公开(公告)号：US3559108A

公开(公告)日：1971-01-26

申请号：US3559108D

申请日：1969-08-21

Applicant: BELL TELEPHONE LABOR INC

Inventor： SEIDEL HAROLD

IPC: H01P1/15 ,  H01P5/12 ,  H03H7/10

CPC classification number: H01P1/15

Abstract: THE PARASTIC ELEMENTS ASSOCIATED WITH SWITCHING DIODES IN THEIR HIGH AND LOW CONDUCTIVITY STATES ARE DUALIZED. IN ASSOCIATION WITH A QUADRATURE HYBRID COUPLER, ONE HIGH CONDUCTIVITY DIODE AND ONE LOW CONDUCTIVITY DIODE FORM A BALANCED BRIDGE NETWORK WHICH INHIBITS SIGNAL TRANSMISSION. UPON SWITCHING ONE OF THE DIODES SO THAT BOTH ARE IN THE SAME CONDUCTIVITY STATE, THE COUPLER-DIODE NETWORK FORMS THE EQUIVALENT OF EITHER A SERIES-CONNECTED, SERIESRESONANT CIRCUIT, OR A PARALLEL-CONNECTED, PARALLEL-RESONANT CIRCUIT, DEPENDING UPON THE CONDUCTIVITY STATE OF THE

DIODES, BY CASCADING COUPLERS, A SWITCH HAVING AN ARBITRARILY HIGH ATTENUATION IN THE "OPEN" STATE, AND A SPECIFIED BAND-PASS CHARACTERISTIC IN THE "CLOSED" STATE IS PRODUCED. A SIMILAR ARRANGEMENT USING MAGIC-T HYBRIDS IS ALSO DISCLOSED.

公开(公告)号：US3486134A

公开(公告)日：1969-12-23

申请号：US3486134D

申请日：1967-04-28

Applicant: BELL TELEPHONE LABOR INC

Inventor： SEIDEL HAROLD

IPC: H03L7/00 ,  H03C3/02

CPC classification number: H03L7/00

公开(公告)号：US3471798A

公开(公告)日：1969-10-07

申请号：US3471798D

申请日：1967-12-26

Applicant: BELL TELEPHONE LABOR INC

Inventor： SEIDEL HAROLD

IPC: H03F1/32 ,  H03F1/26 ,  H03F1/00 ,  H03F3/68

CPC classification number: H03F1/3241 ,  H03F1/3229 ,  H03F2200/198

公开(公告)号：US3918003A

公开(公告)日：1975-11-04

申请号：US51851074

申请日：1974-10-29

Applicant: BELL TELEPHONE LABOR INC

Inventor： SEIDEL HAROLD

IPC: H03G3/00 ,  H03G3/20 ,  H03G3/30

CPC classification number: H03G3/20 ,  H03G3/005

Abstract: Automatic gain control (AGC) is achieved by means of combined feedforward and feedback means. The feedforward AGC controls the signal level in the main signal path. The feedback AGC stabilizes the signal level in the AGC circuit. The use of feedforward techniques permits the AGC system to respond rapidly notwithstanding the presence of a narrowband filter in the AGC circuit, where such filter is included to extract a reference signal from among the many signals present in the main signal path.

Abstract translation: 通过组合的前馈和反馈手段实现自动增益控制（AGC）。 前馈AGC控制主信号路径中的信号电平。 反馈AGC稳定AGC电路中的信号电平。 使用前馈技术允许AGC系统快速响应，尽管在AGC电路中存在窄带滤波器，其中包括这样的滤波器以从主信号路径中存在的许多信号中提取参考信号。

公开(公告)号：US3895321A

公开(公告)日：1975-07-15

申请号：US49615174

申请日：1974-08-09

Applicant: BELL TELEPHONE LABOR INC

Inventor： SEIDEL HAROLD

IPC: H03H7/18 ,  H03H7/21 ,  H03H7/48

CPC classification number: H03H7/21 ,  H03H7/18 ,  H03H7/48

Abstract: A procedure for synthesizing any prescribed differential phase shift by means of passive lumped element, minimum phase networks is outlined. In a first embodiment of the invention, the phase shifters are made of quadrature couplers. In a second embodiment of the invention, bridged-T phase shifters are employed.

