公开(公告)号：EP2637311B1

公开(公告)日：2016-12-07

申请号：EP12158582.2

申请日：2012-03-08

申请人： Intel Deutschland GmbH

发明人： Nitsche, Gunnar ,  Müller, Peter

IPC分类号： H04B1/30 ,  H03D3/00 ,  H04L25/06

CPC分类号： H04B1/30 ,  H03D3/008 ,  H03D2200/0045 ,  H03D2200/0047 ,  H04L25/061

公开(公告)号：EP3091702A1

公开(公告)日：2016-11-09

申请号：EP15733140.6

申请日：2015-01-02

申请人： Samsung Electronics Co., Ltd.

发明人： ROH, Yi-Ju ,  KIM, Ji-Hoon ,  SON, Ju-Ho ,  SHIM, Yun-A ,  LEE, Dong-Hyun ,  JUNG, Dong-Yun ,  CHOI, Sung-Tae ,  HONG, Seung-Pyo

IPC分类号： H04L25/03

CPC分类号： H04L25/06 ,  H03D2200/0047 ,  H04B1/30 ,  H04B2001/305

摘要： The present invention relates to a method and an apparatus for direct current offset calibration of a direct conversion receiver, a Direct Current (DC) offset calibration apparatus of a direct conversion receiver includes a plurality of variable gain amplifiers for amplifying an input signal based on a gain control value, a DC offset monitoring unit for monitoring a DC offset for an output signal of the plurality of variable gain amplifiers, a plurality of variable Digital to Analog Converters (DACs) for controlling a current applied to each of the plurality of variable gain amplifiers according to a current control code, and a DC offset cancellation unit for determining a current control code set which minimizes the DC offset value per preset gain control value, and thus the DC offset can be precisely cancelled without being affected by external factors such as a signal modulation method and heat and performance degradation of the receiver can be prevented.

摘要翻译： 本发明涉及一种用于直接转换接收机的直流偏移校准的方法和装置，直接转换接收机的直流（DC）偏移校准装置包括多个可变增益放大器，用于基于 增益控制值，用于监视所述多个可变增益放大器的输出信号的DC偏移的DC偏移监视单元，用于控制施加到所述多个可变增益中的每一个的可变增益放大器的多个可变数字到模拟转换器（DAC） 根据当前控制码的放大器以及用于确定使每个预设增益控制值的DC偏移值最小化的电流控制码集的DC偏移消除单元，因此可以精确地消除DC偏移，而不受外部因素的影响，例如 可以防止信号调制方法和接收机的热和性能劣化。

公开(公告)号：EP2637312A1

公开(公告)日：2013-09-11

申请号：EP12158600.2

申请日：2012-03-08

申请人： Intel Mobile Communications GmbH

发明人： Müller, Peter ,  Nitsche, Gunnar

IPC分类号： H04B1/30 ,  H03D3/00 ,  H04L25/06

CPC分类号： H04B1/30 ,  H03D1/2245 ,  H03D2200/0047 ,  H04L25/063

摘要： The present invention relates to Method for compensating DC offset in a signal path comprising a plurality of stages, wherein for each stage a fine DC compensation is performed by introducing a fine DC compensation signal into the signal path of said stage by means of the compensation analog to digital converter, wherein said fine DC compensation signal is determined by setting the total gain of said stage to a value that equals the product of a first total gain of the preceding stage(s) and a first gain of said stage, setting at least two different DC compensation signals for said stage and measuring a DC residual signal at the output of the signal path for each of the two different DC compensation signals in order to determine a first linear relationship between DC compensation signal and DC offset residual at the output of said signal path, setting the total gain of said stage to a value that equals the product of a second total gain of the preceding stage(s) and a second gain of said stage, setting at least two different DC compensation signals and measuring a DC residual signal at the output of the signal path for each of the two different DC compensation signals in order to determine a second linear relationship between DC compensation value and gain, and determining an interception point of said first linear relationship and said second linear relationship, wherein the DC compensation signal of said interception point is the fine DC compensation signal.

