公开(公告)号：DE69804193T2

公开(公告)日：2002-10-02

申请号：DE69804193

申请日：1998-12-01

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03F1/32 ,  H03G1/04

Abstract: The present invention provides an improved pilot detection technique for a control system (200) comprising an electrical circuit (108) that produces distortion and which applies the pilot signal to the electrical circuit and uses information obtained from the pilot signal to cancel the distortion from the electrical circuit.

公开(公告)号：CA2279031C

公开(公告)日：2002-01-22

申请号：CA2279031

申请日：1999-07-29

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN ,  PATEL MOHAN

IPC: H03L7/00 ,  H03F1/32 ,  H04B1/12 ,  H04B3/10 ,  G05B23/00

Abstract: A control system comprising an electrical circuit that produces distortion where the electrical circuit has a frequency band of operation. A pilot modulated carrier signal is generated and is cause to traverse across the frequency band of operation of the electrical circuit. Information obtained from the traversing pilot modulated carrier signal when it is determined that there is no interference between any signal appli ed to or generated by the electrical circuit. The information is used by the control system to substantially cancel the distortion.

公开(公告)号：DE69900116T2

公开(公告)日：2001-11-29

申请号：DE69900116

申请日：1999-06-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN ,  PATEL MOHAN ,  WEN JACK CHI-CHIEH

IPC: H03M1/06 ,  H03M1/08 ,  H03M1/10 ,  H03M1/14 ,  H03M1/18

Abstract: An A/D system (10) provides an expanded SFDR when compared to the SFDR of individual A/D(s) that make up the A/D system. In response to an analog input signal(s) whose amplitude would result in a narrower SFDR for a first A/D (12), the A/D system uses an amplitude adjuster (14) which receives the analog input signal and produces an amplitude-limited signal with resulting signal distortion (S + D) to the first A/D (12). By amplitude-limiting the analog input signal, the A/D system produces the resulting signal distortion but reduces or "clips" the amplitude of the analog input signal, thereby improving the SFDR performance of the first A/D by reducing the spurious distortion produced by the first A/D. The signal distortion (D) resulting from the amplitude adjustment is routed to a second A/D (15). The first A/D converts the amplitude-limited analog signal to a digital signal (S + D ) with an expanded SFDR due to the lower amplitude of the adjusted analog signal. The second A/D (15) receives the portion of the analog input signal removed by clipping which can be referred to as the signal distortion (D). The second A/D converts the signal distortion, which typically has a lower amplitude than the adjusted analog signal, to a digital signal (D1) with at least an acceptable SFDR. The A/D system combines (16) the resulting digital signals from the first and second A/Ds to produce the desired converted digital signal with an extended SFDR. The SFDR is extended because the relative difference is increased between the amplitudes of the digital output signal and the spurious distortion when compared to the amplitudes of the digital output signal and the spurious distortion if the analog input signal has been converted by the first A/D without amplitude adjustment.

公开(公告)号：CA2278872C

公开(公告)日：2001-10-30

申请号：CA2278872

申请日：1999-07-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03G9/00 ,  H03F1/32 ,  H03F1/26

Abstract: The present invention is a method and a feed forward circuit incorporating an automatic gain and phase controller for controlling amplitude gain and phase shift being applied to an input signal of an amplifier undergoing changing conditions. The automatic gain and phase controller is configured to monitor the amplifier output signals and manipulate the amplitude and phase of the amplifier input signal (via a gain and phase adjuster) such tha t the amplitude and phase of the amplifier output signals are substantially identical to those o f previous amplifier output signals.

公开(公告)号：DE69900042T2

公开(公告)日：2001-05-23

申请号：DE69900042

申请日：1999-06-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN ,  CHI-CHIEH WEN JACK ,  PATEL MOHAN

