公开(公告)号：WO2008077235A1

公开(公告)日：2008-07-03

申请号：PCT/CA2007/002252

申请日：2007-12-14

Applicant: SIRIFIC WIRELESS CORPORATION ,  MANKU, Tajinder ,  BELLAOUAR, Abdellatif

Inventor： MANKU, Tajinder ,  BELLAOUAR, Abdellatif

IPC: H04B1/04 ,  H03M1/66 ,  H03M3/00

CPC classification number: H03M1/68 ,  H03M1/745 ,  H03M3/50 ,  H03M7/3004

Abstract: A digital linear transmitter for digital to analog conversion of a radio frequency signal. The transmitter includes a delta sigma (ΔΣ) digital to analog converter (DAC) and a weighted signal digital to analog converter in the transmit path of a wireless device to reduce reliance on relatively large analog components. The ΔΣ DAC converts the lowest significant bits of the oversampled signal while the weighted signal digital to analog converter converts the highest significant bits of the oversampled signal. The transmitter core includes components for providing an oversampled modulated digital signal which is then subjected to first order filtering of the oversampled signal prior to generating a corresponding analog signal. The apparatus and method reduces analog components and increases digital components in transmitter core architecture of wireless RF devices.

Abstract translation: 一种用于数字到模拟转换射频信号的数字线性发射机。 发射机包括ΔΣ（ΔS）数模转换器（DAC）和无线设备的发射路径中的加权信号数模转换器，以减少对相对大的模拟组件的依赖。 ΔSDAC转换过采样信号的最低有效位，而加权信号数模转换器转换过采样信号的最高有效位。 发射机核心包括用于提供过采样的调制数字信号的组件，然后在产生相应的模拟信号之前对过采样信号进行一阶滤波。 该装置和方法减少了模拟组件并增加了无线RF设备的发射机核心架构中的数字组件。

公开(公告)号：WO2006102741A1

公开(公告)日：2006-10-05

申请号：PCT/CA2006/000460

申请日：2006-03-29

Applicant: SIRIFIC WIRELESS CORPORATION ,  MANKU, Tajinder

Inventor： MANKU, Tajinder

IPC: H03M1/00 ,  H04Q7/32 ,  H04B7/005 ,  H03G3/20 ,  H04B1/40 ,  H03M1/66 ,  H03M1/34

CPC classification number: H04W52/52 ,  H03G3/3042 ,  H04B2001/0416

Abstract: A system for generating a supply voltage, temperature and process compensated gain control voltage from a digital data word. In particular, the compensated gain voltage control voltage maintains a linear relationship between a change in gain in response to an input gain control voltage for a gain circuit of a transmitter circuit. A monitor circuit senses at least one of the supply voltage, temperature and process parameters, and generates a first set of digital signals corresponding to the sensed parameter. A digital compensator circuit converts the input gain control voltage into a second set of digital signals, and decodes the combined first and second set of digital signals to provide a data word. The data word is converted into an analog voltage representing the compensated gain voltage control voltage. The digital compensator circuit includes a table of compensation values, each accessible by a distinct combination of the first and second set of digital signals.

Abstract translation: 一种用于从数字数据字产生电源电压，温度和工艺补偿的增益控制电压的系统。 特别地，补偿增益电压控制电压响应于发射机电路的增益电路的输入增益控制电压而保持增益变化之间的线性关系。 监视器电路感测电源电压，温度和工艺参数中的至少一个，并产生对应于感测参数的第一组数字信号。 数字补偿器电路将输入增益控制电压转换为第二组数字信号，并对组合的第一和第二组数字信号进行解码以提供数据字。 数据字被转换为表示补偿的增益电压控制电压的模拟电压。 数字补偿器电路包括补偿值表，每一个表可以通过第一组和第二组数字信号的不同组合来访问。

公开(公告)号：WO2004064246A1

公开(公告)日：2004-07-29

申请号：PCT/CA2004/000025

申请日：2004-01-08

Applicant: SIRIFIC WIRELESS CORPORATION ,  DOSANJH, Sathwant ,  KUNG, William ,  MANKU, Tajinder

Inventor： DOSANJH, Sathwant ,  KUNG, William ,  MANKU, Tajinder

IPC: H03D7/16

CPC classification number: H03B21/01 ,  H03D3/007 ,  H03H7/21 ,  H03H2007/0192 ,  H04B1/26 ,  H04B1/30

Abstract: The present invention relates generally to communications, and more specifically to a method and apparatus for generating local oscillator signals used for up- and down-conversion of RF (radio frequency) signals. A major problem in the design of modulators and demodulators, if the leakage of local oscillator (LO) signals into the received signal path. The invention presents a number of highly integratable circuits which resolve the LO leakage problem, using regenerative divider circuits acting on oscillator signals which are running at a multiple or fraction of the frequency of the desired LO signal, to generate in-phase (I) and quadrature (Q) mixing signals. Embodiments of these circuits also use harmonic subtraction and polyphase mixers, as well as virtual local oscillator TM (VLO) mixing signals. VLO mixing signals are signal pairs which emulate local oscillator signals by means of complementary mono-tonal and multi-tonal mixing signals.

