公开(公告)号：JPS5527696A

公开(公告)日：1980-02-27

申请号：JP10033379

申请日：1979-08-08

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BROSIO ALBERTO ,  SEANO VITTORIO

IPC: H03G3/20 ,  H01L33/00 ,  H01S20060101 ,  H01S5/068 ,  H01S5/0683 ,  H03G20060101 ,  H03L5/00 ,  H04B10/155

公开(公告)号：NO153445B

公开(公告)日：1985-12-09

申请号：NO793173

申请日：1979-10-03

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： FAUSONE ALFREDO ,  SEANO VITTORIO

IPC: H01S5/042 ,  H01S5/062 ,  H04B10/00 ,  H03G11/04 ,  H03F1/30 ,  H04B9/00

Abstract: A nonlinear signal transducer U, such as a light-emitting diode or a semiconductive laser, is maintained at a suitable operating point by a constant biasing current and receives an electrical input signal by way of a series resistor R from a main amplifier AM of variable gain. The output voltage of the main amplifier is detected and integrated to provide a first reference voltage which is compared with the load voltage of the transducer U in a differential amplifier AE1, forming part of a first feedback loop, to adjust a voltage generator GT controlling the output voltage of the main amplifier AM so as to eliminate any voltage drop across the series resistor R as long as the input signal is absent or has an instantaneous magnitude equal to its mean value. A second feedback loop includes a peak-to-peak detector DP which emits a voltage proportional to the signal amplitude, that voltage being compared with a second reference voltage in a differential amplifier AE2 serving to adjust a current generator GC1 which controls the gain of the main amplifier AM. The second reference voltage may be varied manually or in response to changes in the output of the transducer U.

公开(公告)号：AT376082B

公开(公告)日：1984-10-10

申请号：AT543779

申请日：1979-08-09

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BROSIO ALBERTO ,  SEANO VITTORIO

IPC: H03G3/20 ,  H01L33/00 ,  H01S20060101 ,  H01S5/068 ,  H01S5/0683 ,  H03G20060101 ,  H03L5/00 ,  H04B10/155 ,  H04B9/00 ,  H01S3/13

公开(公告)号：AT375226B

公开(公告)日：1984-07-10

申请号：AT645479

申请日：1979-10-03

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： FAUSONE ALFREDO ,  SEANO VITTORIO

IPC: H04B10/00 ,  H01S5/042 ,  H01S5/062 ,  H05B44/00 ,  H04B9/00 ,  H01S3/13

Abstract: A nonlinear signal transducer U, such as a light-emitting diode or a semiconductive laser, is maintained at a suitable operating point by a constant biasing current and receives an electrical input signal by way of a series resistor R from a main amplifier AM of variable gain. The output voltage of the main amplifier is detected and integrated to provide a first reference voltage which is compared with the load voltage of the transducer U in a differential amplifier AE1, forming part of a first feedback loop, to adjust a voltage generator GT controlling the output voltage of the main amplifier AM so as to eliminate any voltage drop across the series resistor R as long as the input signal is absent or has an instantaneous magnitude equal to its mean value. A second feedback loop includes a peak-to-peak detector DP which emits a voltage proportional to the signal amplitude, that voltage being compared with a second reference voltage in a differential amplifier AE2 serving to adjust a current generator GC1 which controls the gain of the main amplifier AM. The second reference voltage may be varied manually or in response to changes in the output of the transducer U.

公开(公告)号：CH634698A5

公开(公告)日：1983-02-15

申请号：CH748479

申请日：1979-08-15

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BROSIO ALBERTO ,  SEANO VITTORIO

IPC: H03G3/20 ,  H01L33/00 ,  H01S20060101 ,  H01S5/068 ,  H01S5/0683 ,  H03G20060101 ,  H03L5/00 ,  H04B10/155 ,  H04B1/66 ,  H01S3/10 ,  H03L5/02

公开(公告)号：IL58296A

公开(公告)日：1982-08-31

申请号：IL5829679

申请日：1979-09-21

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： FAUSONE ALFRIDO ,  SEANO VITTORIO

IPC: H01S5/042 ,  H01S5/062 ,  H05B44/00 ,  H04B10/00 ,  H01S3/13 ,  H03K17/14 ,  G05F1/46

Abstract: A nonlinear signal transducer U, such as a light-emitting diode or a semiconductive laser, is maintained at a suitable operating point by a constant biasing current and receives an electrical input signal by way of a series resistor R from a main amplifier AM of variable gain. The output voltage of the main amplifier is detected and integrated to provide a first reference voltage which is compared with the load voltage of the transducer U in a differential amplifier AE1, forming part of a first feedback loop, to adjust a voltage generator GT controlling the output voltage of the main amplifier AM so as to eliminate any voltage drop across the series resistor R as long as the input signal is absent or has an instantaneous magnitude equal to its mean value. A second feedback loop includes a peak-to-peak detector DP which emits a voltage proportional to the signal amplitude, that voltage being compared with a second reference voltage in a differential amplifier AE2 serving to adjust a current generator GC1 which controls the gain of the main amplifier AM. The second reference voltage may be varied manually or in response to changes in the output of the transducer U.

