James V Wernlund from 445 Michigan Ave, Melbourne, FL 32903, age 71, Phone: 321 725-9175

Us Patents

Dual Pulse Width Modulated Driver For Thermo-Electric Cooler
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US Patent:

6519949, Feb 18, 2003
Filed:

Nov 13, 2000
Appl. No.:

09/712830
Inventors:

James Vincent Wernlund - Indialantic FL
Dimitrios Nikolaidis - Melbourne FL
Assignee:

JDS Uniphase Corporation - San Jose CA
International Classification:

F25B 2102
US Classification:

62 37, 62159, 372 34
Abstract:

A dual pulse width modulated driver controls the operation of a thermo-electric cooler for stabilizing the operating temperature of a laser. The pulse width modulator has complementary outputs coupled to control inputs of dual pairs of complementary polarity electronic switching elements, that are coupled in circuit between first and second power supply terminals, and a pair of output nodes. The output nodes are coupled in common through a low pass filters to drive terminals of a thermoelectric cooling element. The thermal output generated by the thermoelectric cooling element is coupled to the laser. The thermal output of the cooling element is monitored by a temperature sensing element mounted with the laser and provides an output voltage in linear proportion of its thermal input. This output voltage is fed back through a temperature control servo loop to a differential summing circuit, which is also coupled to receive a reference voltage used to control the duty cycle of the pulse width modulator. The output of the differential summing circuit is filtered through a low pass loop filter to eliminate the modulators switching frequency component in the voltage fed back from the thermistor.

Reference Frequency Quadrature Phase-Based Control Of Drive Level And Dc Bias Of Laser Modulator
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US Patent:

6539038, Mar 25, 2003
Filed:

Nov 13, 2000
Appl. No.:

09/712829
Inventors:

James Vincent Wernlund - Indialantic FL
Alen Fejzuli - Palm Bay FL
Stephen Philip Reddy - Melbourne FL
Assignee:

JDS Uniphase Corporation - San Jose CA
International Classification:

H10S 300
US Classification:

372 3802, 372 25, 372 26
Abstract:

A single reference tone/frequency-based control scheme adjusts the DC bias voltage and modulation signal drive level to an external X-cut lithium niobate Mach Zehnder modulator, in accordance with phase quadrature components of the output of the single tone frequency generator. A pair of phase quadrature feedback loops are coupled through a loop filter of a common feedback path electo-optically coupled to monitor the optical output of the laser modulator. Quadrature-phase (Q) and in-phase (I) frequency components are respectively coupled to respective Q and I channel phase detectors, coupled to synchronous demodulators for the Q and I channel feedback loops. The phase detectors produce respective error voltages that close Q and I channel feedback loops and control the optical extinction ratio and DC bias voltage of the modulator.

Mach-Zehnder Modulator Bias And Driver Gain Control Mechanism
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US Patent:

6700907, Mar 2, 2004
Filed:

Jun 29, 2001
Appl. No.:

09/897538
Inventors:

David Schneider - Melbourne FL
James Vincent Wernlund - Indialantic FL
Assignee:

JDS Uniphase Corporation - San Jose CA
International Classification:

H01S 310
US Classification:

372 26, 250205, 359181
Abstract:

A microcontroller-based controller executes interleaved DC bias and gain control routines using monitored values of the monitored photocurrent output signal of a Mach-Zehnder laser modulator to derive a gain setting for the modulation drive signal and a bias level setting for the DC bias level, without tuning or adjustment. Subsequent to convergence of the gain and bias level settings, the control unit may repetitively interrupt and restart the DC bias and gain control routine at intervals that are staggered in a random time fashion, to achieve spectral dispersion of the gain and bias level settings, and provide insensitivity to periodic environmental noise.

Transmitter With Laser Monitoring And Wavelength Stabilization Circuit
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US Patent:

7091462, Aug 15, 2006
Filed:

Aug 25, 2003
Appl. No.:

10/647558
Inventors:

Arthur G. Wilson - West Melbourne FL, US
David Slapo, Jr. - Palm Bay FL, US
James V. Wernlund - Indialantic FL, US
Assignee:

JDS Uniphase Corporation - Milpitas CA
International Classification:

G01J 1/32
H01S 3/10
H01S 3/04
US Classification:

250205, 372 20, 372 32, 372 34
Abstract:

An optical monitoring circuit includes a photoelectric device such as a photo-detector that produces a signal in response to incident light thereon corresponding to a characteristic of the incident light such as intensity, or wavelength. A light source is disposed within the circuit for emitting a beam of light, a portion of which is to be incident upon the photoelectric device. The photoelectric device when reversed biased provides an output electrical signal from which the intensity of light from the light source impinging thereon can be determined. The photoelectric device when forward biased provides an output signal from which the temperature of the photoelectric device can be determined. A method and circuit are disclosed for calibrating out the unwanted effect of light from the light source affecting accuracy of the determined temperature derived from the output signal when the photoelectric device is forward biased.

