公开(公告)号：US09197161B2

公开(公告)日：2015-11-24

申请号：US12553525

申请日：2009-09-03

申请人： Bhushan S. Asuri ,  Hongyan Yan

发明人： Bhushan S. Asuri ,  Hongyan Yan

IPC分类号： H04L25/34 ,  H04L25/49 ,  H03D7/18 ,  H03K4/02

CPC分类号： H03D7/18 ,  H03D2200/0086 ,  H03K4/026

摘要： The mixer of a transmit chain of a wireless transmitter (such as the transmitter of a cellular telephone handset) is driven with low third harmonic in-phase (I) and quadrature (Q) signals. The low third harmonic I and Q signals have three or more signal levels, and transition between the these three or more signal levels at times such that each of the I and Q signals approximates a sine wave and has minimal third harmonic spectral components. In one example, reducing the third harmonic components of the I and Q signals simplifies design of amplifier stages of the transmitter and helps reduce receive band noise.

摘要翻译： 无线发射机（例如蜂窝电话听筒的发射机）的发射链的混频器由低三次谐波同相（I）和正交（Q）信号驱动。 低三次谐波I和Q信号具有三个或更多个信号电平，以及这些三个或更多个信号电平之间的转变，这些时间使得I和Q信号中的每一个接近正弦波并且具有最小的三次谐波频谱分量。 在一个示例中，减小I和Q信号的三次谐波分量简化了发射机的放大器级的设计，并有助于降低接收频带噪声。

公开(公告)号：US09184776B2

公开(公告)日：2015-11-10

申请号：US13004755

申请日：2011-01-11

申请人： John Tryhub ,  Lance Greggain ,  Gary Cheng ,  Stephen Jantzi

发明人： John Tryhub ,  Lance Greggain ,  Gary Cheng ,  Stephen Jantzi

IPC分类号： H04B1/28 ,  H04B1/10 ,  H03D7/18

CPC分类号： H04B1/28 ,  H03D7/18 ,  H04B1/1027

摘要： In a method and apparatus for operating a super-heterodyne receiver, a tuning circuit has a local oscillator for frequency shifting a desired channel to a selected frequency and a controller for controlling the local oscillator. The controller determines for each of a number of identified channels, whether an image signal is present at frequencies in the spectrum that when tuned to a first selected frequency interfere, and is operable to select a modified selected frequency at which interference between the image signal and the identified channel is reduced.

摘要翻译： 在用于操作超外差接收机的方法和装置中，调谐电路具有用于将期望信道频移到所选频率的本地振荡器和用于控制本地振荡器的控制器。 控制器为多个识别的通道中的每一个确定图像信号是否存在于当调谐到第一选定频率的干扰时频谱中的频率，并且可操作以选择经修改的选定频率，其中图像信号和 所识别的通道减少。

公开(公告)号：US09020458B2

公开(公告)日：2015-04-28

申请号：US13901320

申请日：2013-05-23

申请人： QUALCOMM Incorporated

发明人： Jeremy Mark Goldblatt

IPC分类号： H04B1/28 ,  H04L25/03 ,  H03D7/14 ,  H03D7/16 ,  H03D7/18

CPC分类号： H04L25/03878 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D7/18 ,  H03D2200/0088

摘要： A passive mixer with channel impedance equalization is disclosed. In an exemplary embodiment, an apparatus includes replica devices configured to generate replica output signals and an error amplifier configured to generate bias signals based on the replica output signals. The bias signals are configured to equalize on-state channel impedances associated with a mixer.

摘要翻译： 公开了一种具有通道阻抗均衡的无源混频器。 在示例性实施例中，一种装置包括被配置为产生副本输出信号的复制设备和被配置为基于复制输出信号产生偏置信号的误差放大器。 偏置信号被配置为均衡与混频器相关联的通态阻抗。

公开(公告)号：US08957722B2

公开(公告)日：2015-02-17

申请号：US14042054

申请日：2013-09-30

申请人： ViaSat, Inc.

