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1.发明授权CONTINUOUS-TIME SIGMA-DELTA ANALOG-TO-DIGITAL CONVERTER WITH CAPACITOR AND/OR RESISTANCE DIGITAL SELF-CALIBRATION MEANS FOR RC SPREAD COMPENSATION 有权具有自校准电容器和/或电阻钢筋混凝土SPREAD补偿时间连续Σ-Δ模数转换器
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公开(公告)号：EP2319173B1
公开(公告)日：2012-01-25
申请号：EP09787020.8
申请日：2009-08-25
申请人： NXP B.V.
发明人： LE GUILLOU, Yann
IPC分类号： H03D13/00
CPC分类号： H03D13/008 , H03L7/0812
摘要： A basic symmetric ∏/2 phase-detector receives four control signals that control a differential current at the detector's output. Each respective control signal is a linear combination of a respective pair of signals chosen from a first input signal, its logic complement, a second input signal and the logic complement of the latter. Operation is based on time-averaging the differential current, the result being zero at a phase difference of ∏/2. By means of adding one or more additional current sources to the output, controlled by one or more of the control signals, the basic operation is skewed. The time-averaged output current is now made zero only at a value of the phase difference different from ∏/2. In an embodiment with uniform current sources and resistors, the modified detector is configured for a phase difference of ∏/2
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公开(公告)号：EP2248261B1
公开(公告)日：2011-07-13
申请号：EP09708738.1
申请日：2009-02-03
申请人： NXP B.V.
发明人： LE GUILLOU, Yann
CPC分类号： H04N5/455 , H03L7/1976 , H03L7/23 , H04N21/4263 , H04N21/42676 , H04N21/6118
摘要： A method of operating a multi-stream reception scheme, such as DOCSIS (Data Over Cable Service Interface Specifications), comprising at least two receivers (10, 12, 14) having respective voltage controlled oscillators (16), the method including monitoring a change in local oscillator frequency in a selected one of the at least two streams and, if the frequency distance between the local oscillator frequencies is below a value likely to cause pulling or coupling between the voltage controlled oscillators of the at least two receivers, resetting the frequency planning of the selected one of the at least two streams to maximise the frequency distance of the voltage controlled oscillator of the selected stream with the voltage controlled oscillators of the or the other streams.
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公开(公告)号：EP2248257A1
公开(公告)日：2010-11-10
申请号：EP09703960.6
申请日：2009-01-20
申请人： NXP B.V.
CPC分类号： H04B1/16 , H03D3/007 , H03G3/3068 , H04B1/30
摘要： A radio receiver comprises an input (14) for a modulated radio frequency signal, a frequency down converter (16) coupled to the input, the frequency down converter including quadrature mixers (32,34) for demodulating a received modulated radio frequency signal using a local oscillator signal. An analogue-to-digital converter (54, 56) is coupled to receive demodulated signalsfrom the mixing means. The analogue-to-digital converter, which may comprise a continuous time sigma delta converter, has an input for a sampling clock frequency(f s ). A voltage controlled oscillator (38) providesthe local oscillator signaland supplies afrequency divider(60, 94) used to providethe sampling clock frequency.The dividing ratio (1/A) of the frequency divideris variablein response to variations in the strength of an 15 output signal from the digital-to-frequency converter and the variations in the frequency of the sampling clock frequencyvary the gain of the analogue-to- frequency converterthereby providing automatic gain control.
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公开(公告)号：EP2266121B1
公开(公告)日：2015-06-10
申请号：EP09730711.0
申请日：2009-04-02
申请人： NXP B.V.
发明人： LE GUILLOU, Yann , FAHS, Bassem
CPC分类号： H01F17/0006 , H01F27/346 , H01F2017/0073 , H01F2017/0086 , H03B5/1841
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公开(公告)号：EP2248257B1
公开(公告)日：2011-08-10
申请号：EP09703960.6
申请日：2009-01-20
申请人： NXP B.V.
