公开(公告)号：US5923221A

公开(公告)日：1999-07-13

申请号：US815560

申请日：1997-03-12

申请人： Pierre Dobrovolny

发明人： Pierre Dobrovolny

IPC分类号： H03B1/00 ,  H03B1/04 ,  H03B5/12 ,  H03B5/18

CPC分类号： H03B5/1847 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/1243 ,  H03B2200/0088 ,  H03B2201/0208 ,  H03B2202/04 ,  H03B2202/084

摘要： An oscillator operable in the gigaHertz range includes a transistor having an emitter coupled to a tank circuit and an additional feedback path coupling the tank circuit back to the base of the transistor. The inductive elements of the tank circuit are in printed foil form as is a transmission line that provides the additional feedback path. This arrangement improves the phase noise characteristics of the oscillator while extending its operating frequency range.

摘要翻译： 在千兆赫兹范围内可操作的振荡器包括具有耦合到储能电路的发射极和将该储能电路耦合回该晶体管的基极的附加反馈路径的晶体管。 储罐回路的电感元件是印刷箔形式，也就是提供附加反馈路径的传输线。 这种布置在延长其工作频率范围的同时改善了振荡器的相位噪声特性。

公开(公告)号：US4461041A

公开(公告)日：1984-07-17

申请号：US455688

申请日：1983-01-05

申请人： Pierre Dobrovolny

发明人： Pierre Dobrovolny

IPC分类号： H04B1/26

CPC分类号： H04B1/26

摘要： The front end of a microwave receiver includes a waveguide with one wall comprised partially of the conductive ground plane of a printed circuit board. On the opposite side of the circuit board is mounted receiver front end circuitry including packaged, discrete devices and integrated circuits. An RF probe is inserted through the circuit board and into the waveguide for picking up a signal incident thereon and providing it to the aforementioned receiver front end circuitry. Incorporated in the waveguide is a cavity also partially formed from the ground plane of the receiver circuit board and containing a dielectric resonator element which, in combination with an oscillator located on the circuit board, provides a reference frequency for mixing with the received signal in generating an IF signal which is then provided to IF signal processing circuitry. The integrated RF receiver/waveguide is compact, incorporates readily available components in an inexpensively manufactured structure, and is particularly adapted for the front end of an SHF receiver such as utilized to receive satellite television signals.

摘要翻译： 微波接收器的前端包括波导，其一个壁部分地由印刷电路板的导电接地平面组成。 在电路板的另一面是安装接收机前端电路，包括封装，分立器件和集成电路。 将RF探针插入电路板并插入波导中以拾取入射到其上的信号并将其提供给前述的接收器前端电路。 结合在波导管中的是由接收器电路板的接地平面部分地形成并且包含介质谐振元件的腔，该介质谐振元件与位于电路板上的振荡器组合提供用于与产生的接收信号混合的参考频率 然后将IF信号提供给IF信号处理电路。 集成RF接收器/波导是紧凑的，以廉价制造的结构组合易于获得的部件，并且特别适用于诸如用于接收卫星电视信号的SHF接收器的前端。

公开(公告)号：US4435841A

公开(公告)日：1984-03-06

申请号：US353694

申请日：1982-03-01

申请人： Pierre Dobrovolny

发明人： Pierre Dobrovolny

IPC分类号： H03H7/01 ,  H04B1/26 ,  H03H7/00

CPC分类号： H04B1/26 ,  H03H7/01 ,  H03H7/1758

摘要： A multichannel communications receiver, e.g. a CATV converter, includes a switched filter for reducing third order intermodulation distortion by limiting the number of channels processed by the receiver. In a preferred embodiment, the filter is switchable between a highpass and a lowpass configuration by a control signal supplied to two switching diodes. The input and output of the filter are coupled by a mutual inductance which partially compensates for the effect of parasitic inductance at higher frequencies.