Photodiode Bias Controller For Optical Receiver
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US Patent:

7433606, Oct 7, 2008
Filed:

Jun 24, 2005
Appl. No.:

11/166599
Inventors:

James V. Wernlund - Indialantic FL, US
Brandon W. Stark - Palm Bay FL, US
Assignee:

JDS Uniphase Corporation - Milpitas CA
International Classification:

H04B 10/06
G01J 1/44
US Classification:

398202, 398213, 250214 R
Abstract:

A method of, and an apparatus for, biasing photodiodes used in optical receivers or optical transceivers includes an electronic circuit for generating a bias voltage for the photodiode and a processor having a pulse-width modulation unit that produces pulse-width modulated pulses at a predetermined number of duty cycle values M. The processor is coupled to the electronic circuit such that a magnitude of the bias voltage is dependent upon a duty cycle value of at least one of the pulse-width modulated pulses. Advantageously, the processor includes a program for modulating the pulse-width modulated pulses generated by the processor between two different duty cycle values such that a number of obtainable bias voltages is greater than M. The result is a significant reduction in the number of necessary components.

Dc To Ac Converter That Generates The Sine Wave From The Pulse Width Modulated Signal
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US Patent:

8345451, Jan 1, 2013
Filed:

Nov 8, 2010
Appl. No.:

12/942002
Inventors:

James V. Wernlund - Indialantic FL, US
Roger F. Wernlund - Indialantic FL, US
Zachary J. Wernlund - Durham NC, US
Christian J. Wernlund - Palm City FL, US
International Classification:

H02M 3/335
H02M 1/12
H02M 1/14
US Classification:

363 17, 363 40, 363 41, 363 95, 363 98, 363131, 363132
Abstract:

A method and apparatus for converting DC electricity to AC electricity, the AC electricity having a sine wave shape. DC electricity is supplied to a pulse width modulator. A pulse width modulated signal is formed from the DC electricity, the pulse width modulated signal comprising a plurality of pulses, each pulse having a duration representing an amplitude of the sine wave during an interval of the sine wave represented by the pulse, the pulse width modulated signal comprising a plurality of pulses (or a pulse train) during one sine wave period. The sine wave is generated from the pulse width modulated signal, values of the sine wave during successive sine wave intervals responsive to the duration of the pulse that represents the sine wave interval.

Device For Sending And Receiving Sata Signals Over An Optical Fiber Link
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US Patent:

20130302037, Nov 14, 2013
Filed:

Jan 28, 2013
Appl. No.:

13/751319
Inventors:

James V. Wernlund - Indialantic FL, US
Shawn E. Karr - Melbourne FL, US
Tuanc D. Diep - Palm Bay FL, US
International Classification:

H04B 10/25
US Classification:

398141
Abstract:

A system for transmitting an optical signal between a host and a device according to a SATA protocol. The system comprises a transmitting-side converter for generating a logic one voltage value responsive to a data one value from an information source, for generating a logic zero voltage value responsive to a data zero value from the information source, for generating an idle state logic voltage value, wherein the idle state logic voltage value is (logic one voltage value+logic zero voltage value)/2, the transmitting-side converter comprising only linear functions to preserve the idle state logic voltage value, and an electrical-to-optical converter for converting the logic one, logic zero and the idle state logic voltage values to an optical signal further comprising respective logic one, logic zero and idle state optical values and for supplying the optical signal to an optical communications medium.

Numerically Controlled Phase Lock Loop Synthesizer/Modulator And Method
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US Patent:

54444209, Aug 22, 1995
Filed:

Sep 29, 1994
Appl. No.:

8/313606
Inventors:

James V. Wernlund - Indialantic FL
Assignee:

Harris Corporation - Melbourne FL
International Classification:

H03D 300
H03C 300
H03L 700
H03L 7091
US Classification:

331 1R
Abstract:

A phase lock loop (PLL) circuit and method in which a PLL circuit locks on a variable input phase by providing an instantaneous phase value of a signal from an oscillator at periodic intervals, and by providing phase corrective signals to the oscillator at the same periodic intervals by comparing an instantaneous value of the variable phase to the corresponding instantaneous value of the oscillator signal phase, the phase corrective signals adjusting the phase of the oscillator signal to the predetermined phase. The PLL circuit may also lock on a predetermined frequency by providing frequency corrective signals until a difference between the predetermined frequency and the frequency of oscillator signal is smaller than a predetermined threshold.

Resumes

Vice President & Systems Engineering At Triple Play Communications

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Location:

Melbourne, Florida Area

Industry:

Telecommunications

Experience:

Triple Play Communications (Telecommunications industry): Vice President & Systems Engineering, (July 2006-Present) Responsible for the systems level design of telecommunications equipment. Additional responsibilities include the detailed circuit design of the equipment as w...