摘要翻译： 本发明涉及用于补偿包括多个级的信号路径中的DC偏移的方法，其中对于每一级，通过借助于补偿模拟信号将精细DC补偿信号引入所述级的信号路径来执行精细DC补偿 其中所述精细DC补偿信号通过将所述级的总增益设置为等于前一级的第一总增益与所述级的第一增益的乘积的值来确定，至少设置 用于所述级的两个不同的DC补偿信号，并且测量两个不同DC补偿信号中的每一个的信号路径的输出处的DC残留信号，以便确定DC补偿信号与DC补偿信号的输出处的DC偏移残差之间的第一线性关系 所述信号路径，将所述级的总增益设置为等于前一级的第二总增益与第二增益的乘积的值 id级，设置至少两个不同的DC补偿信号，并且测量两个不同DC补偿信号中的每一个的信号路径的输出处的DC残留信号，以便确定DC补偿值和增益之间的第二线性关系，以及确定 所述第一线性关系和所述第二线性关系的截取点，其中所述截取点的DC补偿信号是精细直流补偿信号。

公开(公告)号：EP2308169A2

公开(公告)日：2011-04-13

申请号：EP09770806.9

申请日：2009-06-19

申请人： Skyworks Solutions, Inc.

发明人： PULLELA, Rajasekhar ,  ROZENBLIT, Dmitriy ,  FIROUZKOUHI, Hamid

IPC分类号： H03D7/00

CPC分类号： H03D7/1441 ,  H03D7/1458 ,  H03D7/1483 ,  H03D7/165 ,  H03D2200/0047 ,  H03D2200/0086

摘要： A method of supplying refrigeration to air separation plants within an air separation plant facility in which a refrigerant stream is produced at cryogenic temperature within a centralized refrigeration system. Streams of the refrigerant at the cryogenic temperature are introduced into the air separation plants such that all or a part of the refrigeration requirements of the air separation plants are supplied by the streams of the refrigerant.

公开(公告)号：EP2075908A2

公开(公告)日：2009-07-01

申请号：EP09155818.9

申请日：2005-05-02

申请人： Telegent Systems, Inc.

发明人： Yun, Weijie ,  Sheng, Samuel ,  Yee, Dennis

IPC分类号： H03D3/00

CPC分类号： H03D3/008 ,  H03D7/165 ,  H03D2200/0047 ,  H04L25/061 ,  H04L27/063 ,  H04N5/44 ,  H04N5/455 ,  H04N5/50 ,  H04N5/63

摘要： An analog video receiver implemented in an integrated circuit device. The analog video receiver includes an amplifier to amplify an analog video signal having a desired carrier frequency, and a mixing circuit to mix the amplified analog video signal with a complex sinusoid having a frequency substantially equal to the carrier frequency.

摘要翻译： 在集成电路器件中实现的模拟视频接收器。 模拟视频接收机包括用于放大具有期望载波频率的模拟视频信号的放大器，以及混合电路，用于将放大的模拟视频信号与具有基本上等于载波频率的频率的复数正弦曲线混合。

公开(公告)号：EP1969717A1

公开(公告)日：2008-09-17

申请号：EP06840433.4

申请日：2006-12-06

申请人： SiRiFIC Wireless Corporation

发明人： EMBABI, Sherif, H. K. ,  HOLDEN, Alan, R. ,  JAEHNIG, Jason, P. ,  BELLAOUAR, Abdellatif

IPC分类号： H03D7/18

CPC分类号： H03D7/1441 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1466 ,  H03D2200/0047 ,  H03D2200/0088

摘要： A passive CMOS differential mixer circuit with a mismatch correction circuit for balancing the electrical characteristics of the two output paths. Once the output paths of the differential circuit are balanced, or matched as closely as possible, second order intermodulation product generation can be inhibited or at least reduced to acceptable levels. The mismatch correction circuit receives a digital offset signal, and generates one or more voltage signals to be selectively applied to the signal paths of the passive differential mixer circuit. The voltage signals can be adjusted back gate bias voltages applied to the bulk terminals of selected transistors to adjust their threshold voltages, or the voltage signals can be adjusted common mode voltages applied directly to a selected signal path. Since the differential mixer circuit is passive, no DC current contribution to noise is generated. The switching transistors of the mixer circuit can be maintained at minimal dimensions to reduce switching signal drive loading, resulting in lower power consumption and higher operating frequencies than if larger switching transistors were used

公开(公告)号：EP1784913B1

公开(公告)日：2008-05-07

申请号：EP05761202.0

申请日：2005-07-01

申请人： ACP ADVANCED CIRCUIT PURSUIT AG

发明人： HUANG, Qiuting ,  ROGIN, Jürgen

IPC分类号： H03D7/14

CPC分类号： H03D7/1441 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1483 ,  H03D7/1491 ,  H03D2200/0043 ,  H03D2200/0047 ,  H03D2200/0084

摘要： A double balanced mixer has a DC detection circuit connected to receive the output of the mixer core. The detected level is applied to adjust the duty cycle of the transistors of the mixer core. In one example, this adjusting level is added to the local oscillator signals that are applied to the core. In another example, the level is applied to adjust the threshold of the transistors of the mixer core. In a further example, the duty cycle of the local oscillator signals is adjusted before it is applied to the mixer core Also provided is an input stage for a double balanced mixer core, which comprises a transistor having a low pass filter as a feedback circuit.

