Kenneth B Stern

US Patent:

6774694, Aug 10, 2004

Filed:

Dec 24, 2002

Appl. No.:

10/328637

Inventors:

Kenneth J. Stern - Watertown MA
Jeff W. Barrell - Newton MA
Paul S. Cheung - North Andover MA
Thomas Alan Gaiser - Amherst NH

Assignee:

Analog Devices, Inc. - Norwood MA

International Classification:

H03H 1126

US Classification:

327276, 327284, 327294

Abstract:

A timing vernier applies a pair of stable bias voltages to intermediate points of an impedance string to establish reliable and calibratable delay cell biases for a fine multiplexer. A coarse input multiplexer is switched to a new timing signal substantially immediately after passing a prior valid timing signal to maximize the time prior to each valid output that the waveform is independent of the prior delay pattern. Logic circuitry is provided for three different phase differential regimes between successive timing signals to ensure that invalid output signals separated by less than a clock period are not produced. Mask commands are inserted into a series of timing control commands to equalize the average rates of writing and reading out the timing control commands with the mask commands skipped at readout.

US Patent:

7050919, May 23, 2006

Filed:

Nov 19, 2003

Appl. No.:

10/718215

Inventors:

Kenneth Stern - Watertown MA, US

Assignee:

Analog Devices, Inc. - Norwood MA

International Classification:

G06F 19/00
H03H 11/26
G01C 23/00

US Classification:

702106, 3241581, 327262, 341122, 702 79

Abstract:

A method for autocalibrating a plurality of phase-delayed clock signal edges within a reference clock period includes measuring delay spacing between the plurality of clock signal edges, calculating programmed delay spacing, calculating ideal signal edges from the programmed delay spacing and adjusting the clock signal edges to match the respective ideal signal edges. A plurality of calibrated clock signal edges is produced that are selectively available to a user.

US Patent:

7272526, Sep 18, 2007

Filed:

Apr 6, 2006

Appl. No.:

11/400447

Inventors:

Kenneth Stern - Watertown MA, US

Assignee:

Analog Devices, Inc. - Norwood MA

International Classification:

G06F 19/00
H03L 7/00
G01R 35/00

US Classification:

702106, 327161, 327293, 702 79

Abstract:

An apparatus for measuring the time delay between adjacent clock edges includes target and delay signal paths, a variable delay module in said delay signal path, the delay cell having a delay bias input, and a phase detector having respective inputs coupled to the target and delay signal paths. The variable delay module is operable to delay a first clock signal on the delay path so that a bias input signal presented to the delay bias input, when a bias input signal is present, corresponds to the time delay between the first clock signal and a second clock signal on the target signal path.

US Patent:

20060184333, Aug 17, 2006

Filed:

Apr 6, 2006

Appl. No.:

11/400511

Inventors:

Kenneth Stern - Watertown MA, US

International Classification:

G01R 35/00

US Classification:

702106000

Abstract:

A method of calibrating a timing vernier includes autocalibrating a plurality phase-delayed clock signal edges to match respective ideal signal edges, the phase-delayed clock signal edges dividing one period of a reference clock, comparing a vernier clock signal edge to one of the plurality of phase-delayed clock signal edges after the phase-delayed clock signal edges have been autocalibrated, and adjusting the vernier clock signal edge to match the one phase-delayed clock signal edge so that the clock edge is calibrated and available for calibrated use by a user.

US Patent:

62659014, Jul 24, 2001

Filed:

Nov 24, 1999

Appl. No.:

9/448121

Inventors:

Kenneth J. Stern - Newton MA
Vincenzo DiTommaso - Arlington MA

Assignee:

Analog Devices, Inc. - Norwood MA

International Classification:

H03K 19086

US Classification:

326126

Abstract:

A high speed, multiple input restrictive OR circuit with fully differential inputs and output is used in applications in which only one input can be active at a time. N differential voltage inputs are converted into N corresponding differential current signals of unit current values. The current signals corresponding to active complement input signals are summed together, with a compensation current equal to (N-1) current units subtracted from the total. The resulting compensated complement currents together with any active input current form a single differential current that indicates the logic state at the input. This differential current is preferably converted to a buffered output differential voltage in an output stage. For high accuracy applications, a common unit reference current is used to generate both a scaled compensation current and unit input stage source currents.

US Patent:

62429590, Jun 5, 2001

Filed:

Dec 2, 1999

Appl. No.:

9/453148

Inventors:

Kenneth J. Stern - Newton MA

Assignee:

Analog Devices, Inc. - Norwood MA

International Classification:

H03H 1126

US Classification:

327262

Abstract:

One or more main programmed delay circuits (PDCs) are compensated to provide constant delays despite variations in environmental factors, such as temperature and power supply, by means of a dummy PDC that emulates the main PDCs in environmental sensitivity. While the main PDCs have dynamically changing programmed inputs, the dummy PDC has a constant programmed input. Changes in the dummy PDC's delay due to environmental changes are monitored and a correction signal is applied to the dummy PDC to maintain its delay substantially constant, with the same correction provided to the main PDCs to correct for the same changes in the delay of these circuits. The dummy PDC is preferably initially calibrated so that its fixed delay period coincides with an integer number of clock periods. Both the main and dummy PDCs preferably produce respective delays equal to the linear sum of a programmed delay and their correction delays.

US Patent:

20200226412, Jul 16, 2020

Filed:

Jan 11, 2019

Appl. No.:

16/245839

Inventors:

- FORNEBU, NO
Kenneth Jeffrey STERN - Newton Lower Falls MA, US

Assignee:

IDEX ASA - FORNEBU

International Classification:

G06K 9/62
G06K 9/00

Abstract:

Systems and methods for detecting a user's finger are provided. In some embodiments, a method may include applying a first electrical signal, applying a second signal, receiving a third electrical signal using a first electrode, receiving a fourth electrical signal using the first electrode, extracting the third and fourth electrical signals using a quadrature demodulator, and compensating for a phase delay between at least the first electrical signal and the third electrical signal.

US Patent:

20190220141, Jul 18, 2019

Filed:

Jan 12, 2018

Appl. No.:

15/869214

Inventors:

- FORNEBU, NO
Kenneth Jeffrey Stern - Newton Lower Falls MA, US
Imre Knausz - Fairport NY, US

Assignee:

IDEX ASA - FORNEBU

International Classification:

G06F 3/041
G06F 3/044

Abstract:

Systems and methods for reducing noise in sensors are described. In some embodiments, measurement values for selected pixels may be processed to remove signals that are common to groups of pixels. In some embodiments, offset values between pixel groups may be determined. In some embodiments, the determined offset values may be used to remove or suppress artificial discontinuities.