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公开(公告)号：US20070058754A1
公开(公告)日：2007-03-15
申请号：US11532101
申请日：2006-09-15
申请人： Ying-Yao Lin , Fong-Ching Huang
发明人： Ying-Yao Lin , Fong-Ching Huang
IPC分类号： H04L27/22
CPC分类号： H03D3/009 , H03D2200/0029
摘要： An apparatus and a method for calibrating IQ mismatch to ensure that an in-phase oscillating signal and a quadrature-phase oscillating signal are orthogonal to each other. The apparatus includes a mixer for mixing the in-phase oscillating signal with the quadrature-phase oscillating signal to generate an output signal, a control module for determining a control signal according to a low-frequency component of the output signal, and a phase adjusting module for adjusting the phase of a specific oscillating signal to ensure that the in-phase oscillating signal and the quadrature-phase oscillating signal are orthogonal to each other. The specific oscillating signal may be the in-phase or the quadrature-phase oscillating signal. The apparatus does not require a digital signal-processing unit to perform complex calculations nor requires additional oscillating sources for calibration. Hence, the circuit design is much simplified, and the consumption of system resources is significantly reduced.
摘要翻译： 用于校准IQ失配以确保同相振荡信号和正交相位振荡信号彼此正交的装置和方法。 该装置包括：混合器，用于将同步振荡信号与正交振荡信号混频以产生输出信号;控制模块，用于根据输出信号的低频分量确定控制信号;以及相位调整 模块，用于调整特定振荡信号的相位，以确保同相振荡信号和正交振荡信号彼此正交。 特定振荡信号可以是同相或正交相位振荡信号。 该装置不需要数字信号处理单元执行复杂的计算，也不需要额外的振荡源进行校准。 因此，电路设计大大简化，系统资源的消耗明显减少。
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2.发明授权Phase and gain error control system for use in an I/Q direct conversion receiver 失效使用I / Q直接转换接收器的相位和增益误差控制系统
公开(公告)号：US5249203A
公开(公告)日：1993-09-28
申请号：US660492
申请日：1991-02-25
申请人： Roger K. Loper
发明人： Roger K. Loper
CPC分类号： H03D3/008 , H03D1/2245 , H03D2200/0025 , H03D2200/0029 , H03D2200/005 , H03D7/165
摘要： A system for controlling for gain and phase errors due to mismatches between signal channels in direct conversion receiver having a pair of signal channels carrying I and Q baseband component signals which are in quadrature. In accordance with the system new I' and Q' signals are generated which may be viewed as analogs of the I and Q baseband components but which are related to twice the phase angle defined by the original I and Q baseboard components signal components. Phase angles are determined based on the original I and Q baseband components signals and the new I' and Q' signals. An error signal is then formed from these signals which can be analyzed to determine the gain and phase errors affecting the I and Q baseband components. These components can then be adjusted to correct for gain and phase errors in order to compensate for hardware mismatches between the signal channels in the receiver.
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公开(公告)号：US08810537B2
公开(公告)日：2014-08-19
申请号：US13397643
申请日：2012-02-15
CPC分类号： G06F3/0418 , G06F3/044 , H03D2200/0029
摘要： Demodulation circuits and processes for demodulating touch signals from a touch sensor using the demodulation circuits are provided. The demodulation circuits can include circuitry configured to determine an adjustable phase delay based at least in part on a quadrature component of the touch signal or the phase-adjusted touch signal. The demodulation circuit can further include circuitry for applying the adjustable phase delay to the touch signal to compensate for phase delays in the touch signal caused by the touch sensor and/or other components. The demodulation circuit can dynamically change the adjustable phase delay to compensate for time-varying phase delays caused by the touch sensor and/or other components.
摘要翻译： 提供了使用解调电路解调来自触摸传感器的触摸信号的解调电路和处理。 解调电路可以包括被配置为至少部分地基于触摸信号的正交分量或相位调整的触摸信号来确定可调节的相位延迟的电路。 解调电路还可以包括用于将可调相位延迟施加到触摸信号以补偿由触摸传感器和/或其它部件引起的触摸信号中的相位延迟的电路。 解调电路可以动态地改变可调相位延迟，以补偿由触摸传感器和/或其他部件引起的时变相位延迟。
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4.发明授权System for controlling phase and gain errors in an I/Q direct conversion receiver 失效用于控制I / Q直接转换接收器中的相位和增益误差的系统
公开(公告)号：US5230099A
公开(公告)日：1993-07-20
申请号：US645376
申请日：1991-01-24
申请人： Roger K. Loper
发明人： Roger K. Loper
CPC分类号： H03D1/2245 , H03D3/008 , H04B1/30 , H03D2200/0025 , H03D2200/0029 , H03D2200/005 , H03D7/165
摘要： A system for detecting and controlling gain and phase errors in a direct conversion receiver having a pair of signal channels carrying I and Q baseband signal components which are in quadrature and are a function of a phase angle .theta.. The system operates by generating I' and Q' signals which correspond to sin(2.theta.) and cos(2.theta.). These I' and Q' signals are then normalized with respect to signal amplitude and filtered to produce signals DC.sub.I and DC.sub.Q corresponding to their DC components. The resulting signals DC.sub.I and DC.sub.Q have been discovered to be separately correlated with the gain and phase errors, respectively, and are used in adjusting the original I and Q baseband signal components to correct for any such errors existing between them.