摘要翻译： 多通道通信接收机，例如 CATV转换器包括用于通过限制由接收机处理的信道数量来减少三阶互调失真的开关滤波器。 在优选实施例中，通过提供给两个开关二极管的控制信号，滤波器可在高通和低通配置之间切换。 滤波器的输入和输出通过互感耦合，该互感部分地补偿较高频率下的寄生电感的影响。

公开(公告)号：US6150993A

公开(公告)日：2000-11-21

申请号：US276065

申请日：1999-03-25

申请人： Pierre Dobrovolny

发明人： Pierre Dobrovolny

IPC分类号： H01Q1/00 ,  H01Q21/24 ,  H01Q21/29 ,  H01Q25/00 ,  H01Q21/00

CPC分类号： H01Q25/005 ,  H01Q1/007 ,  H01Q21/24 ,  H01Q21/29

摘要： An indoor antenna for a UHF and higher frequency receiver has a plurality of polygon shaped conductive elements spaced apart from each other in a three dimensional arrangement. The signals from each pair of elements are combined through adjustable phase and attenuation networks and the combined signal is supplied to the input of a receiver that includes evaluation circuitry for optimizing the response of the antenna system when subjected to multipath conditions. A plurality of sets of random adjustment values are initially applied to the phase and attenuation networks and the antenna response over the signal band is monitored. The set of random values that exhibits the least deviation from the optimum antenna response over the received frequency band is used as the starting point for an optimization program for the calculation of further adjustments to the individual phase and attenuation networks to optimize the antenna response over the received signal band.

摘要翻译： 用于UHF和更高频率接收机的室内天线具有在三维布置中彼此间隔开的多个多边形形状的导电元件。 来自每对元件的信号通过可调相位和衰减网络组合，并且将组合信号提供给接收机的输入端，该接收机包括评估电路，用于在经受多径条件时优化天线系统的响应。 最初将多组随机调整值应用于相位和衰减网络，并监视信号频带上的天线响应。 在接收频带上表现出与最佳天线响应最小偏差的随机值集合被用作优化程序的起始点，用于计算对各个相位和衰减网络的进一步调整以优化天线响应的优化程序 接收信号频带。

公开(公告)号：US6035185A

公开(公告)日：2000-03-07

申请号：US889672

申请日：1997-07-08

申请人： Pierre Dobrovolny ,  James J. Wolford

发明人： Pierre Dobrovolny ,  James J. Wolford

IPC分类号： H04N5/44 ,  H03D7/16 ,  H03H7/12 ,  H03J5/24 ,  H03J7/00 ,  H04B1/18 ,  H04B1/06

CPC分类号： H03H7/12 ,  H03J5/244 ,  H04B1/18 ,  H03D7/161

摘要： A selective RF circuit for a double conversion tuner includes three double tuned bandpass circuits, each of which is tunable over approximately one-third of the tuning range. Switching diodes are used at the input and the output of each of the bandpass sections for selectively activating one of the bandpass sections and deactivating the remaining ones in response to a bandswitching signal. Operational amplifiers or other devices supply the input and output switching diodes by providing a current sink for the active bandpass and current sources for the inactive bandpasses.

摘要翻译： 用于双转换调谐器的选择性RF电路包括三个双调谐带通电路，其中的每一个可调谐大约在调谐范围的三分之一。 在每个带通部分的输入和输出处使用开关二极管，用于选择性地激活带通部分中的一个，并响应于频带切换信号去激活剩余的带通部分。 运算放大器或其他器件通过为无源带通的有源带通和电流源提供电流吸收器来为输入和输出开关二极管提供电源。