发明人： Rob Zienkewicz ,  Kenneth Buer

IPC分类号： G06G7/12 ,  H03D7/14 ,  H03D7/16 ,  H03D7/18

CPC分类号： H03D7/1458 ,  H03D7/165 ,  H03D7/18 ,  H03D2200/0082

摘要： A double balanced image reject mixer (IRM) can be configured to comprise: a common radio frequency (RF) port; four mixer devices, each comprising an intermediate frequency (IF) port, an RF port and an local oscillator (LO) port; and a four-way, in-phase splitter/combiner. The four-way, in-phase splitter/combiner can be connected between the RF common port and the RF port of each of the four mixer devices. A method of performing spurious suppression and image reject mixing in a double balanced IRM, can comprise: directly in-phase combining radio frequency (RF) output signals of four mixer devices located in the double balanced IRM; and phase pairing local oscillator (LO) signals and intermediate frequency (IF) signals such that the combination of the phases of the respective IF and LO signals can result in substantially equal phase RF signals at the RF ports of all four mixer devices.

摘要翻译： 双平衡图像拒绝混合器（IRM）可以被配置为包括：公共射频（RF）端口; 四个混频器设备，每个混频器设备包括中频（IF）端口，RF端口和本地振荡器（LO）端口; 和四路同相分路器/组合器。 四路同相分路器/组合器可以连接在四个混频器设备中的每个的RF公共端口和RF端口之间。 在双平衡IRM中执行伪抑制和图像拒绝混合的方法可以包括：直接同步地组合位于双平衡IRM中的四个混频器设备的射频（RF）输出信号; 以及相位配对本地振荡器（LO）信号和中频（IF）信号，使得各个IF和LO信号的相位的组合可导致在所有四个混频器装置的RF端口处的基本相等的相位RF信号。

公开(公告)号：US06952572B2

公开(公告)日：2005-10-04

申请号：US09885487

申请日：2001-06-20

申请人： Ka Hung Derek Wong ,  Ten Voon Wong

发明人： Ka Hung Derek Wong ,  Ten Voon Wong

IPC分类号： H03D7/18 ,  H04B1/28 ,  H04B1/26

CPC分类号： H03D7/18 ,  H04B1/28

摘要： An image rejection mixer includes first and second mixers, a phase shift circuit and a summer. The first mixer receives an RF input signal and a first local oscillator (LO) signal and generates a first intermediate frequency (IF) output signal. The second mixer receives the RF input signal and a second LO signal and generates a second IF output signal. The first LO signal is a phase lag signal (sin ωlot) and the second LO signal is a phase lead signal (−cos ωlot), where ωlot is a frequency signal generated by a local oscillator. The phase shift circuit is connected between the summer and the first mixer, receives the first IF output signal and generates a phase lag signal. The phase shift circuit causes the phase lag signal to lag the first IF output signal by about 90 degrees. The summer is connected to the phase shift circuit and the second mixer, receives the second IF output signal and the phase lag signal, and generates a combined IF output signal. The image rejection mixer is switchable between high and low side injection simply by inverting the second LO signal.

摘要翻译： 镜像抑制混频器包括第一和第二混频器，相移电路和夏季。 第一混频器接收RF输入信号和第一本地振荡器（LO）信号，并产生第一中频（IF）输出信号。 第二混频器接收RF输入信号和第二LO信号并产生第二IF输出信号。 第一LO信号是相位滞后信号（sinω），而第二LO信号是相位超前信号（-cosωωτt），其中ωω< t是由本地振荡器产生的频率信号。 相移电路连接在加法器和第一混频器之间，接收第一IF输出信号并产生相位滞后信号。 相移电路使相位延迟信号使第一IF输出信号滞后约90度。 夏季连接到相移电路和第二混频器，接收第二IF输出信号和相位滞后信号，并产生组合的IF输出信号。 通过反转第二LO信号，镜像抑制混频器可在高低端注入之间切换。

