Keith Edward Conroy, 53Bensalem, PA

7603044, Oct 13, 2009

Dec 3, 2008

12/327753

Keith Conroy - Perkasie PA, US
Omer Acikel - San Diego CA, US

Applied Micro Circuits Corporation - San Diego CA

H04B 10/06

398202, 398208, 398209, 398152, 398205, 398206, 385 11

A system and method are provided for calibrating orthogonal polarity in a multichannel optical transport network (OTN) receiver. The method accepts a composite signal and separates the polarization of the signal into a pair of 2-phase shift keying (2-PSK) modulated input signals via Ix and Qx optical signal paths, where n≧1. Likewise, a pair of 2-PSK modulated input signals are accepted via Iy and Qy optical signal paths where p≧1. Polarization-adjusted I′x, Q′x, I′y, and Q′y signals are generated. An average magnitude is compared to either 2×the absolute magnitude of (I′x and Q′x), or 2×the absolute magnitude of (I′y and Q′y). The average magnitude value can be used that is either 2×(a predetermined peak signal amplitude), or the sum of the absolute magnitudes of (I′x and Q′x) and (I′y and Q′y). The polarization-adjusted I′x, Q′x, I′y, and Q′y signals are modified until the magnitude comparison is about zero.

7962043, Jun 14, 2011

Jun 20, 2008

12/143541

Keith Conroy - Perkasie PA, US
Omer Acikel - San Diego CA, US
Francesco Caggioni - Winchester MA, US

Applied Micro Circuits Corporation - San Diego CA

H04B 10/00
H04B 10/04

398152, 398188, 398201

A system and method are provided for controlling time delay in a multichannel optical transport network transmission device. The method accepts a pair of 2-phase shift keying (2PSK) modulated signals via Ix and Qx electrical signal paths, where n>1, and a pair of 2-PSK modulated signals via Iy and Qy electrical signal paths where p>1. A voltage V on the Ix signal path is compared with a voltage V on the Qx signal path, and a VOx voltage in generated, which is minimized by adjusting time delay modules in the Ix and Qx signals paths. Likewise, a voltage V (Iy) is compared with a voltage V (Qy), and a VOy voltage is generated and minimized. Subsequent to minimizing VOx and VOy, the sum of V and V (V) is compared with the sum of V and V (V), and a VOxy voltage is generated and minimized.

7965941, Jun 21, 2011

Sep 5, 2008

12/205776

Keith Conroy - Perkasie PA, US
Omer Acikel - San Diego CA, US
Francesco Caggioni - Winchester MA, US

Applied Micro Circuits Corporation - San Diego CA

H04J 14/00
H04J 14/08
H04B 10/04
H04B 10/12

398102, 398 53, 398188

A system and method are provided for controlling time delay in a multichannel optical transport network (OTN) transmission device using time domain reflectometry (TDR) measurements. The method accepts a pair of 2-phase shift keying (2-PSK) modulated signals via Ix and Qx electrical signal paths, where n>1. Likewise, a pair of 2-PSK modulated signals are accepted via Iy and Qy electrical signal paths where p>1. Using TDR modules, signal reflections are measured from an output port for each signal path. The method minimizes time delay differences in the signal reflections for the Ix, Qx, Iy, and Qy signals paths by using the signal reflection measurements to adjust time delay modules in each signal path.

7965946, Jun 21, 2011

Jul 8, 2008

12/169414

Keith Conroy - Perkasie PA, US
Omer Acikel - San Diego CA, US
Francesco Caggioni - Winchester MA, US

Applied Micro Circuits Corporation - San Diego CA

H04B 10/00

398154, 398152, 398205

A system and method are provided for calibrating skew in a multichannel optical transport network (OTN) transmission device. The method accepts a pair of 2-phase shift keying (2PSK) modulated signals via Ix and Qx electrical signal paths, where n>1. Likewise, a pair of 2-PSK modulated signals are accepted via Iy and Qy electrical signal paths where p>1. The Ix, Qx, Iy, and Qy signals are correlated to a preamble/header portion of an OTN frame. A voltage on the Ix signal path is compared with Qx, and VO voltage is generated. A voltage on the Iy signal path is compared with Qy, and VO is generated. One of the Ix or Qx voltages is compared with one of Iy or Qy voltages to generate VOxy. Then, the VO voltages are minimized in response to adjusting time delay modules in the Ix, Qx, Iy, and Qy signals paths.

