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1.发明授权Voltage-controlled oscillator using a phase control loop for establishing an accurate idling frequency and temperature stabilized control sensitivity 失效使用相位控制回路的压控振荡器，用于建立精确的空载频率和温度稳定的控制灵敏度
公开(公告)号：US4916412A
公开(公告)日：1990-04-10
申请号：US299667
申请日：1989-01-19
摘要： Voltage-controlled oscillator provided with a frequency-determining element and an oscillator loop having a phase-rotating network, in which the value of one or more elements depends on a control signal which is fed to a control input and with which the phase rotation and thereby the oscillator frequency can be changed. The oscillator is further provided with a phase control loop, at least comprising a phase-rotating network to the input of which the oscillator signal is fed, a phase detector to the two inputs of which the input signal and the output signal of said phase-rotating network are fed, and an amplifier which amplifies the output signal of the phase detector and feeds it to the control input of the phase-rotating network of the oscillator loop. The phase detector has an accurately known and temperature-independent input-output relation. The phase-rotating network of the phase control loop may be formed by the phase-rotating network of the oscillator loop (FIG. 2). Said oscillator loop may have at least two cascaded phase-rotating subnetworks, at least one of which has said phase control loop with phase detector and amplifier (FIGS. 3, 4, 5).
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公开(公告)号：US20100019853A1
公开(公告)日：2010-01-28
申请号：US12282240
申请日：2007-03-08
申请人： Hendrikus C. Nauta
发明人： Hendrikus C. Nauta
IPC分类号： H03F3/68
CPC分类号： H03F3/45596 , H03F3/45085 , H03F3/48 , H03F2203/45652
摘要： There is provided an amplifier that comprises a plurality of amplifier stages arranged in a cascade; and a frequency-dependent load associated with the output of at least one of the plurality of amplifier stages, the frequency dependent load being adapted to reduce a voltage or current offset in the output of said at least one amplifier stage.
摘要翻译： 提供了一种放大器，其包括以级联方式布置的多个放大器级; 以及与所述多个放大器级中的至少一个放大器级的输出相关联的频率相关负载，所述频率相关负载适于减小所述至少一个放大器级的输出中的电压或电流偏移。
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公开(公告)号：US08150355B2
公开(公告)日：2012-04-03
申请号：US12282459
申请日：2007-03-08
申请人： Hendrikus C. Nauta
发明人： Hendrikus C. Nauta
IPC分类号： H04B1/18
CPC分类号： H03H11/1213 , H03H11/1291 , H03H2011/0494 , H03L7/087
摘要： There is provided a method that comprises identifying a parasitic signal transfer in a filter using a signal-directed graph; and adding compensation paths to the filter to reduce or eliminate the effect of the parasitic signal transfer A corresponding filter is provided which comprises a plurality of amplifier stages that generate one or more filter poles; at least one component coupled to at least one of the amplifier stages, the component causing a parasitic effect in the filter; and means for applying a compensation current to the at least one amplifier stage to reduce or eliminate the parasitic effect. A radio receiver is further provided that comprises a filter for receiving and filtering in-phase and quadrature signals; an amplifier for receiving and amplifying one of said filtered in-phase and quadrature signals; means for receiving the amplified and filtered in-phase or quadrature signal from said amplifier, and for regenerating the other one of said in-phase and quadrature signals from said amplified and filtered signal.