公开(公告)号：US06865381B2

公开(公告)日：2005-03-08

申请号：US10388398

申请日：2003-03-17

申请人： Pieter Vorenkamp ,  Klaas Bult ,  Frank Carr

发明人： Pieter Vorenkamp ,  Klaas Bult ,  Frank Carr

IPC分类号： H01F17/00 ,  H01L23/522 ,  H01L27/02 ,  H01L27/08 ,  H03B5/12 ,  H03B5/36 ,  H03D3/18 ,  H03D7/16 ,  H03D7/18 ,  H03G1/00 ,  H03H11/12 ,  H03J1/00 ,  H03J3/04 ,  H03J3/08 ,  H03J3/18 ,  H03L7/10 ,  H03L7/23 ,  H04B1/00

CPC分类号： H03D3/18 ,  H01F17/0006 ,  H01F17/0013 ,  H01F27/34 ,  H01F27/40 ,  H01F27/42 ,  H01F2017/0053 ,  H01F2021/125 ,  H01L23/5227 ,  H01L27/0248 ,  H01L27/0251 ,  H01L27/08 ,  H01L2924/0002 ,  H01L2924/3011 ,  H03B5/04 ,  H03B5/364 ,  H03D7/161 ,  H03D7/18 ,  H03F1/26 ,  H03F1/3211 ,  H03F3/195 ,  H03F3/45183 ,  H03F3/45188 ,  H03F3/68 ,  H03F3/72 ,  H03F2200/111 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/447 ,  H03F2200/63 ,  H03F2203/45264 ,  H03F2203/45286 ,  H03G1/0023 ,  H03G1/0029 ,  H03G3/3052 ,  H03H7/25 ,  H03H11/04 ,  H03H11/1291 ,  H03H11/53 ,  H03H11/54 ,  H03H19/004 ,  H03J1/0075 ,  H03J3/04 ,  H03J3/08 ,  H03J3/185 ,  H03J2200/10 ,  H03L7/10 ,  H03L7/183 ,  H03L7/23 ,  H03L2207/06 ,  H01L2924/00

摘要： An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circuitry advantageously uses LC filters integrated onto the substrate in conjunction with image reject mixers to provide sufficient image frequency rejection. Filter tuning and inductor Q compensation over temperature are performed on chip. The filters utilize multi track spiral inductors. The filters are tuned using local oscillators to tune a substitute filter, and frequency scaling during filter component values to those of the filter being tuned. In conjunction with filtering, frequency planning provides additional image rejection. The advantageous choice of local oscillator signal generation methods on chip is by PLL out of band local oscillation and by direct synthesis for in band local oscillator. The VCOs in the PLLs are centered using a control circuit to center the tuning capacitance range. A differential crystal oscillator is advantageously used as a frequency reference. Differential signal transmission is advantageously used throughout the receiver.

公开(公告)号：US20050030108A1

公开(公告)日：2005-02-10

申请号：US10665631

申请日：2003-09-22

申请人： Ralph Duncan ,  Tom Kwan

发明人： Ralph Duncan ,  Tom Kwan

IPC分类号： H01F17/00 ,  H01L23/522 ,  H01L27/02 ,  H01L27/08 ,  H03B1/00 ,  H03B5/12 ,  H03B5/36 ,  H03D7/16 ,  H03D7/18 ,  H03G1/00 ,  H03H11/12 ,  H03J1/00 ,  H03J3/04 ,  H03J3/08 ,  H03J3/18 ,  H03L1/02 ,  H03L7/10 ,  H03L7/23 ,  H03L7/00