7970285, Jun 28, 2011

Sep 30, 2008

12/242433

Keith Conroy - Perkasie PA, US
Omer Acikel - San Diego CA, US
Francesco Caggioni - Winchester MA, US

Applied Micro Circuits Corporation - San Diego CA

H04J 14/00
H04J 14/06
H04J 14/08
H04B 10/00
H04B 10/12

398154, 398 53, 398 65, 398102, 398188

A system and method are provided for calibrating temporal skew in a multichannel optical transport network (OTN) transmission device. The method accepts a pair of 2-phase shift keying (2-PSK) modulated signals, as well as a pair of 2-PSK modulated signals. The 2-PSK and 2-PSK signals are converted to 2-PSK and 2-PSK optical signals, respectively. The 2-PSK and 2-PSK optical signals are orthogonally polarized and transmitted. A timing voltage is generated that is responsive to the intensity of the orthogonally polarized signals. The timing voltage is correlated to a reference frame calibration pattern associated with a preamble/header portion of an OTN frame. Then, the timing voltages associated with the Ix, Qx, Iy, and Qy signal paths are compared, and the misalignment between the timing voltages and the reference frame calibration pattern is minimized in response to adjusting time delay modules in the Ix, Qx, Iy, and Qy signal paths.

8244143, Aug 14, 2012

Sep 2, 2009

12/552500

Keith Conroy - Perkasie PA, US
Omer Acikel - San Diego CA, US

Applied Micro Circuits Corporation - San Diego CA

H04B 10/06
H04B 10/00

398210, 398202, 398208

A system and method are provided for calibrating orthogonal polarity in a multichannel optical transport network (OTN) receiver. The method accepts a composite signal and separates the polarization of the signal into a pair of 2-phase shift keying (2-PSK) modulated input signals via Ix and Qx optical signal paths, where n≧1. Likewise, a pair of 2-PSK modulated input signals are accepted via Iy and Qy optical signal paths where p≧1. Polarization-adjusted I′x, Q′x, I′y, and Q′y signals are generated. An average magnitude is compared to either 2× the absolute magnitude of (I′x and Q′x), or 2× the absolute magnitude of (I′y and Q′y). The average magnitude value can be used that is either 2× (a predetermined peak signal amplitude), or the sum of the absolute magnitudes of (I′x and Q′x) and (I′y and Q′y). The polarization-adjusted I′x, Q′x, I′y, and Q′y signals are modified until the magnitude comparison is about zero.

5533054, Jul 2, 1996

Jul 9, 1993

8/089973

John J. DeAndrea - Lawrenceville NJ
Keith M. Conroy - Philadelphia PA

Technitrol, Inc. - Feasterville PA

H04L 2549

375286

A data transmitter circuit includes a pseudoternary conversion circuit for converting a binary logic signal to a differential pseudoternary signal having symmetric rise and fall characteristics. The output of the pseudoternary conversion circuit is filtered and passed to an electrically conductive medium via an isolation transformer. The conversion circuit includes a symmetric arrangement of toggle circuits which respond to transitions in respective complementary binary signals constituting a differential binary input signal. Voltage dividers are connected to the output terminals of the toggle circuits for providing three levels of output voltages in response to the logical states of the toggle circuits.

5796781, Aug 18, 1998

Apr 5, 1995

8/417239

John J. DeAndrea - Lawrenceville NJ
Keith M. Conroy - Philadelphia PA

Technitrol, Inc. - Trevose PA

H04L 2506

375288

A data received is provided with DC restoration circuitry for correcting the DC level of received multi-level data signals. A DC shift detection circuit detects whether the received DC level multi-level signals has shifted due to a predominance of one of the data levels in the data stream. A correction circuit responds to the shift detection circuit by applying a corrective bias to an isolation transformer. Alternatively, the correction circuit applies a corrective bias to the received signals within the receiver circuit.