摘要翻译： 提供了一种方法，其包括使用信号指向图来识别滤波器中的寄生信号传输; 并且向滤波器添加补偿路径以减少或消除寄生信号传输的影响。提供相应的滤波器，其包括产生一个或多个滤波极的多个放大器级; 至少一个组件耦合到所述放大器级中的至少一个，所述组件在所述滤波器中引起寄生效应; 以及用于将补偿电流施加到所述至少一个放大器级以减少或消除所述寄生效应的装置。 还提供一种无线电接收机，其包括用于接收和滤波同相和正交信号的滤波器; 放大器，用于接收和放大所述滤波的同相和正交信号之一; 用于从所述放大器接收经放大和滤波的同相或正交信号并用于从所述经放大和滤波的信号再生所述同相和正交信号中的另一个的装置。
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4.发明授权Inductive proximity sensor for detecting an object starting electrical conductivity 失效用于检测物体启动电导率的感应近似传感器
公开(公告)号：US5065093A
公开(公告)日：1991-11-12
申请号：US235103
申请日：1988-08-23
CPC分类号： G01V3/102
摘要： Inductive proximity sensor for detecting an object having electrical conductivity comprising a sensor housing, a measuring coil and reference coil placed on either side of a plane of symmetry through the sensor housing. Each coil is partly surrounded by a piece of magnetic material which leaves the measuring coil or reference coil respectively free at the front which faces the direction of the object to be detected or a reference member. An electronic circuit is provided for supplying both coils with an AC signal and for measuring the change in a specific property of the measuring coil with respect to that of the reference coil when object approaches and determining therefrom the distance or the presence of the object. The pieces of magnetic material around the two coils are formed essentially from the same homogeneous material forming a block. Means are provided in the sensor housing for screening magnetic fields produced by both coils in order to suppress thereby mutual crosstalk. The electronic circuit for each coil has a separate synchronous detector with its own oscillator for effecting a frequency-selective measurement such that the effect of changes in the properties of the magnetic material and of the measuring coil on the detection distance is compensated for electronically. Both oscillators of the synchronous detectors have a frequency offset from each other.
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5.发明授权Voltage controlled oscillator with a resonant network and a reactive network, having a control loop between the networks 失效具有谐波网络的电压控制振荡器和具有网络之间的控制环路的反应网络
公开(公告)号：US5126697A
公开(公告)日：1992-06-30
申请号：US616400
申请日：1990-11-21
CPC分类号： H03B5/368 , H03B5/1209 , H03B5/1231 , H03B5/1271 , H03B2200/0036 , H03B2200/004 , H03B2201/0208
摘要： Voltage controlled oscillator provided with a resonant network, an amplifier and a reactive network, all incorporated in an oscillator loop, the reactive network having one or more reactive components whose values depend on a control signal fed to a control input, so that the oscillator frequency can be regulated with said control signal. A control loop is provided between the resonant network and the reactive network, with which control loop the difference is determined between a measure of the imaginary part of the impedance or admittance of the resonant network and the control signal acting as reference quantity. The imaginary part of the impedance or admittance of the reactive network is regulated with said difference. The control loop contains a derivation circuit for deriving said measure and a differential amplifier, to one input of which the output signal of the derivation circuit is fed and to the other input of which the control signal is fed.
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公开(公告)号：US4742566A
公开(公告)日：1988-05-03
申请号：US838224
申请日：1986-03-10
CPC分类号： H03L7/0805 , H03D1/2281 , H03L7/23 , H04B1/30
摘要： AM receiver comprising a tuning oscillator (T0), a first phase detector (PD1) and a first loop filter (LP1) successively arranged in a first phase control loop. The tuning oscillator (T0) is synchronized with a reference oscillator (VCX0) coupled to the first phase detector (PD1) and applies a mixing frequency to a mixer stage (M) for conversion of a received AM signal into an IF-AM signal. The mixer stage (M) is coupled to an AM demodulator (SD) for demodulation of the base-band modulation signal. The reference oscillator (VCX0) is controllable and is disposed between a second loop filter (LP2) and a second phase detector (PD2) of a second phase control loop coupled to the mixer stage (M) for applying a local detection carrier synchronized with the IF-AM signal carrier to the AM demodulator (SD). The second loop filter (LP2) applies a control signal to the reference oscillator (VCX0) and is connected through a coupling circuit (C) to a control input of the tuning oscillator (T0) for a negative feedback of the control signal of the reference oscillator (VCX0) to the tuning oscillator (T0).
