Michael W Terry

US Patent:

6937906, Aug 30, 2005

Filed:

Jan 29, 2002

Appl. No.:

10/059599

Inventors:

Michael B. Terry - Gresham OR, US
James D. Reinke - Maple Grove MN, US
Ron Kalin - New Hope MN, US

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

A61N001/08

US Classification:

607 63

Abstract:

The present invention provides a method and apparatus for detecting magnetic fields in implantable medical devices. The apparatus includes a sensor adapted to provide at least one signal proportional to at least one vector component of a magnetic field. The apparatus further includes a circuit adapted to receive the signal and perform a predetermined action when a predetermined quantity exceeds a predetermined threshold value.

US Patent:

7623053, Nov 24, 2009

Filed:

Sep 26, 2007

Appl. No.:

11/861920

Inventors:

Michael B. Terry - Camas WA, US
Michael W. Heinks - New Brighton MN, US
Joel A. Anderson - Brooklyn Park MN, US
Mark A. Frigaard - New Brighton MN, US

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

H03M 1/66

US Classification:

341143, 341155

Abstract:

In general, this disclosure describes techniques for reducing power consumption within an implantable medical device (IMD). An IMD implanted within a patient may have finite power resources that are intended to last several years. To promote device longevity, sensing and therapy circuits of the IMD are designed to incorporate an analog-to-digital converter (ADC) that provides relatively high resolution output at a relatively low operation frequency, and does so with relatively low power consumption. An ADC designed in accordance with the techniques described herein utilizes a quantizer that has a lower resolution than a digital-to-analog converter (DAC) used for negative feedback. Such a configuration provides the benefits of higher resolution DAC feedback without having the use high oversampling ratios that result in high power consumption. Also, the techniques avoid the use of, and the associated high power consumption of, a high resolution flash ADC, within the sigma delta loop.

US Patent:

20220200448, Jun 23, 2022

Filed:

Dec 16, 2021

Appl. No.:

17/644735

Inventors:

- Minneapolis MN, US
Michael B. Terry - Camas WA, US
Emily Carroll - St. Paul MN, US

International Classification:

H02M 3/07
A61N 1/365

Abstract:

An example device includes a memory configured to store representations of sensed signals. The example device includes processing circuitry coupled to the memory, the processing circuitry being configured to read or write the representations of the sensed signals in the memory. The example device includes sensing circuitry coupled to the processing circuitry, the sensing circuitry being configured to sense signals indicative of a physiological condition of a patient via a plurality of electrodes and to output to the processor circuitry the representations of the sensed signals. The sensing circuitry includes a switched capacitor charge pump configured to amplify the sensed signals to generate amplified signals.

US Patent:

20160065133, Mar 3, 2016

Filed:

Sep 2, 2014

Appl. No.:

14/474858

Inventors:

- Minneapolis MN, US
Michael B. Terry - Camas WA, US

International Classification:

H03F 1/02
A61B 5/0476
A61B 5/0402
A61B 5/00
A61B 5/01
A61B 5/04
A61B 5/11
H03F 3/45
A61B 5/0488

Abstract:

In an example, an electrical circuit device for amplifying a physiological signal includes a modulation unit configured to receive an input signal, to modulate the input signal to produce a modulated signal. The device also includes an amplification and transconductance unit configured to amplify an amplitude of the modulated signal and increase a transconductance of the modulated signal to produce a transconductance enhanced modulated and amplified signal, where the amplification and transconductance unit comprises at least a first complementary pair of transistors and a second complementary pair of transistors configured to receive the modulated signal and to amplify and increase the transconductance of the modulated signal. The device also includes a demodulation unit configured to receive the transconductance enhanced modulated and amplified signal and to demodulate the signal.