CPC分类号： H04B1/16 , H03D3/007 , H03G3/3068 , H04B1/30
摘要： A radio receiver comprises an input (14) for a modulated radio frequency signal, a frequency down converter (16) coupled to the input, the frequency down converter including quadrature mixers (32,34) for demodulating a received modulated radio frequency signal using a local oscillator signal. An analogue-to-digital converter (54, 56) is coupled to receive demodulated signalsfrom the mixing means. The analogue-to-digital converter, which may comprise a continuous time sigma delta converter, has an input for a sampling clock frequency(f s ). A voltage controlled oscillator (38) providesthe local oscillator signaland supplies afrequency divider(60, 94) used to providethe sampling clock frequency.The dividing ratio (1/A) of the frequency divideris variablein response to variations in the strength of an 15 output signal from the digital-to-frequency converter and the variations in the frequency of the sampling clock frequencyvary the gain of the analogue-to- frequency converterthereby providing automatic gain control.
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公开(公告)号：EP2319173A1
公开(公告)日：2011-05-11
申请号：EP09787020.8
申请日：2009-08-25
申请人： NXP B.V.
发明人： LE GUILLOU, Yann
IPC分类号： H03D13/00
CPC分类号： H03D13/008 , H03L7/0812
摘要： A basic symmetric ∏/2 phase-detector receives four control signals that control a differential current at the detector's output. Each respective control signal is a linear combination of a respective pair of signals chosen from a first input signal, its logic complement, a second input signal and the logic complement of the latter. Operation is based on time-averaging the differential current, the result being zero at a phase difference of ∏/2. By means of adding one or more additional current sources to the output, controlled by one or more of the control signals, the basic operation is skewed. The time-averaged output current is now made zero only at a value of the phase difference different from ∏/2. In an embodiment with uniform current sources and resistors, the modified detector is configured for a phase difference of ∏/2
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公开(公告)号：EP2338234A1
公开(公告)日：2011-06-29
申请号：EP09744189.3
申请日：2009-10-07
申请人： NXP B.V.
IPC分类号： H04B1/10
CPC分类号： H04B1/1036
摘要： A system and method provide adaptive filtering of radio frequency (RF) signals. Multiple signals are received in a predetermined RF spectrum, the signals including a desired signal and multiple potentially interfering signals. A first signal of the potentially interfering signals is down-converted to a baseband signal, and a power of the baseband signal is determined. When the power exceeds a predetermined threshold power, a first notch filter, corresponding to a frequency of the first signal, is activated.
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公开(公告)号：EP2248261A1
公开(公告)日：2010-11-10
申请号：EP09708738.1
申请日：2009-02-03
申请人： NXP B.V.
发明人： LE GUILLOU, Yann
CPC分类号： H04N5/455 , H03L7/1976 , H03L7/23 , H04N21/4263 , H04N21/42676 , H04N21/6118
摘要： A method of operating a multi-stream reception scheme, such as DOCSIS (Data Over Cable Service Interface Specifications), comprising at least two receivers (10, 12, 14) having respective voltage controlled oscillators (16), the method including monitoring a change in local oscillator frequency in a selected one of the at least two streams and, if the frequency distance between the local oscillator frequencies is below a value likely to cause pulling or coupling between the voltage controlled oscillators of the at least two receivers, resetting the frequency planning of the selected one of the at least two streams to maximise the frequency distance of the voltage controlled oscillator of the selected stream with the voltage controlled oscillators of the or the other streams.
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公开(公告)号：EP2119024A1
公开(公告)日：2009-11-18
申请号：EP08710076.4
申请日：2008-02-18
申请人： NXP B.V.
发明人： LE GUILLOU, Yann , AUE, Volker
IPC分类号： H04B1/52
CPC分类号： H04B1/525
摘要： In a method for processing a signal received by a receiver, at a first wireless receiver (20, 62) a first signal (x(t), x1(t)) comprising first and second signal components is received. The first signal component is intended for the first wireless receiver (20, 62) and the second signal component is related to at least one of a sending signal (s(t)) generated by a transmitter (29, 69) or to a second signal (x2(t)) intended for a second wireless receiver (61). To the first wireless receiver (20, 62) a reference signal (r(t), r1(t), r2(t)) which is proportional to the sending signal (s(t)) or to the second signal (x2(t)). At the first wireless receiver (20, 62) and from the reference signal (r(t), r1(t), r2(t)) an estimation signal which estimates the second signal component is generated. A filtered signal (y(t), y1(t)) is generated by subtracting the estimation signal from the first signal (x(t), x1(t)).
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