公开(公告)号：US5757864A

公开(公告)日：1998-05-26

申请号：US516197

申请日：1995-08-17

申请人： James E. Petranovich ,  Joseph T. Lipowski

发明人： James E. Petranovich ,  Joseph T. Lipowski

IPC分类号： H04L27/14 ,  H03J3/08 ,  H03J7/04 ,  H04B1/10 ,  H04B1/16 ,  H04B1/26 ,  H04L27/06

CPC分类号： H03J3/08 ,  H03J7/04 ,  H04W52/0283 ,  Y02B60/50

摘要： The present invention relates to circuitry for a receiver having a low cost filter using automatic alignment of the center frequency of signals input to the filter to suppress noise and out-of-band signals from the filter output over a narrow bandwidth. An RF input signal to the receiver is downconverted to an IF frequency using a VCO, and the IF signal is provided to the low cost filter. The output of the filter is input to a frequency correction circuit and a distortion detection circuit. The distortion detection circuit provides an error signal including positive frequency shift errors determined from digital ones identified from the filter output signal, and negative frequency shift error signals determined from digital zeros in the filter output signal. The distortion detection circuit output is then provided through an infinite impulse response filter which integrates the distortion detection output to provide a voltage control signal to a voltage control input of the VCO and the frequency correction circuit. The VCO then automatically centers the frequency of the signal input to the low cost filter to suppress noise and out-of-band signals, and the frequency correction circuit removes error correction frequency shift provided by the VCO after downconversion. For battery powered devices, the infinite impulse response filter can maintain the state of the voltage control signal provided to the VCO upon receipt of a sleep mode signal after the sleep mode signal is disabled.

摘要翻译： 本发明涉及一种具有低成本滤波器的接收机电路，该低成本滤波器使用输入到滤波器的信号的中心频率的自动对准来在窄带宽上抑制来自滤波器输出的噪声和带外信号。 使用VCO将RF接收器的RF输入信号下变频到IF频率，并将IF信号提供给低成本滤波器。 滤波器的输出被输入到频率校正电路和失真检测电路。 失真检测电路提供包括从滤波器输出信号识别的数字确定的正频移误差的误差信号，以及滤波器输出信号中从数字零点确定的负频移误差信号。 然后通过无限脉冲响应滤波器提供失真检测电路输出，该无限脉冲响应滤波器对失真检测输出进行积分，以向VCO的电压控制输入端和频率校正电路提供电压控制信号。 VCO然后自动将信号输入的频率中心到低成本滤波器以抑制噪声和带外信号，并且频率校正电路去除下变频后由VCO提供的纠错频移。 对于电池供电的设备，无限脉冲响应滤波器可以在睡眠模式信号被禁用后接收到休眠模式信号时保持提供给VCO的电压控制信号的状态。

公开(公告)号：US5757247A

公开(公告)日：1998-05-26

申请号：US481262

申请日：1995-11-13

申请人： Eero Koukkari ,  Pekka Heikkila

发明人： Eero Koukkari ,  Pekka Heikkila

IPC分类号： H01P1/213 ,  H03H7/46 ,  H03J3/08 ,  H04B1/04 ,  H03H7/01

CPC分类号： H03J3/08

摘要： A device and a method for adjusting a bandpass filter, especially a combiner filter. The method includes deriving an RF sample signal proportional to the power of a modulated RF signal which is one of: passing forward to the bandpass filter, reflected from the input of the bandpass filter and passed through the bandpass filter; down-converting the sample signal by another RF signal; detecting the signal strength of the mixing result; adjusting the center frequency of the passband of the bandpass filter on the basis of the detected signal strength. There is an essential frequency or modulation difference between the signals to be mixed, and so the mixing result is an AC signal of a lower frequency. No accurate adjustment of the phase relation of the signals to be mixed is required. Preferably, the frequency or phase difference between the signals to be mixed is accomplished by utilizing the phase modulation contained in the transmission when one of the signals is unmodulated. The DC component is filtered off the AC signal, which eliminates the measuring problems that otherwise would be caused by the DC offset properties of the mixer.