Abstract translation: 本发明一般涉及通信，更具体地涉及用于产生用于RF（射频）信号的上变频和下变频的本地振荡器信号的方法和装置。 如果本地振荡器（LO）信号泄漏到接收信号路径中，调制器和解调器的设计中的主要问题。 本发明提出了许多高度可积分的电路，其解决了LO泄漏问题，使用作用于振荡器信号的再生分压器电路，该振荡器信号以期望LO信号的频率的多个或几分之一运行，以产生同相（I）和 正交（Q）混频信号。 这些电路的实施例也使用谐波减法和多相混频器，以及虚拟本地振荡器TM（VLO）混频信号。 VLO混合信号是通过互补单声道和多音调混合信号模拟本地振荡器信号的信号对。

公开(公告)号：WO2004062087A1

公开(公告)日：2004-07-22

申请号：PCT/CA2004/000014

申请日：2004-01-06

Applicant: SIRIFIC WIRELESS CORPORATION ,  KUNG, William ,  SNYDER, Christopher, Eugene

Inventor： KUNG, William ,  SNYDER, Christopher, Eugene

IPC: H03D7/16

CPC classification number: H04B1/0475 ,  H03D7/163 ,  H04B2001/0491

Abstract: The present invention relates generally to communications, and more specifically to a method and apparatus of modulating baseband and RF (radio frequency) signals. A modulator topology is disclosed in which an input signal x(t) is up-converted to an output signal y(t), either by mixing it with two mixing signals φ1 and φ2 ("pseudo-direct conversion" mode), or by mixing it with only one mixing signal φ2 ("direct-conversion" mode). In pseudo-direct modulation mode, the φ1 and φ2 mixing signals emulate a local oscillator signal; the product φ1* φ2 has significant power at the frequency of a local oscillator signal being emulated, but neither φ1 nor φ2 have significant power at the frequency of the input signal x(t), the LO signal being emulated, or the output signal φ1 φ2 x(t).

Abstract translation: 本发明一般涉及通信，更具体地涉及调制基带和RF（射频）信号的方法和装置。 公开了一种调制器拓扑，其中通过将输入信号x（t）与两个混合信号phi1和phi2（“伪直接转换”模式）混合，或者通过 将其仅混合一个混合信号phi2（“直接转换”模式）。 在伪直接调制模式下，phi1和phi2混合信号模拟本地振荡器信号; 产品phi1 * phi2在本地振荡器信号的频率被仿真时具有显着的功率，但是在输入信号x（t）的频率，正在仿真的LO信号或者输出信号phi1中，phi1和phi2都不具有显着的功率 phi2 x（t）。

公开(公告)号：WO2003071696A1

公开(公告)日：2003-08-28

申请号：PCT/CA2003/000256

申请日：2003-02-25

Applicant: SIRIFIC WIRELESS CORPORATION ,  MANKU, Tajinder

Inventor： MANKU, Tajinder

IPC: H04B1/30

CPC classification number: H04B1/28 ,  H03D3/008 ,  H03D7/163 ,  H03D7/166 ,  H04B1/30 ,  H04B2001/0491

Abstract: There is a need for an inexpensive, high-performance, fully-integrable, multi-­standard transceiver, which suppresses spurious noise signals. The invention provides a topology that satisfies this need, using a first signal generator which produces an oscillator signal f1 and a second signal generator which produces a mono-tonal mixing signal φ2, where f1 is a multiple of the frequency of φ2; and a logic circuit for generating a multi-tonal mixing signal φ1, where φ1 * φ2 has significant power at the frequency of said local oscillator signal being emulated, neither of said cp1 nor said φ2 having significant power at the carrier frequency of said input signal x(t) or said LO signal being emulated.

Abstract translation: 需要一种廉价，高性能，完全可集成的多标准收发器，可以抑制杂散噪声信号。 本发明提供了一种使用产生振荡器信号f1的第一信号发生器和产生单声道混合信号phi2的第二信号发生器满足该需要的拓扑结构，其中f1是phi2频率的倍数，逻辑电路 用于产生多音调混合信号phi1，其中，在所述本地振荡器信号的频率被仿真的情况下，phi1 ast phi2具有显着的功率，所述cp1和所述phi2在所述输入信号xt或所述LO的载波频率都不具有有效功率 信号被仿真。

公开(公告)号：WO2003019800A2

公开(公告)日：2003-03-06

申请号：PCT/CA2002/001316

申请日：2002-08-28

Applicant: SIRIFIC WIRELESS CORPORATION ,  MANKU, Tajinder ,  LING, Yang ,  KUNG, William

Inventor： MANKU, Tajinder ,  LING, Yang ,  KUNG, William

IPC: H04B1/00

CPC classification number: H04B1/28 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1466 ,  H03D7/1483 ,  H03D2200/0025 ,  H03D2200/0043 ,  H03D2200/0084 ,  H03D2200/009

Abstract: There is a need for an inexpensive, high-performance, fully-integrable, multi-standard transceiver. The invention provides a topology that satisfies this need, consisting of: an active mixer, followed by a high pass filter, and a passive mixer. The input signal is modulated up, or demodulated down, using a pair of complementary, aperiodic mixing signals. The use of aperiodic mixing signals allows a fully-integrated transceiver to be built. Several embodiments of the active mixer are also presented, including those having electrically-adjustable performance and allowing multiple RF signal inputs. This allows the topology of the invention to be employed in multi-band, multi-frequency applications, while still providing high performance.

Abstract translation: 需要一种便宜，高性能，完全可集成的多标准收发器。 本发明提供满足这种需求的拓扑结构，其包括：有源混频器，其后是高通滤波器和无源混频器。 输入信号使用一对互补的非周期混频信号进行调制或解调。 使用非周期混频信号可以构建完全集成的收发器。 还提出了有源混频器的几个实施例，包括具有电调节性能并允许多个RF信号输入的那些实施例。 这使得本发明的拓扑可以用于多频带，多频率应用中，同时仍然提供高性能。