公开(公告)号：EP1622260A2

公开(公告)日：2006-02-01

申请号：EP05016435.9

申请日：2005-07-28

申请人： Integrant Technologies Inc.

发明人： Kim, Tae Wook ,  Kim, Bonkee ,  Lee, Kwyro

IPC分类号： H03F3/45

CPC分类号： H03D7/1441 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0043 ,  H03D2200/0047 ,  H03F1/3211 ,  H03F3/45183

摘要： The present invention relates to a differential amplifier and a mixer for improving the linearity. The differential amplifier circuit according to this present invention, includes first and second load stages each having a predetermined voltage value, a main differential amplifier unit having a first differential stage that forms a differential pair in such a way as to amplify a difference between a first input voltage and a second input voltage, and a constant current source, which has a predetermined current driving capability and is connected serially between a power source voltage terminal and a ground terminal, and a auxiliary differential amplifier unit having a second differential stage that forms a differential pair in such a way as to amplify a difference between a third input voltage and a fourth input voltage connected between the first load stage and a second load stage, and the ground, respectively.

摘要翻译： 本发明涉及一种用于提高线性度的差分放大器和混频器。 根据本发明的差分放大器电路包括具有预定电压值的第一和第二负载级，具有形成差分对的第一差分级的主差分放大器单元，以便放大第一和第二负载级之间的差异 输入电压和第二输入电压，以及恒定电流源，其具有预定的电流驱动能力并且串联地连接在电源电压端子和接地端子之间;以及辅助差分放大器单元，具有形成第二差分级的辅助差分放大器单元 差分对以分别放大连接在第一负载级与第二负载级之间的第三输入电压与第四输入电压之间的差的方式和地。

公开(公告)号：EP1329028A4

公开(公告)日：2004-10-13

申请号：EP01970746

申请日：2001-09-10

申请人： CONEXANT SYSTEMS INC

发明人： MOLNAR ALYOSHA C ,  MAGOON RAHUL

IPC分类号： H03D7/14 ,  H04B1/26 ,  H04B1/28 ,  H04B1/30 ,  H04L27/22 ,  H04L27/38

CPC分类号： H04B1/30 ,  H03D7/1408 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1475 ,  H03D2200/0047 ,  H03D2200/0088 ,  H04B1/28

摘要： A subharmonic mixer (510) has two switching stages is used to improved mixer gain in a direct downconversion receiver (500). The first switching stage mixes a received RF signal (520) to an intermediate frequency that is one-half of the RF signal frequency. The second switching stage mixes the intermediate signal to baseband. By connecting the two switching stages in series, current is reused and harmonic content from the first stage is fed into the second stage thereby improving the mixer gain.

公开(公告)号：EP0909479B1

公开(公告)日：2004-04-21

申请号：EP98920924.2

申请日：1998-04-30

申请人： TelASIC Communications, Inc.

发明人： CHEN, Ricky, Y. ,  LINDER, Lloyd, F. ,  DEVENDORF, Don, C. ,  GORDER, Matthew, S.

IPC分类号： H03G1/00

CPC分类号： H03G1/0023 ,  H03D7/1408 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0025 ,  H03D2200/0047

摘要： A 'gain control differential pair' (GCDP) (10) conducts current in response to a differential drive signal, with the gain of a signal path formed via the current circuit of one of its transistors controlled by the drive signal. The GCDP is preferably driven with a drive circuit (20) that receives a symmetrical input signal and produces an offset differential drive signal which has the effect of keeping one of the GCDP's transistors turned off over a wider portion of a symmetrical input signal's voltage range, thereby reducing GCDP-caused noise. One or more GCDPs are implemented as part of a Gilbert mixer (30) to regulate the amount of RF current that flows between the mixer's output and input stages, which eliminates the need to provide gain control in other circuits fed by the mixer. When driven with an offset drive signal, the Gilbert mixer simultaneously provides gain control, low distortion, low power consumption and excellent LO/RF isolation.