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公开(公告)号：EP2007017A1
公开(公告)日：2008-12-24
申请号：EP08161093.3
申请日：2001-05-14
CPC分类号： H04B1/16 , H03D1/04 , H03D1/06 , H03D1/2245 , H03D3/007
摘要： A radio receiver comprising: an antenna for receiving a radio frequency signal amplitude modulated with an audio frequency signal; a digitiser for periodically sampling the radio frequency signal and generating a digital reception signal representative of the amplitude of the radio frequency signal; and a demodulator for demodulating the digital reception signal to generate a representation of the audio frequency signal.
摘要翻译： 一种无线电接收机，包括：用于接收用音频信号幅度调制的射频信号的天线; 数字转换器，用于周期性地对射频信号进行采样并产生表示射频信号振幅的数字接收信号; 以及用于解调数字接收信号以产生音频信号的表示的解调器。
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公开(公告)号：EP1935095A1
公开(公告)日：2008-06-25
申请号：EP07766264.1
申请日：2007-07-17
发明人： MACAULAY, Rob
IPC分类号： H03K5/1254
CPC分类号： H03K5/1254
摘要： A switch circuit comprising a mechanical switch having two contact elements, the switch being operable to bring the two contact elements into physical contact and thereby output an analogue switch signal representative of operation of the switch and a sigma-delta modulator arranged to receive the analogue switch signal and to output a digital switch signal in dependence thereon, the sigma-delta modulator having a frequency response such that it can suppress a relatively high frequency component of the analogue input signal and thereby effectively debounce the output of the switch.
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公开(公告)号：EP2007017A3
公开(公告)日：2011-10-05
申请号：EP08161093.3
申请日：2001-05-14
CPC分类号： H04B1/16 , H03D1/04 , H03D1/06 , H03D1/2245 , H03D3/007
摘要： A radio receiver comprising: an antenna for receiving a radio frequency signal amplitude modulated with an audio frequency signal; a digitiser for periodically sampling the radio frequency signal and generating a digital reception signal representative of the amplitude of the radio frequency signal; and a demodulator for demodulating the digital reception signal to generate a representation of the audio frequency signal.
摘要翻译： 一种无线电接收机，包括：用于接收用音频信号调幅的射频信号的天线; 数字转换器，用于周期性地采样射频信号并产生表示射频信号幅度的数字接收信号; 以及解调器，用于解调数字接收信号以产生音频信号的表示。
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公开(公告)号：EP1284047B1
公开(公告)日：2009-06-24
申请号：EP01928124.5
申请日：2001-05-14
CPC分类号： H04B1/16 , H03D1/04 , H03D1/06 , H03D1/2245 , H03D3/007
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公开(公告)号：EP2064621A2
公开(公告)日：2009-06-03
申请号：EP07804226.4
申请日：2007-09-11
摘要： A random number generator comprising a sigma-delta modulator, the sigma- delta modulator having a modulation unit comprising: a summation unit arranged to receive an analogue input signal that varies due to noise over a first voltage range, the summation unit being arranged to sum the analogue input signal with an adjustment signal to form a summation output signal; a loop filter arranged to receive the summation output signal and form a filtered output signal dependent thereon; and a quantiser arranged to receive the filtered output signal, compare the filtered output signal with a quantiser threshold and form a digital output signal by selecting between one of two predetermined voltage levels for the digital output signal in dependence on the comparison; and the sigma-delta modulator further comprising: a feedback loop arranged to receive the digital output signal and form the adjustment signal in dependence on the digital output signal such that at any given time instant the absolute difference between an amplitude of the summation output signal and the quantiser threshold is less than the first voltage range, the random number generator thereby being capable of forming a digital output signal derived from the analogue input signal and having a high degree of entropy.
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公开(公告)号：EP2012437A3
公开(公告)日：2009-01-28
申请号：EP08161084.2
申请日：2001-05-14
CPC分类号： H04B1/16 , H03D1/04 , H03D1/06 , H03D1/2245 , H03D3/007
摘要： A method for cancelling a beat frequency in a radio receiver capable of receiving a radio signal, forming a first demodulated signal (8) by mixing a signal derived from the radio signal with a first local oscillator signal (6), and forming a second demodulated signal (9) by mixing a signal derived from the radio signal with a second local oscillator signal (7) having a quadrature relationship with the first local oscillator signal, the method comprising repeatedly performing the steps of:
a. determining the modulus of the first demodulated signal;
b. determining the modulus of the second demodulated signal;
c. comparing the modulus of the first demodulated signal with the modulus of the second demodulated signal;
d. determining a quotient by dividing the greater of the moduli of the first demodulated signal and the second demodulated signal by the lesser of the moduli of the first demodulated signal and the second demodulated signal;
e. determining a cancellation factor having the value of the reciprocal of the cosine of the arctangent of the quotient; and