公开(公告)号：US5834988A

公开(公告)日：1998-11-10

申请号：US815559

申请日：1997-03-12

申请人： Pierre Dobrovolny

发明人： Pierre Dobrovolny

IPC分类号： H03G5/00 ,  H03F3/195 ,  H03G1/00 ,  H03H7/25 ,  H04N5/44 ,  H04N5/52 ,  H03H7/24

CPC分类号： H03F3/195 ,  H03G1/0058 ,  H03H7/255 ,  H04N5/4446 ,  H04N5/52

摘要： An attenuator for signals in the frequency band of 50 to 800 MHz is subject to a range of AGC signal attenuating potentials. The attenuator includes a first attenuating PIN diode connected in series between an input and an output. The opposite ends of the first PIN diode are AC coupled via second and third impedance matching PIN diodes to an AC ground. The first PIN diode exhibits a frequency dependent slope over the wide signal frequency band and the range of AGC potentials. First and second inductors, in the form of metallic foil strips, are connected between the second and third PIN diodes and the AC ground. The foil strips are positioned in close proximity to each other and arranged such that signal currents flow therein in opposite directions to establish a negative mutual coupling coefficient for compensating for the frequency dependent slope of the first PIN diode.

摘要翻译： 用于50MHz至800MHz频带信号的衰减器受AGC范围的AGC信号衰减电位的影响。 衰减器包括串联连接在输入和输出之间的第一衰减PIN二极管。 第一PIN二极管的相对端通过第二和第三阻抗匹配PIN二极管交流耦合到AC地。 第一个PIN二极管在宽信号频带和AGC电位范围内呈现频率相关斜率。 以金属箔片形式的第一和第二电感器连接在第二和第三PIN二极管和AC地之间。 箔条彼此靠近并且布置成使得信号电流在相反的方向上流动，以建立用于补偿第一PIN二极管的频率相关斜率的负互耦系数。

公开(公告)号：US5420646A

公开(公告)日：1995-05-30

申请号：US815721

申请日：1991-12-30

申请人： Pierre Dobrovolny

发明人： Pierre Dobrovolny

IPC分类号： H03D7/16 ,  H03J5/24 ,  H04N5/50

CPC分类号： H03J5/244 ,  H03D7/161 ,  H04N5/50

摘要： A double conversion type television tuning system for a digital television signal includes a synthesizer for developing a tuning voltage for the upconverter. The synthesizer provides bandswitching for dividing the tuning range into four portions and includes a separate local oscillator for each portion. Each local oscillator is enabled by a transistor that is switched by a bandswitch voltage. The output of each oscillator is applied through respective bandswitched buffer amplifiers to an arrangement of three 3 dB hybrid couplers to convey the appropriate local oscillator signal to the upconverter mixer. The system minimizes phase noise and jitter which is essential when operating with digital signals.

摘要翻译： 用于数字电视信号的双转换型电视调谐系统包括用于开发用于上变频器的调谐电压的合成器。 合成器提供用于将调谐范围分成四个部分的频带切换，并且包括用于每个部分的单独的本地振荡器。 每个本地振荡器都由一个由频带开关电压切换的晶体管使能。 每个振荡器的输出通过相应的频带切换缓冲放大器施加到三个3 dB混合耦合器的布置，以将适当的本地振荡器信号传送到上变频器混频器。 该系统将相位噪声和抖动最小化，这在使用数字信号进行操作时非常重要。

公开(公告)号：US5270824A

公开(公告)日：1993-12-14

申请号：US815711

申请日：1991-12-30

申请人： Pierre Dobrovolny

发明人： Pierre Dobrovolny

IPC分类号： H03D7/16 ,  H04N5/44 ,  H04N5/52 ,  H04N5/50

CPC分类号： H04N5/4401 ,  H03D7/16 ,  H03G3/3057 ,  H04N5/52

摘要： An AGC system for a double conversion type tuner for tuning digital television signals includes a quadrature coupler that has two of its four ports each terminated by a pin diode. The pin diodes are driven conductive in response to an AGC voltage and control the power transfer from the first mixer to the first IF amplifier. A series resistor is connected in circuit with each pin diode for providing a 50 ohm impedance when its associated pin diode is driven fully conductive. The pin diodes are conductively balanced to maintain impedance matching between the first mixer and the first IF amplifier.