CPC分类号： H03L7/23 ,  H01F17/0006 ,  H01F17/0013 ,  H01F2017/0053 ,  H01F2021/125 ,  H01L23/5227 ,  H01L27/0248 ,  H01L27/08 ,  H01L2924/0002 ,  H01L2924/09701 ,  H01L2924/3011 ,  H03B5/1209 ,  H03B5/1212 ,  H03B5/1228 ,  H03B5/1253 ,  H03B5/364 ,  H03B2200/0038 ,  H03B2201/025 ,  H03B2201/0266 ,  H03D7/161 ,  H03D7/18 ,  H03G1/0029 ,  H03H11/1291 ,  H03J1/0075 ,  H03J3/04 ,  H03J3/08 ,  H03J3/185 ,  H03J2200/10 ,  H03L1/023 ,  H03L7/10 ,  H01L2924/00

摘要： An integrated VCO having an improved tuning range over process and temperature variations. There is therefore provided in a present embodiment of the invention an integrated VCO. The VCO comprises, a substrate, a VCO tuning control circuit responsive to a VCO state variable that is disposed upon the substrate, and a VCO disposed upon the substrate, having a tuning control voltage input falling within a VCO tuning range for adjusting a VCO frequency output, and having its tuning range adjusted by the tuning control circuit in response to the VCO state variable.

摘要翻译： 具有改进的调谐范围超过过程和温度变化的集成VCO。 因此，在本发明的本实施例中提供了集成VCO。 VCO包括：衬底，响应于设置在衬底上的VCO状态变量的VCO调谐控制电路，以及设置在衬底上的VCO，具有落在VCO调谐范围内的调谐控制电压输入，用于调节VCO频率 输出，并且其调谐范围由调谐控制电路响应于VCO状态变量而调整。

公开(公告)号：US6137852A

公开(公告)日：2000-10-24

申请号：US996903

申请日：1997-12-23

申请人： Michael McGinn ,  David Kevin Lovelace

发明人： Michael McGinn ,  David Kevin Lovelace

IPC分类号： H03D7/18 ,  H03D3/24

CPC分类号： H03D7/18

摘要： An image reject receiver (10) uses a mixer circuit (12) and a mixer circuit (16) to frequency translate an incoming reference signal (RF.sub.IN) and generate a first output signal (V.sub.OUT1) and a second output signal (V.sub.OUT2), respectively. Two phase detectors (26 and 36) measure a phase difference between the first and second output signals (V.sub.OUT1, and V.sub.OUT2) and a difference circuit (30) provides a difference value in accordance with the phase difference. The difference value cancels any phase shift due to time delays associated with the phase detectors (26 and 36). The difference value is fed back to a phase shift circuit (20) for adjusting the phase of the second output signal (V.sub.OUT2) and locking the first output signal (V.sub.OUT1) in-phase with the second output signal (V.sub.OUT2).

摘要翻译： 图像拒绝接收器（10）使用混频器电路（12）和混频器电路（16）对输入的参考信号（RFIN）进行频率转换，并分别产生第一输出信号（VOUT1）和第二输出信号（VOUT2） 。 两相检测器（26和36）测量第一和第二输出信号（VOUT1和VOUT2）之间的相位差，差分电路（30）根据相位差提供差值。 差值消除由于与相位检测器（26和36）相关联的时间延迟引起的任何相移。 该差值被反馈到用于调节第二输出信号（VOUT2）的相位并且与第二输出信号（VOUT2）同相锁定第一输出信号（VOUT1）的相移电路（20）。