Abstract translation: 概述了通过无源集总元件，最小相位网络合成任何规定的差分相移的过程。

公开(公告)号：US3883829A

公开(公告)日：1975-05-13

申请号：US47211674

申请日：1974-05-22

Applicant: BELL TELEPHONE LABOR INC

Inventor： SEIDEL HAROLD

IPC: H01F19/04 ,  H03H7/48 ,  H03H7/00 ,  G05F3/04

CPC classification number: H01F19/04 ,  H03H7/48

Abstract: The effective turns ratio of a transformer is modified by sampling the transformer primary current and injecting at least one vernier current proportional thereto into the secondary circuit of said transformer. The sampling is done by at least one vernier transformer which is arranged to respond to asymmetric mode excitation but to be transparent to symmetric mode currents.

Abstract translation: 变压器的有效匝数比通过对变压器初级电流进行采样并将与其成比例的至少一个游标电流注入到所述变压器的次级电路中来进行修改。 采样由至少一个游标变换器完成，该变换器被布置为响应于非对称模式激励，但是对称模式电流是透明的。

公开(公告)号：US3638134A

公开(公告)日：1972-01-25

申请号：US3638134D

申请日：1969-11-26

Applicant: BELL TELEPHONE LABOR INC

Inventor： BEURRIER HENRY R ,  SEIDEL HAROLD

IPC: H03F1/34 ,  H04B3/06 ,  H03F1/26

CPC classification number: H04B3/06 ,  H03F1/345

Abstract: An impedance match at the external terminals of an amplifier are simulated by cancelling any component of the signal wave reflected by the amplifier. At the input terminal of the amplifier, the cancelling wave is obtained by sampling the amplified signal and directionally coupling a portion thereof into the amplifier input network in a direction away from the amplifier. At the amplifier output terminal, the cancelling wave is obtained by sampling any wave reflected back towards the amplifier, and injecting a portion of this wave into the input end of the amplifier.

Abstract translation: 在放大器的外部端子处的阻抗匹配通过消除由放大器反射的信号波的任何分量来模拟。 在放大器的输入端子处，通过对放大的信号进行采样并将其一部分以远离放大器的方向定向耦合到放大器输入网络中而获得抵消波。 在放大器输出端子处，通过对向放大器反射的任何波进行采样，并将该波的一部分注入放大器的输入端，获得抵消波。

公开(公告)号：US3619796A

公开(公告)日：1971-11-09

申请号：US3619796D

申请日：1970-04-27

Applicant: BELL TELEPHONE LABOR INC

Inventor： SEIDEL HAROLD

IPC: G02F1/125 ,  G02F1/377 ,  G02F1/39 ,  H03F13/00 ,  H03F7/04

CPC classification number: H03F13/00 ,  G02F1/125 ,  G02F1/377 ,  G02F1/395

Abstract: The phase deficiency in a parametric traveling-wave device, due to dispersion in the wavepath, is compensated by means of a grating distributed along a surface of an otherwise uniform nonlinear material. In one embodiment of the invention the grating is fixed. In a second, tunable embodiment of the invention, an acoustic surface wave serves as a moving grating.

公开(公告)号：US3614647A

公开(公告)日：1971-10-19

申请号：US3614647D

申请日：1969-11-04

Applicant: BELL TELEPHONE LABOR INC

Inventor： SEIDEL HAROLD

IPC: H03H7/48 ,  H03F3/68

CPC classification number: H03H7/48

Abstract: A multibranch array comprising a multibranch input network for dividing a signal into n equal signal components, where n is any integer, and a multibranch output network for recombining said components in phase. The networks are interconnected by means of n branch circuits which include first phase shifters for producing phase differences among the branch signals equal to different multiples of 180 m/n*, where m is an integer less than n. Second phase shifters produce complementary phase shifts to restore the signals to a common phase for recombination in the output network. Amplifiers or other circuit elements are located in each of the branch circuits between pairs of phase shifters.

公开(公告)号：US3613028A

公开(公告)日：1971-10-12

申请号：US3613028D

申请日：1969-10-21

Applicant: BELL TELEPHONE LABOR INC

Inventor： SEIDEL HAROLD

IPC: H01S3/098 ,  H01S3/136 ,  H01S3/00

CPC classification number: H01S3/1109 ,  H01S3/107 ,  H01S3/136

Abstract: A laser, mode locked by an intracavity phase modulator, can support either of two separate pulse trains and, typically, will switch erratically between the two. To avoid the resulting instability in the laser output, it is proposed to phase modulate the laser at the synchronous frequency, as is done in the prior art and, simultaneously, to phase modulate it at the second harmonic of the synchronous frequency. So modulated, the two pulse trains are phase locked to produce a single, stabilized output pulse train.