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公开(公告)号：US3649927A
公开(公告)日：1972-03-14
申请号：US3649927D
申请日：1970-02-27
Applicant: BELL TELEPHONE LABOR INC
Inventor： SEIDEL HAROLD
CPC classification number: H03F1/3229
Abstract: The parameters of a feed-forward compensated amplifier are redefined such that the error correcting signal and the uncorrected signal combine in phase at maximum output power. It is then shown that for this condition a directional coupler can be used as the error injection network with minimal loss of error signal power or main signal power. This results in the most efficient use of both the main signal amplifier and the error signal amplifier and, in addition, produces an impedance match in the main signal wavepath, in the error signal wavepath and at the output terminal of the overall amplifier.
Abstract translation: 重新定义前馈补偿放大器的参数，使得纠错信号和未校正的信号以最大输出功率相位组合。 然后表明，对于这种情况，定向耦合器可以用作误差信号功率或主信号功率损失最小的误差注入网络。 这导致了主要信号放大器和误差信号放大器的最有效的使用，并且在主信号波导路径，误差信号波形路径和整个放大器的输出端产生阻抗匹配。
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公开(公告)号：US3637292A
公开(公告)日：1972-01-25
申请号：US3637292D
申请日：1969-07-25
Applicant: BELL TELEPHONE LABOR INC
Inventor： SEIDEL HAROLD
CPC classification number: G02F1/11
Abstract: A display is formed by directing an optical beam onto an acousto-optical medium having a single small region of substantial strain which is caused to traverse the medium controllably.
Abstract translation: 通过将光束引导到具有可控制地穿过介质的基本应变的单个小区域的声光介质上来形成显示器。
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公开(公告)号：US3624532A
公开(公告)日：1971-11-30
申请号：US3624532D
申请日：1970-03-23
Applicant: BELL TELEPHONE LABOR INC
Inventor： SEIDEL HAROLD
CPC classification number: H03F1/3229 , H03F1/345 , H03F2200/372
Abstract: This application describes a feedback amplifier which utilizes the input signal at least twice. In the first instance, the input signal is applied to the main amplifier and experiences the full gain of the amplifier. Secondly, the input signal is used as a reference against which the amplified output signal is compared. Any difference between the reference signal and the output signal due to noise and/or distortion is identified as an error signal which is amplified in a separate error amplifier, and then injected into the input terminal of the main amplifier in phase to degenerate the error. Because the feedback only degenerates the error signal, and not the useful signal, a reentrant signal feedback amplifier is capable of operating over a greater stabilized bandwidth than conventional feedback amplifiers. In addition, an overall improvement in the signal-to-noise ratio can be realized.
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公开(公告)号：US3605044A
公开(公告)日：1971-09-14
申请号：US3605044D
申请日：1968-11-18
Applicant: BELL TELEPHONE LABOR INC
Inventor： SEIDEL HAROLD
CPC classification number: H03H7/075 , H03H7/0115
Abstract: A variety of filter structures are synthesized by means of a cascade of bimodal networks. By including mode converters between adjacent pairs of networks, successive networks can be made to respond to one or the other of said modes. A transmission line filter and a coupler (channel dropping) filter are described.
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公开(公告)号：US3603899A
公开(公告)日：1971-09-07
申请号：US3603899D
申请日：1969-04-18
Applicant: BELL TELEPHONE LABOR INC
Inventor： GYORGY ERNST M , JAEGER RAYMOND E , SEIDEL HAROLD
CPC classification number: H01P1/2084 , H01P1/207 , H01P7/06
Abstract: A low loss microwave transmission structure composed of a section of waveguide within which is concentrically placed an array (one or more) of cylindrical sections of dielectric material with relative dielectric constant greater than four, spaced away from the walls by a significant fraction of the radius (at least of the order of 10 percent) and possessing appreciable discontinuities. In the dielectric loaded sections electromagnetic radiation is propagated primarily within the dielectric so that the losses observed are mainly a function of the dielectric material and are, to first order, insensitive to the wall composition or condition. In this most general form the structure can by synthesized as a low loss filter or equalizer. When operated at frequencies at which the unloaded waveguide is below cutoff a high-Q cavity can be formed. A single section cavity of this type has been used to measure the Q of the low loss high dielectric constant dielectrics. A particularly simple and easily adjustable coaxial input and output structure is available which couples strongly to the cylindrically symmetric TM01 mode, all other propagating modes being greatly disfavored.
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Patent Agency Ranking
公开(公告)号：US3560882A
公开(公告)日：1971-02-02
申请号：US3560882D
申请日：1969-08-25
Applicant: BELL TELEPHONE LABOR INC
Inventor： BEURRIER HENRY R , SEIDEL HAROLD
Abstract: AN ELECTROMAGNETIC PARAMETRIC ACOUSTIC WAVE SENSOR COMPRISING A REACTIVE BRIDGE WHICH IS ENERGIZED BY MEANS OF A HIGH FREQUENCY PUMP SIGNAL. IN THE ABSENCE OF AN ACOUSTIC WAVE, THE BRIDGE IS BALANCED, PRODUCING NO OUTPUT SIGNAL. IN THE PRESENCE OF AN ACOUSTIC WAVE THE BRIDGE IS UNBALANCED, PRODUCING A DOUBLE SIDEBAND, SUPPRESSED CARRIER OUTPUT SIGNAL. THE LATTER IS COUPLED TO A PHASE DETECTOR, ALONG WITH A COMPONENT OF PUMP SIGNAL, WHEREIN AN ELECTRICAL REPLICA OF THE ACOUSTIC INPUT SIGNAL IS PRODUCED.
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公开(公告)号：US3551855A
公开(公告)日：1970-12-29
申请号：US3551855D
申请日：1969-06-06
Applicant: BELL TELEPHONE LABOR INC
Inventor： SEIDEL HAROLD
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公开(公告)号：US3479612A
公开(公告)日：1969-11-18
申请号：US3479612D
申请日：1966-11-18
Applicant: BELL TELEPHONE LABOR INC
Inventor： SEIDEL HAROLD
CPC classification number: H01S3/10092
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50.发明授权Low frequency oscillator controlled by the difference frequency of two crystals 失效由两个晶体的差分频率控制的低频振荡器
公开(公告)号：US3462703A
公开(公告)日：1969-08-19
申请号：US3462703D
申请日：1967-12-14
Applicant: BELL TELEPHONE LABOR INC
Inventor： SEIDEL HAROLD
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