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5.发明授权Compensation system for dynamically tracking and nulling local oscillator feedthrough 失效用于动态跟踪和归零本地振荡器馈通的补偿系统
公开(公告)号：US5086512A
公开(公告)日：1992-02-04
申请号：US455209
申请日：1989-12-21
申请人： Manfred U. Bartz
发明人： Manfred U. Bartz
CPC分类号： H04B1/12 , H03D7/00 , H03D2200/0025 , H03D2200/0029 , H03D2200/0052 , H03D2200/009
摘要： Local oscillator feedthrough in a superheterodyne receiver is eliminated by a servo loop-controlled compensation circuit that dynamically tracks the feedthrough signal and adjusts both the phase and amplitude of a compensating signal as needed to maintain the level of the feedthrough signal below a threshold value.
摘要翻译： 通过伺服环路控制的补偿电路来消除超外差接收机中的本地振荡器馈通，该电路可动态跟踪馈通信号，并根据需要调整补偿信号的相位和幅度，以保持馈通信号的电平低于阈值。
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公开(公告)号：US20130207906A1
公开(公告)日：2013-08-15
申请号：US13397643
申请日：2012-02-15
IPC分类号： G06F3/041
CPC分类号： G06F3/0418 , G06F3/044 , H03D2200/0029
摘要： Demodulation circuits and processes for demodulating touch signals from a touch sensor using the demodulation circuits are provided. The demodulation circuits can include circuitry configured to determine an adjustable phase delay based at least in part on a quadrature component of the touch signal or the phase-adjusted touch signal. The demodulation circuit can further include circuitry for applying the adjustable phase delay to the touch signal to compensate for phase delays in the touch signal caused by the touch sensor and/or other components. The demodulation circuit can dynamically change the adjustable phase delay to compensate for time-varying phase delays caused by the touch sensor and/or other components.
摘要翻译： 提供了使用解调电路解调来自触摸传感器的触摸信号的解调电路和处理。 解调电路可以包括被配置为至少部分地基于触摸信号的正交分量或相位调整的触摸信号来确定可调节的相位延迟的电路。 解调电路还可以包括用于将可调相位延迟施加到触摸信号以补偿由触摸传感器和/或其它部件引起的触摸信号中的相位延迟的电路。 解调电路可以动态地改变可调相位延迟，以补偿由触摸传感器和/或其他部件引起的时变相位延迟。
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公开(公告)号：US08325794B2
公开(公告)日：2012-12-04
申请号：US11532101
申请日：2006-09-15
申请人： Ying-Yao Lin , Fong-Ching Huang
发明人： Ying-Yao Lin , Fong-Ching Huang
CPC分类号： H03D3/009 , H03D2200/0029
摘要： An apparatus and a method for calibrating IQ mismatch to ensure that an in-phase oscillating signal and a quadrature-phase oscillating signal are orthogonal to each other. The apparatus includes a mixer for mixing the in-phase oscillating signal with the quadrature-phase oscillating signal to generate an output signal, a control module for determining a control signal according to a low-frequency component of the output signal, and a phase adjusting module for adjusting the phase of a specific oscillating signal to ensure that the in-phase oscillating signal and the quadrature-phase oscillating signal are orthogonal to each other. The specific oscillating signal may be the in-phase or the quadrature-phase oscillating signal. The apparatus does not require a digital signal-processing unit to perform complex calculations nor requires additional oscillating sources for calibration. Hence, the circuit design is much simplified, and the consumption of system resources is significantly reduced.