摘要翻译： 用于调谐数字电视信号的双转换型调谐器的AGC系统包括正交耦合器，其四个端口中的两个端口各自由引脚二极管端接。 引脚二极管响应于AGC电压被驱动导电并且控制从第一混频器到第一IF放大器的功率传输。 串联电阻器与每个引脚二极管连接，用于在其相关的引脚二极管驱动完全导通时提供50欧姆阻抗。 引脚二极管导电平衡，以保持第一混频器和第一IF放大器之间的阻抗匹配。

公开(公告)号：US4823400A

公开(公告)日：1989-04-18

申请号：US96683

申请日：1987-09-15

申请人： Pierre Dobrovolny

发明人： Pierre Dobrovolny

IPC分类号： H03D9/06 ,  H04B1/26

CPC分类号： H03D9/0625

摘要： An RF mixer combines electrical and structural aspects to create a more efficient device. Diodes are coaxially mounted within two conductive tubes which form shields. The respective diode or diodes associated with each of the tubes are cross-connected at the LO port to the tube associated with the other diode or diodes. A capacitor compensates the inductance associated with the outer surfaces of the tubes. At their other ends, the tubes are coupled to ground and the diodes are coupled to an RF/IF bandsplitting network.

摘要翻译： RF混频器结合电气和结构方面来创建更有效的设备。 二极管同轴安装在形成屏蔽的两个导电管内。 与每个管相关联的相应二极管或二极管在LO端口处与与另一个二极管或二极管相关联的管交叉连接。 电容器补偿与管的外表面相关联的电感。 在其另一端，管耦合到地，并且二极管耦合到RF / IF频带分割网络。

公开(公告)号：US4523159A

公开(公告)日：1985-06-11

申请号：US566237

申请日：1983-12-28

申请人： Pierre Dobrovolny

发明人： Pierre Dobrovolny

IPC分类号： H03B5/18 ,  H03D9/06 ,  H04B1/28

CPC分类号： H03D9/0675 ,  H03B5/1852 ,  H03B5/1876 ,  H03D2200/009 ,  H03D9/0633

摘要： A microwave oscillator and a combination microwave oscillator/single balanced mixer for a satellite television receiver includes a cylindrical dielectric resonator located on one side of a ground plane formed by a conductive foil on a substrate with microstrip transmission lines formed by foil patterns on the opposite side of said substrate. A gallium arsenide FET is disposed in a hole through said substrate with its source electrode connected to the ground plane and its drain and gate electrodes coupled to first and second transmission line strips, portions of which are following the contours of said dielectric resonator. Two sets of coupling slots are formed in the ground plane for permitting magnetic coupling between the dielectric resonator and the opposite transmission line strips. In one embodiment an additional coupling slot in the ground plane couples the dielectric resonator to an output transmission line strip. In another embodiment a dual diode package is disposed in a square hole in the substrate and ground plane with the common junction of the two diodes being coupled to a third transmission line strip and the opposite ends of the series connected diodes coupled to the ground plane. Coupled magnetic energy from the resonator creates a potential difference across the ground plane at the opposite sides of the square hole thus generating a local oscillator signal across the series connected diodes. The third transmission line strip serves as a coupling for both an RF signal input to and an IF signal output from, the mixer.

摘要翻译： 用于卫星电视接收机的微波振荡器和组合微波振荡器/单平衡混频器包括位于由基板上的导电箔形成的接地平面的一侧上的圆柱形介质谐振器，其中微带传输线由相对侧上的箔片形成 的所述衬底。 砷化镓FET设置在穿过所述衬底的孔中，其源电极连接到接地平面，其漏极和栅电极耦合到第一和第二传输线条，其一部分遵循所述介质谐振器的轮廓。 在接地平面中形成两组耦合槽，用于允许介质谐振器和相对的传输线条之间的磁耦合。 在一个实施例中，接地平面中的附加耦合槽将介质谐振器耦合到输出传输线条。 在另一个实施例中，双二极管封装设置在衬底和接地平面中的方孔中，其中两个二极管的公共接头耦合到第三传输线条，并且串联连接的二极管的相对端耦合到接地平面。 来自谐振器的耦合磁能在方孔的相对侧在地平面上产生电位差，从而在串联连接的二极管上产生本地振荡器信号。 第三传输线条作为从混频器输出的RF信号和从其输出的IF信号的耦合。