公开(公告)号：DE2940159A1

公开(公告)日：1980-04-10

申请号：DE2940159

申请日：1979-10-03

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： FAUSONE ALFREDO ,  SEANO VITTORIO

IPC: H04B10/00 ,  H01S5/042 ,  H01S5/062 ,  H04L25/06 ,  H03K5/00 ,  H04B9/00

Abstract: A nonlinear signal transducer U, such as a light-emitting diode or a semiconductive laser, is maintained at a suitable operating point by a constant biasing current and receives an electrical input signal by way of a series resistor R from a main amplifier AM of variable gain. The output voltage of the main amplifier is detected and integrated to provide a first reference voltage which is compared with the load voltage of the transducer U in a differential amplifier AE1, forming part of a first feedback loop, to adjust a voltage generator GT controlling the output voltage of the main amplifier AM so as to eliminate any voltage drop across the series resistor R as long as the input signal is absent or has an instantaneous magnitude equal to its mean value. A second feedback loop includes a peak-to-peak detector DP which emits a voltage proportional to the signal amplitude, that voltage being compared with a second reference voltage in a differential amplifier AE2 serving to adjust a current generator GC1 which controls the gain of the main amplifier AM. The second reference voltage may be varied manually or in response to changes in the output of the transducer U.

公开(公告)号：IT1160592B

公开(公告)日：1987-03-11

申请号：IT6891078

申请日：1978-08-16

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： BROSIO ALBERTO ,  SEANO VITTORIO

IPC: H03G3/20 ,  H01L33/00 ,  H01S20060101 ,  H01S5/068 ,  H01S5/0683 ,  H03G20060101 ,  H03L5/00 ,  H04B10/155 ,  G05B

公开(公告)号：ATA645479A

公开(公告)日：1983-11-15

申请号：AT645479

申请日：1979-10-03

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： FAUSONE ALFREDO ,  SEANO VITTORIO

IPC: H04B10/00 ,  H01S5/042 ,  H01S5/062 ,  H05B44/00 ,  H04B9/00 ,  H01S3/13

Abstract: A nonlinear signal transducer U, such as a light-emitting diode or a semiconductive laser, is maintained at a suitable operating point by a constant biasing current and receives an electrical input signal by way of a series resistor R from a main amplifier AM of variable gain. The output voltage of the main amplifier is detected and integrated to provide a first reference voltage which is compared with the load voltage of the transducer U in a differential amplifier AE1, forming part of a first feedback loop, to adjust a voltage generator GT controlling the output voltage of the main amplifier AM so as to eliminate any voltage drop across the series resistor R as long as the input signal is absent or has an instantaneous magnitude equal to its mean value. A second feedback loop includes a peak-to-peak detector DP which emits a voltage proportional to the signal amplitude, that voltage being compared with a second reference voltage in a differential amplifier AE2 serving to adjust a current generator GC1 which controls the gain of the main amplifier AM. The second reference voltage may be varied manually or in response to changes in the output of the transducer U.

公开(公告)号：AU525230B2

公开(公告)日：1982-10-28

申请号：AU5115279

申请日：1979-09-25

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： FAUSONE ALFREDO ,  SEANO VITTORIO

IPC: H04B10/00 ,  H01S5/042 ,  H01S5/062 ,  H05B44/00 ,  G05F1/46 ,  H03C1/06 ,  H03G3/20 ,  H04B1/66

Abstract: A nonlinear signal transducer U, such as a light-emitting diode or a semiconductive laser, is maintained at a suitable operating point by a constant biasing current and receives an electrical input signal by way of a series resistor R from a main amplifier AM of variable gain. The output voltage of the main amplifier is detected and integrated to provide a first reference voltage which is compared with the load voltage of the transducer U in a differential amplifier AE1, forming part of a first feedback loop, to adjust a voltage generator GT controlling the output voltage of the main amplifier AM so as to eliminate any voltage drop across the series resistor R as long as the input signal is absent or has an instantaneous magnitude equal to its mean value. A second feedback loop includes a peak-to-peak detector DP which emits a voltage proportional to the signal amplitude, that voltage being compared with a second reference voltage in a differential amplifier AE2 serving to adjust a current generator GC1 which controls the gain of the main amplifier AM. The second reference voltage may be varied manually or in response to changes in the output of the transducer U.