波器可以变窄到一个或两个通道宽。

公开(公告)号：US20050046505A1

公开(公告)日：2005-03-03

申请号：US10948546

申请日：2004-09-24

Applicant: Ramon Gomez

Inventor： Ramon Gomez

IPC: H03B5/12 ,  H03B5/32 ,  H03B5/30

CPC classification number: H03B5/364

Abstract: A resonant oscillator circuit includes an active device and a resonator that causes the active device to oscillate at a resonant frequency of the resonator. The active device includes one or more transistors that are DC biased using one or more resistors. The bias resistors generate thermal noise that is proportional to the resistance value. An external inductor circuit is connected across the output terminals of the active device and in parallel with the resonator. The external inductor circuit shorts-out at least some of the thermal noise that is generated by the bias resistors, and thereby reduces the overall phase noise of the resonant oscillator.

公开(公告)号：US20050041802A1

公开(公告)日：2005-02-24

申请号：US10826281

申请日：2004-04-19

Applicant: Ramon Gomez ,  Donald McMullin

Inventor： Ramon Gomez ,  Donald McMullin

IPC: H03D7/16 ,  H04L29/06 ,  H04N7/10 ,  H04K1/10

CPC classification number: H04L63/04 ,  H03D7/161 ,  H04L63/062 ,  H04L63/08 ,  H04L63/123 ,  H04N7/10

Abstract: Systems and methods for digital upconversion of baseband television signals that can be used in cable television headend systems are provided. In one embodiment, the system includes a digital frequency adjustment system and a digital to analog conversion system. In a feature of the embodiment, the digital frequency adjustment system consists of set of digital upconversion and upsample elements that shift upwards the frequency of baseband signals. In a further feature of the embodiment, a tree structure of sets of upsample and upconversion elements is used. In another embodiment, the system includes digital and analog frequency adjustment systems in which the frequencies of the input signals are partially upshifted within both the digital and analog domains. Methods for digital upconversion of television signals are also provided.

Abstract translation: 提供了可用于有线电视头端系统的基带电视信号的数字上变频的系统和方法。 在一个实施例中，该系统包括数字频率调整系统和数模转换系统。 在该实施例的特征中，数字频率调整系统包括一组数字上变频和向上移动基带信号频率的上采样元件。 在该实施例的另一特征中，使用上采样和上转换元件组的树结构。 在另一个实施例中，该系统包括数字和模拟频率调整系统，其中输入信号的频率在数字和模拟域内部分升高。 还提供了电视信号数字上变频的方法。