f. forming a beat cancelled signal by multiplying one of the first and second demodulated signals by the cancellation factor.摘要翻译： 一种用于在能够接收无线电信号的无线电接收机中消除拍频的方法，通过将从无线电信号导出的信号与第一本地振荡器信号（6）相混合形成第一解调信号（8），并且形成第二解调信号 通过将从无线电信号导出的信号与与第一本地振荡器信号具有正交关系的第二本地振荡器信号（7）进行混合来产生信号（9），所述方法包括重复执行以下步骤：a。 确定第一解调信号的模数; 湾 确定第二解调信号的模数; C。 比较第一解调信号的模数与第二解调信号的模数; d。 通过将第一解调信号和第二解调信号的模数中的较大者除以第一解调信号和第二解调信号的模数中的较小者来确定商; 即 确定具有商的反正切的余弦的倒数的值的抵消因子; 和f。 通过将第一和第二解调信号中的一个与消除因子相乘来形成拍消除信号。
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7.发明公开Method for cancelling a beat frequency in a radio receiver 有权在einemFunkempfänger的Verfahren zurUnterdrückungeinerÜberlagerungsfrequenz
公开(公告)号：EP2012437A2
公开(公告)日：2009-01-07
申请号：EP08161084.2
申请日：2001-05-14
CPC分类号： H04B1/16 , H03D1/04 , H03D1/06 , H03D1/2245 , H03D3/007
摘要： A method for cancelling a beat frequency in a radio receiver capable of receiving a radio signal, forming a first demodulated signal (8) by mixing a signal derived from the radio signal with a first local oscillator signal (6), and forming a second demodulated signal (9) by mixing a signal derived from the radio signal with a second local oscillator signal (7) having a quadrature relationship with the first local oscillator signal, the method comprising repeatedly performing the steps of:
a. determining the modulus of the first demodulated signal;
b. determining the modulus of the second demodulated signal;
c. comparing the modulus of the first demodulated signal with the modulus of the second demodulated signal;
d. determining a quotient by dividing the greater of the moduli of the first demodulated signal and the second demodulated signal by the lesser of the moduli of the first demodulated signal and the second demodulated signal;
e. determining a cancellation factor having the value of the reciprocal of the cosine of the arctangent of the quotient; and
f. forming a beat cancelled signal by multiplying one of the first and second demodulated signals by the cancellation factor.摘要翻译： 一种用于消除能够接收无线电信号的无线电接收机中的节拍频率的方法，通过将从无线电信号导出的信号与第一本地振荡器信号（6）混合形成第一解调信号（8），以及形成第二解调信号 信号（9）通过将从无线电信号导出的信号与与第一本地振荡器信号具有正交关系的第二本地振荡器信号（7）混合，所述方法包括重复执行以下步骤：a。 确定第一解调信号的模数; 湾 确定第二解调信号的模数; C。 将第一解调信号的模数与第二解调信号的模数进行比较; 天。 通过将第一解调信号和第二解调信号的模数中的较大者分别乘以第一解调信号和第二解调信号的模数中的较小者来确定商; 即 确定具有所述商的反正切余弦的倒数值的取消因子; 和f。 通过将第一和第二解调信号之一乘以消除因子来形成拍频消除信号。
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公开(公告)号：EP2012437B1
公开(公告)日：2013-09-11
申请号：EP08161084.2
申请日：2001-05-14
CPC分类号： H04B1/16 , H03D1/04 , H03D1/06 , H03D1/2245 , H03D3/007
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公开(公告)号：EP2064621B1
公开(公告)日：2011-10-26
申请号：EP07804226.4
申请日：2007-09-11
摘要： A random number generator comprising a sigma-delta modulator, the sigma- delta modulator having a modulation unit comprising: a summation unit arranged to receive an analogue input signal that varies due to noise over a first voltage range, the summation unit being arranged to sum the analogue input signal with an adjustment signal to form a summation output signal; a loop filter arranged to receive the summation output signal and form a filtered output signal dependent thereon; and a quantiser arranged to receive the filtered output signal, compare the filtered output signal with a quantiser threshold and form a digital output signal by selecting between one of two predetermined voltage levels for the digital output signal in dependence on the comparison; and the sigma-delta modulator further comprising: a feedback loop arranged to receive the digital output signal and form the adjustment signal in dependence on the digital output signal such that at any given time instant the absolute difference between an amplitude of the summation output signal and the quantiser threshold is less than the first voltage range, the random number generator thereby being capable of forming a digital output signal derived from the analogue input signal and having a high degree of entropy.
摘要翻译： 1.一种包括Σ-Δ调制器的随机数发生器，所述Σ-Δ调制器具有调制单元，所述调制单元包括：求和单元，被配置为接收由于噪声而在第一电压范围上变化的模拟输入信号，所述求和单元被设置为将 所述模拟输入信号与调节信号一起形成求和输出信号; 环路滤波器，用于接收所述求和输出信号并形成与之相关的经滤波的输出信号; 以及量化器，其布置成接收经滤波的输出信号，将经滤波的输出信号与量化器阈值进行比较，并通过依据比较在数字输出信号的两个预定电压电平中的一个之间进行选择而形成数字输出信号; 并且所述西格玛 - 德尔塔调制器还包括：反馈回路，被布置为接收所述数字输出信号并且根据所述数字输出信号形成所述调节信号，使得在任何给定的时刻，所述总和输出信号的幅度与 量化器阈值小于第一电压范围，因此随机数发生器能够形成从模拟输入信号导出并具有高熵度的数字输出信号。
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公开(公告)号：EP2007017A9
公开(公告)日：2011-09-28
申请号：EP08161093.3
申请日：2001-05-14
CPC分类号： H04B1/16 , H03D1/04 , H03D1/06 , H03D1/2245 , H03D3/007
摘要： A radio receiver comprising: an antenna for receiving a radio frequency signal amplitude modulated with an audio frequency signal; a digitiser for periodically sampling the radio frequency signal and generating a digital reception signal representative of the amplitude of the radio frequency signal; and a demodulator for demodulating the digital reception signal to generate a representation of the audio frequency signal.
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