摘要翻译： PCT No.PCT / FI93 / 00566 Sec。 371日期：1995年11月13日 102（e）日期1995年11月13日PCT 1993年12月29日PCT公布。 公开号WO94 / 16496 日期1994年7月21日一种用于调整带通滤波器的装置和方法，特别是组合器滤波器。 该方法包括导出与调制RF信号的功率成比例的RF采样信号，调制RF信号是从带通滤波器的输入反射并通过带通滤波器的带通滤波器之一; 通过另一个RF信号对采样信号进行下变频; 检测混合结果的信号强度; 基于所检测的信号强度来调整带通滤波器的通带的中心频率。 要混合的信号之间存在重要的频率或调制差异，因此混合结果是较低频率的交流信号。 不需要准确调整要混合的信号的相位关系。 优选地，要混合的信号之间的频率或相位差通过利用传输中包含的相位调制来实现，当信号中的一个未被调制时。 直流分量从交流信号滤除，消除了由混频器的直流偏移特性引起的测量问题。

公开(公告)号：US5678211A

公开(公告)日：1997-10-14

申请号：US558761

申请日：1995-11-16

申请人： David Mark Badger

发明人： David Mark Badger

IPC分类号： H03J1/00 ,  H03J3/08 ,  H03J3/32 ,  H04B1/16

CPC分类号： H03J5/0263 ,  H03J1/005 ,  H03J3/08 ,  H03J3/32

摘要： The invention concerns an arrangement including a microprocessor controller, PROM memory, and a digital to analog converter (DAC) arrangement for generating a plurality of control voltages for trimming respective ones of a plurality of varactor controlled tunable filters. The controller couples digital control signals to the respective DACs which generate respective analog control voltages which are applied to the respective tunable filters. A tuning voltage generated by a closed control loop, such as phased locked loop also under the control of the controller, is combined with the output control voltages generated by the respective DAC's in a resistance divider arrangement.

摘要翻译： 本发明涉及一种包括微处理器控制器，PROM存储器和数模转换器（DAC）装置的装置，用于产生多个控制电压，用于修整多个变容二极管控制的可调谐滤波器中的相应的一个。 控制器将数字控制信号耦合到相应的DAC，DAC产生施加到各个可调谐滤波器的各自的模拟控制电压。 在控制器的控制下，闭合控制回路产生的调谐电压（例如定相锁定环路）与由各自的DAC在电阻分配装置中产生的输出控制电压组合。

公开(公告)号：US5511012A

公开(公告)日：1996-04-23

申请号：US241839

申请日：1994-05-12

申请人： Yannick Deville

发明人： Yannick Deville

IPC分类号： H03M7/30 ,  H03J1/00 ,  H03J3/04 ,  H03J3/32 ,  H03J3/08

CPC分类号： H03J3/32 ,  H03J1/0033 ,  H03J2200/16

摘要： The relationship between the input and output of a signal transfer circuit, such as a tune circuit, a filter, a phase shifter, an amplifier, etc., is determined by the circuit response to the input signal. The value of the circuit response (R) is controlled by the value (V) of a control signal supplied thereto. According to the invention, the relationship between the latter values is approximated by a linear regression function based on a number of measured first pairs of response/control signal values and based on such regression function a transcoder determines control signal values for providing response values of the circuit in accordance with second pairs of response/control signal values.

摘要翻译： 诸如调谐电路，滤波器，移相器，放大器等的信号传送电路的输入和输出之间的关系由对输入信号的电路响应确定。 电路响应（R）的值由提供给其的控制信号的值（V）控制。 根据本发明，通过基于测量的第一对响应/控制信号值的数量的线性回归函数来近似后一值的关系，并且基于这种回归函数，代码转换器确定用于提供响应/控制信号值的响应值的控制信号值 电路根据第二对响应/控制信号值。

公开(公告)号：US4417215A

公开(公告)日：1983-11-22

申请号：US301077

申请日：1981-09-10

申请人： Leonard L. Kleinberg

发明人： Leonard L. Kleinberg

IPC分类号： H03B5/20 ,  H03G5/14 ,  H03H11/12 ,  H03J3/08 ,  H03F1/34

CPC分类号： H03B5/20 ,  H03G5/14 ,  H03H11/1217 ,  H03J3/08

摘要： A non-inverting, direct current amplifier stage is cascaded into an integrator stage to form a two stage tuned network (10) having a single input junction common to both stages. The network provides independent adjustment of center frequency, bandwidth and voltage gain. The insertion of a positive feedback loop between the stages provides a very narrow bandwidth network (10'). The addition of back-to-back zener diodes between the common input node and ground converts the network into an oscillator (10").