摘要翻译： AM接收机，包括连续布置在第一相控制回路中的调谐振荡器（T0），第一相位检测器（PD1）和第一环路滤波器（LP1）。 调谐振荡器（T0）与耦合到第一相位检测器（PD1）的参考振荡器（VCX0）同步，并将混频器施加到混频器级（M），用于将接收到的AM信号转换成IF-AM信号。 混频器级（M）耦合到AM解调器（SD），用于解调基带调制信号。 参考振荡器（VCX0）是可控的并且被布置在耦合到混频器级（M）的第二相位控制环路的第二环路滤波器（LP2）和第二相位检测器（PD2）之间，用于施加与 IF-AM信号载波到AM解调器（SD）。 第二环路滤波器（LP2）将控制信号施加到参考振荡器（VCX0），并通过耦合电路（C）连接到调谐振荡器（T0）的控制输入端，用于参考的控制信号的负反馈 振荡器（VCX0）到调谐振荡器（T0）。
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公开(公告)号：US4607234A
公开(公告)日：1986-08-19
申请号：US700232
申请日：1985-02-11
CPC分类号： H03G3/3068
摘要： Gain-controlled amplifier arrangement with a cascade arrangement of first and second gain-controlled amplifier stages, an AM-detection circuit and an integrating arrangement for generating a control voltage for the two stages and a threshold circuit for generating first and second threshold voltages, for delaying at an increasing input level the start of the control of the first stage (1-8) relative to that of the second stage (19-28). So as to prevent the gain control of the first stage from starting, for example because of an unwanted variation of the threshold voltages, before the gain control of the second stage has ended, the control ranges of the two stages are separated from each other by a separation area in which no gain control is effected. In order to prevent an unwanted deviation of the output level in that separation area the control voltage is generated by integration of a current in a capacitor (37), which current varies with the input level, so that this control does not only depend on the actual input level but also on the duration of occurrence of this input level.
摘要翻译： 具有第一和第二增益控制放大器级的级联布置的增益控制放大器布置，AM检测电路和用于产生两级的控制电压的积分装置和用于产生第一和第二阈值电压的阈值电路，用于 在第一级（1-8）相对于第二级（19-28）的控制开始时，在增加的输入电平下延迟。 为了防止第一级的增益控制开始，例如由于阈值电压的不期望的变化，在第二级的增益控制结束之前，两级的控制范围通过 其中不进行增益控制的分离区域。 为了防止在该分离区域中的输出电平的不期望的偏差，通过将电流积分到电容器（37）中来产生控制电压，该电流随输入电平而变化，使得该控制不仅取决于 实际输入电平，也是该输入电平发生的持续时间。
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公开(公告)号：US20090033424A1
公开(公告)日：2009-02-05
申请号：US12282459
申请日：2007-03-08
申请人： Hendrikus C. Nauta
发明人： Hendrikus C. Nauta
CPC分类号： H03H11/1213 , H03H11/1291 , H03H2011/0494 , H03L7/087
摘要： There is provided a method that comprises identifying a parasitic signal transfer in a filter using a signal-directed graph; and adding compensation paths to the filter to reduce or eliminate the effect of the parasitic signal transfer A corresponding filter is provided which comprises a plurality of amplifier stages that generate one or more filter poles; at least one component coupled to at least one of the amplifier stages, the component causing a parasitic effect in the filter; and means for applying a compensation current to the at least one amplifier stage to reduce or eliminate the parasitic effect. A radio receiver is further provided that comprises a filter for receiving and filtering in-phase and quadrature signals; an amplifier for receiving and amplifying one of said filtered in-phase and quadrature signals; means for receiving the amplified and filtered in-phase or quadrature signal from said amplifier, and for regenerating the other one of said in-phase and quadrature signals from said amplified and filtered signal.
摘要翻译： 提供了一种方法，其包括使用信号指向图来识别滤波器中的寄生信号传输; 并且向滤波器添加补偿路径以减少或消除寄生信号传输的影响。提供相应的滤波器，其包括产生一个或多个滤波极的多个放大器级; 至少一个组件耦合到所述放大器级中的至少一个，所述组件在所述滤波器中引起寄生效应; 以及用于将补偿电流施加到所述至少一个放大器级以减少或消除所述寄生效应的装置。 还提供一种无线电接收机，其包括用于接收和滤波同相和正交信号的滤波器; 放大器，用于接收和放大所述滤波的同相和正交信号之一; 用于从所述放大器接收经放大和滤波的同相或正交信号并用于从所述经放大和滤波的信号再生所述同相和正交信号中的另一个的装置。
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