IPC: H03D7/16 ,  H03F1/32 ,  H03D7/00 ,  H03D3/00

Abstract: A frequency mixing system (10) provides an expanded dynamic range when compared to the dynamic range(s) of an individual mixer(s) (12) that makes up the frequency mixing system. The frequency mixing system adjusts (by 14) the amplitude of an input signal (S) to be frequency mixed (in 12) to produce a frequency converted signal (S + D ) with an acceptable and/or lower (when compared to the amplitude of intermodulation distortion produced by mixing the input signal without amplitude adjustment) amplitude of intermodulation distortion. If the input signal were frequency mixed without the amplitude adjustment, an unacceptable and/or higher level of intermodulation distortion would result (when compared to the corresponding intermodulation distortion if the amplitude-adjusted signal were mixed by an individual mixer). Adjusting the amplitude of the input signal creates an adjusted signal (S+D) with signal distortion on a first path (20). The frequency mixing system uses a feed-forward arrangement to reduce the signal distortion created by adjusting the amplitude of the input signal, thereby producing the desired frequency converted signal with the lower and/or acceptable level of intermodulation distortion. For example, the signal distortion (D) from the first path can be placed on a second path (22), frequency converted using a second mixer (38) on the second path, and subsequently put back into the first path to combine (at 16) with the signal distortion on the first path to provide the desired frequency converted signal with the acceptable and/or lower level of intermodulation distortion. By increasing the relative difference between the amplitudes of the desired frequency converted signal and of the intermodulation distortion, the frequency mixing system provides an expanded dynamic range.

公开(公告)号：BR0004561A

公开(公告)日：2001-04-03

申请号：BR0004561

申请日：2000-08-10

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03G1/04 ,  H03F1/32 ,  H03F3/20 ,  H03F3/21

Abstract: Method and apparatus for substantially eliminating distortion produced by a processing circuit where the distortion produced by a first circuit with similar characteristics as the processing circuit is modified and the modified distortion is applied to the processing circuit. The distortion produced by the first circuit is modified based on information derived from distortion produced by the processing circuit. The modified distortion, when applied to the processing circuit, combines destructively with distortion produced by the processing circuit.

公开(公告)号：BR0003387A

公开(公告)日：2001-04-03

申请号：BR0003387

申请日：2000-08-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GHANADAN REZA ,  MYER ROBERT EVAN

IPC: H03G1/04 ,  H03F1/32

Abstract: A gain and phase control system performs a gain (or phase) adjustment based on the results of a previous gain (or phase) adjustment after an intervening phase (or gain) adjustment. A gain adjustment is based on the results of a previous gain adjustment rather than on the results of an intervening phase adjustment. A phase adjustment is based on the results of a previous phase adjustment rather than the results of an intervening gain adjustment. As such, the above-mentioned increase in error signal does not occur because a gain adjustment is based on the results of the previous gain adjustment, and a phase adjustment is based on the results of the previous phase adjustments. In accordance with another aspect of the present invention, the gain and phase control system makes a gain (or phase) adjustment in parallel with detecting the results from a previous phase (or gain) adjustment, thereby taking advantage of the delay between adjustment and detection of the resulting error signal to improve the convergence rate. For example, the gain and phase control system can perform single alternating gain and phase adjustments and make a gain (or phase) adjustment while detecting the error signal resulting from a preceding phase (or gain) adjustment. When the error signal resulting from the gain (or phase) adjustment is being detected, the gain and phase control system makes a phase (or gain) adjustment using the results detected from the preceding phase (or gain) adjustment.

公开(公告)号：AU5357600A

公开(公告)日：2001-03-08

申请号：AU5357600

申请日：2000-08-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H01P5/16 ,  H01P5/18 ,  H01R31/06

公开(公告)号：BR9903411A

公开(公告)日：2000-08-22

申请号：BR9903411

申请日：1999-08-04

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H04B3/10 ,  G05B19/00 ,  H03F1/32

Abstract: A synchronous pilot detection circuit coupled to a control system which comprises an electrical circuit that produces distortion such that when a pilot signal is applied to the electrical circuit the distortion and any residual distortion is substantially canceled.

公开(公告)号：AU4888199A

公开(公告)日：2000-04-13

申请号：AU4888199

申请日：1999-09-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03D13/00 ,  H04B7/165 ,  H03D3/02

Abstract: The present invention is a method and an apparatus for measuring phase differences between signals A and B using an absolute voltage value for each phase difference between +/-180 DEG . This is accomplished using a third signal C, which is a signal having a phase approximately equal to the average phase between signals A and B. Signals C and A are subsequently amplitude limited and mixed to produce a fourth signal D, which is a signal having associated an absolute voltage value for each degree of phase difference between +/-180 DEG for signals A and B.