公开(公告)号：US3179889A

公开(公告)日：1965-04-20

申请号：US22794562

申请日：1962-10-02

Applicant: BELL TELEPHONE LABOR INC

Inventor： KING BERNARD G

IPC: H04J3/06

CPC classification number: H04J3/0614

公开(公告)号：US3054906A

公开(公告)日：1962-09-18

申请号：US7923860

申请日：1960-12-29

Applicant: BELL TELEPHONE LABOR INC

Inventor： KING BERNARD G

IPC: H01P1/15 ,  H03K3/315

CPC classification number: H01P1/15 ,  H03K3/315

公开(公告)号：US3614201A

公开(公告)日：1971-10-19

申请号：US3614201D

申请日：1968-12-02

Applicant: BELL TELEPHONE LABOR INC

Inventor： BIAZZO MARTIN R ,  KING BERNARD G ,  ORTEL WILLIAM C G

IPC: G02F1/03 ,  G02F1/28

CPC classification number: G02F1/0305

Abstract: Acoustical ringing which results from piezoelectric effects in an electrooptical modulator is suppressed by mounting the modulator crystal between massive, acoustically absorbent, support members which also provide an electric circuit interface for applying electric signals to the modulator. Solder provides such an absorbent mounting for a lithium tantalate electrooptical modulator crystal. Both solder support members are flowed into place during the same heating interval and permitted to cool simultaneously.

公开(公告)号：US3593142A

公开(公告)日：1971-07-13

申请号：US3593142D

申请日：1969-11-20

Applicant: BELL TELEPHONE LABOR INC

Inventor： FREENY STANLEY L ,  KING BERNARD G ,  PEDERSEN THOMAS J

IPC: H04B3/04 ,  H04L5/04 ,  H04L25/03 ,  H04L25/48 ,  H04B1/00

CPC classification number: H04L5/04 ,  H04L25/03038

Abstract: A transmission system for transmitting multilevel digital signals over an analog band limited transmission medium. The digital signals to be transmitted are predistorted by a transversal preequalizer located at the transmitter which operates under the control of equalizer correction signals derived from the output of an analog-to-digital encoder at the receiver; which signals are sent from the receiver to the transmitter over a relatively low-speed signaling or reverse channel. After such predistortion the multilevel signals are transmitted using vestigial sideband techniques so that digital apparatus is required only in the transmitter and receiver with none required at intermediate points.

公开(公告)号：US3573465A

公开(公告)日：1971-04-06

申请号：US3573465D

申请日：1968-12-02

Applicant: BELL TELEPHONE LABOR INC

Inventor： KING BERNARD G ,  RIESZ RICHARD P

IPC: G02F1/03 ,  H04B9/00

CPC classification number: G02F1/0327

Abstract: A Gunn effect device is utilized to provide pulses of the high amplitude and frequency needed to drive an optical modulator, such as a lithium tantalate crystal for efficiently utilizing the bandwidth of light transmitted through the modulator. An acoustically absorbent mounting is provided for the modulator to suppress acoustical ringing resulting from piezoelectric effects in the modulator. The modulation system is initially aligned by simulating at a comparatively low frequency the drive amplitudes in order to establish a maximum condition of modulation in the optical part of the system. Thereafter, signals at the Gunn effect device output rate are supplied for controlling the modulator. Information-representative signals coupled to the modulator through the Gunn effect device are synchronized with the optical system utilizing the modulator.