摘要翻译： 非反相直流放大器级级联到积分器级中以形成具有两级共同的单个输入结的两级调谐网络（10）。 网络提供中心频率，带宽和电压增益的独立调整。 在级之间插入正反馈回路提供非常窄的带宽网络（10'）。 在公共输入节点和地之间添加背对背齐纳二极管将网络转换成振荡器（10“）。

公开(公告)号：US4254390A

公开(公告)日：1981-03-03

申请号：US15602

申请日：1979-02-27

申请人： Mitsuo Saito ,  Mitsuo Makimoto ,  Sadahiko Yamashita

发明人： Mitsuo Saito ,  Mitsuo Makimoto ,  Sadahiko Yamashita

IPC分类号： H01P1/203 ,  H01P1/20 ,  H01P7/08 ,  H03J3/08 ,  H03J3/18

CPC分类号： H01P7/082 ,  H01P1/20 ,  H03J3/185

摘要： A tuning device including a conductive housing in which are suspended a dielectric substrate. A pair of first and second resonant circuits is disposed on the substrate in parallel with each other. Each resonant circuit is formed by an elongated conductive film and a capacitive element. A grounded conductive strip film is provided between the transmission lines of the first and second resonant circuits to reduce the interstage coupling between the two transmission lines with a resultant decrease in spacing between them.

摘要翻译： 一种调谐装置，包括导电壳体，悬置电介质基片。 一对第一和第二谐振电路彼此平行地设置在基板上。 每个谐振电路由细长的导电膜和电容元件形成。 在第一和第二谐振电路的传输线之间设置接地导电条膜，以减少两条传输线之间的级间耦合，从而减小它们之间的间距。

公开(公告)号：US2267047A

公开(公告)日：1941-12-23

申请号：US31967440

申请日：1940-02-19

申请人： JOHNSON LAB INC

发明人： SCHAPER WILLIAM A

IPC分类号： H03H2/00 ,  H03J3/08

CPC分类号： H03J3/08 ,  H03H2/008

公开(公告)号：US2124211A

公开(公告)日：1938-07-19

申请号：US74861034

申请日：1934-10-17

申请人： RCA CORP

发明人： ROBERTS WALTER VAN B

IPC分类号： H03J3/08

CPC分类号： H03J3/08

公开(公告)号：US1843177A

公开(公告)日：1932-02-02

申请号：US8112926

申请日：1926-01-13

申请人： SONNEBORN SOL S ,  RICHTER HENRY G

发明人： SONNEBORN SOL S ,  RICHTER HENRY G

IPC分类号： H03J3/08 ,  H04B1/16

CPC分类号： H03J3/08 ,  H04B1/163

公开(公告)号：US11342903B2

公开(公告)日：2022-05-24

申请号：US17247331

申请日：2020-12-07

申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

发明人： Nicolas Goux ,  Franck Badets

IPC分类号： H03J3/08 ,  H03D3/00 ,  H03L7/24 ,  H03H11/04

摘要： A bandpass filter configured to receive a temporally modulated periodic input signal Vin(t), and to deliver an output signal Vout(t), and includes, in combination: a phase comparator configured to receive, on a first input, the temporally modulated periodic input signal Vin(t) as first signal, and to generate an output signal with a variable duty cycle; coupled to an injection-locked oscillator configured to receive as input, the output signal from the phase comparator, and to generate a signal Vr(t) that is phase-offset with respect to the output signal from the phase comparator; the phase-offset signal being applied to a second input of the phase comparator as second input signal; and the output signal from the phase comparator being the output signal Vout(t) from the bandpass filter and being representative of the phase difference between the two input signals Vin(t) and Vr(t).