摘要翻译： 用于校准IQ失配以确保同相振荡信号和正交相位振荡信号彼此正交的装置和方法。 该装置包括：混合器，用于将同步振荡信号与正交振荡信号混频以产生输出信号;控制模块，用于根据输出信号的低频分量确定控制信号;以及相位调整 模块，用于调整特定振荡信号的相位，以确保同相振荡信号和正交振荡信号彼此正交。 特定振荡信号可以是同相或正交相位振荡信号。 该装置不需要数字信号处理单元执行复杂的计算，也不需要额外的振荡源进行校准。 因此，电路设计大大简化，系统资源的消耗明显减少。
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公开(公告)号：US4987374A
公开(公告)日：1991-01-22
申请号：US417375
申请日：1989-10-05
申请人： Dennis E. Burke
发明人： Dennis E. Burke
IPC分类号： H03D3/00 , H03D7/16 , H04L27/152
CPC分类号： H03D3/002 , H03D3/007 , H04L27/106 , H04L27/1525 , H03D2200/0029 , H03D2200/005 , H03D7/165
摘要： An improved multilevel FSK demodulator, according to the invention, is provided that down-converts the IF frequency back to baseband quadrature via dual mixers. The improved multilevel FSK demodulator uses time-delay demodulation. This method requires a .+-.90.degree. phase difference between 2 modulated signals to produce a maximum demodulated output amplitude at the maximum frequency deviation. Since the IF frequencies have been down-converted back to baseband quadrature, these 2 signals are only "out of phase" by an amount .DELTA.t that is equal to 90.degree./d.omega.. For a .DELTA..omega.of 4 MHz, this gives a .DELTA.t=62.5 nonoseconds. As a result, it is easy to achieve a delay line using multiple tap positions for 62.5 nonoseconds total delay.
摘要翻译： 提供了根据本发明的改进的多级FSK解调器，其通过双重混频器将IF频率下变频到基带正交。 改进的多级FSK解调器使用时延解调。 该方法需要2个调制信号之间的+/- 90°相位差，以在最大频率偏差下产生最大解调输出幅度。 由于IF频率已被下变频回到基带正交，所以这两个信号只有“相位不同”的DELTA t等于90°/dω。 对于4 MHz的DELTA omega，这给出了一个DELTA t = 62.5非偶数。 因此，很容易实现使用多个分接头位置的延迟线，用于62.5非安全总延迟。
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公开(公告)号：US5862466A
公开(公告)日：1999-01-19
申请号：US781564
申请日：1997-01-09
申请人： Bruce A. Erickson
发明人： Bruce A. Erickson
CPC分类号： H03D7/00 , H03D2200/0003 , H03D2200/0023 , H03D2200/0029 , H03D2200/009 , H03D7/02 , H03D7/1408 , H03D9/06 , H03D9/0633
摘要： An automatic balancing circuit for a radio frequency mixer which reduces LO-IF signal leakage, as well as minimizing second order harmonic distortion products is described. The circuit couples to in-phase and out-of-phase signal lines originating from the mixer, and comprises a differential gain network, a differential phase shift network and a combiner. The networks operate under the control of a microprocessor, which adjusts the networks so that the LO leakage signals, when combined, are almost completely eliminated.
摘要翻译： 描述了用于降低LO-IF信号泄漏的射频混频器的自动平衡电路以及最小二次谐波失真产物。 电路耦合到源自混频器的同相和异相信号线，并且包括差分增益网络，差分相移网络和组合器。 网络在微处理器的控制下运行，微处理器调整网络，使得组合时的LO泄漏信号几乎完全消除。
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公开(公告)号：US5635876A
公开(公告)日：1997-06-03
申请号：US316628
申请日：1994-09-30
CPC分类号： H03L7/06 , H03B5/1215 , H03B5/1231 , H03B5/1243 , H03B5/129 , H03D1/2254 , H03B2200/004 , H03B27/00 , H03D2200/0025 , H03D2200/0029
摘要： The correction circuit comprises a first quadrature phase comparator intended to receive as input two signals which are desired to be in quadrature and to have equal amplitudes. Phase adjustment means are firstly intended to correct the phase of at least one of the signal to re-establish a phase difference of 90.degree. therebetween. The correction circuit further comprises means to effectuate the sum and the difference of the signals which it receives as input and to supply the sum and the difference to a second quadrature phase comparator intended to supply as output a second error signal representative of the difference of the effective phase shift of these calculated signals and 90.degree.. The second error signal is finally supplied to amplitude adjustment means intended to correct the amplitude of at least one of said signals.
摘要翻译： 校正电路包括第一正交相位比较器，用于接收期望为正交并且具有相等振幅的输入两个信号作为输入。 相位调整装置首先旨在校正至少一个信号的相位，以在其间重新建立90°的相位差。 校正电路还包括用于实现其作为输入接收的信号的总和和差值的装置，并且将和值和差值提供给第二正交相位比较器，该第二正交相位比较器旨在作为输出提供表示第二差分信号的第二误差信号 这些计算信号有效相移90°。 第二误差信号最终被提供给旨在校正至少一个所述信号的振幅的幅度调节装置。
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