公开(公告)号：US6127962A

公开(公告)日：2000-10-03

申请号：US97261

申请日：1998-06-15

申请人： Glen D. Martinson

发明人： Glen D. Martinson

IPC分类号： H03D7/18 ,  G01S7/40

CPC分类号： H03D7/18

摘要： There is provided an image rejection mixer for downconversion of an incoming signal to a lower intermediate frequency signal, using the absolute difference of frequencies between the incoming signal and the local oscillator signal. The image rejection mixer is set up to accept and downconvert incoming signals at two discrete frequencies f.sub.h and f.sub.l, where the local oscillator frequency is positioned mid-way between those frequencies f.sub.h and f.sub.l. There are two signal paths in the image rejection mixer, either one or the other of which is chosen by positioning a controllable single pole, double throw switch into one of its two switch positions. The output of the switch is led to a mixing element, from which an intermediate frequency signal is derived. The first of the two signal paths from the input to the image rejection mixer to the mixing element has a bandpass characteristic centered at one or the other of the two input frequencies of interest; the other signal path has a bandstop characteristic centered at the same frequency. By choosing one or the other of the signal paths, an incoming signal at a designated one or the other of the incoming signal frequencies may be downconverted, and the image signal and any noise at that image signal frequency will be rejected.

摘要翻译： 提供了一个镜像抑制混频器，用于使用输入信号和本地振荡器信号之间的绝对差频将输入信号下变频到较低的中频信号。 镜像抑制混频器设置为接收和下变频两个离散频率fh和fl的输入信号，其中本地振荡器频率位于那些频率fh和fl之间的中间。 在镜像抑制混频器中有两个信号路径，其中一个或另一个通过将可控的单极双掷开关定位到其两个开关位置之一来选择。 开关的输出被引导到混频元件，从中得到中频信号。 从输入到图像抑制混频器到混合元件的两个信号路径中的第一个具有以所关注的两个输入频率中的一个或另一个为中心的带通特性; 另一个信号路径具有以相同频率为中心的阻带特性。 通过选择信号路径中的一个或另一个，可以将指定的一个或另一个输入信号频率处的输入信号下变频，并且图像信号和该图像信号频率处的任何噪声将被拒绝。

公开(公告)号：US6075980A

公开(公告)日：2000-06-13

申请号：US52399

申请日：1998-03-31

申请人： Hans-Otto Scheck

发明人： Hans-Otto Scheck

IPC分类号： H03D3/00 ,  H03D7/16 ,  H03D7/18 ,  H04L25/06 ,  H04L27/233 ,  H04Q7/20

CPC分类号： H04L27/2332 ,  H03D3/009 ,  H03D7/165 ,  H04L25/062 ,  H03D2200/0047 ,  H03D2200/009 ,  H03D7/18

摘要： An I/Q direct conversion receiver has an input (5,6) for receiving an RF signal comprising a wanted signal having in-phase and quadrature phase channels modulated onto in-phase and quadrature carrier signals. A signal splitter (7) divides the receiver RF signal into three in-phase signal components. Three substantially identical mixers (8) are provided and receive respective RF signal components for mixing with local oscillator signals. The first mixer (8a) receives the local oscillator signal shifted by 45.degree., the second mixer (8b) receives the local oscillator signal shifted by -45.degree., whilst the third mixer (8c) receives the local oscillator signal shifted by 180.degree.. A correction signal is generated by summing at a summing amplifier (11) the first and second baseband signals together with the third baseband signal after appropriate scaling. The in-phase and quadrature phase baseband signals are then corrected by combining these signals at respective comparators (13) with the correction signal.

摘要翻译： I / Q直接转换接收机具有用于接收RF信号的输入（5,6），该RF信号包括被调制到同相和正交载波信号上的同相和正交相位通道的有用信号。 信号分离器（7）将接收机RF信号分成三个同相信号分量。 提供三个基本相同的混频器（8），并接收与本地振荡器信号混合的相应的RF信号分量。 第一混频器（8a）接收偏移45°的本机振荡器信号，第二混频器（8b）接收移位了-45°的本机振荡器信号，而第三混频器（8c）接收到偏移180°的本机振荡器信号。 通过在适当缩放之后，将加法放大器（11）与第三基带信号一起与第三基带信号相加产生校正信号。 然后通过在各个比较器（13）处将这些信号与校正信号组合来校正同相和正交相位基带信号。