Walter S Czarnocki

7107854, Sep 19, 2006

Mar 10, 2005

11/078974

Walter Czarnocki - Hoffman Estates IL, US

Motorola, Inc. - Schaumburg IL

G01L 13/02
G01L 13/06

73720, 73721

A method and media-isolated absolute pressure sensor apparatus includes a first sensor () to measure a pressure difference between an isolated media (P) and a second media (Pa). A second sensor () measures an absolute (relative to vacuum) pressure of the second media (Pa). Each sensor () has its own offset and slope response. An equalizer () matches the slopes of the sensors (), wherein a summing circuit () can add the substantially same slope outputs to provide an output signal () indicative of an absolute pressure measurement of the isolated media (P). Offset and temperature compensation of each sensor can also be provided.

50270150, Jun 25, 1991

Sep 14, 1989

7/407396

Walter Czarnocki - Schaumburg IL

Motorola, Inc. - Schaumburg IL

G06G 710
H03K 326

307491

Pressure sensor circuit (12) develops an input sensor signal (V01) varying linearly as a function of sensed pressure (P) over a range (P. sub. 1) of pressure. An error reduction circuit (14-21, R10-R14) having operational amplifiers (16, 19) and a semiconductor device (21) receives the input sensor signal and provides an output signal (V. sub. OUT). The output signal varies at a first high constant rate during a first portion (P. sub. 2) of the pressure range and at a lower constant rate during a second portion (P. sub. 3) of the pressure range. A break point (BP) between the first and second pressure range portions occurs when the input sensor signal magnitude exceeds a voltage level (V. sub. T) magnitude. The rate of change of the output signal during the first pressure range portion exceeds the rate of change of the input sensor signal during this same pressure range and thus the percentage of error of the output signal is less during the first pressure range portion than the percentage of error of the input sensor signal.

57449686, Apr 28, 1998

Apr 30, 1996

8/641453

Walter S. Czarnocki - Hoffman Estates IL
Thomas J. Walczak - Woodstock IL

Motorola Inc. - Schaumburg IL

G01R 2506

324608

A ratiometric circuit (40) includes a differential capacitive sensor (42) for sensing a change in capacitance, a differential capacitive detector (46) operatively connected to the differential capacitive sensor for detecting a change in the capacitance of the differential capacitve sensor, an error voltage generator (48) operatively connected to the differential capacitve detector for generating a corrective voltage in response to the detected change in capacitance, and a bias circuit (50) operatively connected to the differential capacitive sensor for generating a bias voltage inversely proportional to and independent of a supply voltage for maintaining the ratiometricity between an output voltage of the differential capacitive sensor and the supply voltage.

61420212, Nov 7, 2000

Aug 21, 1998

9/137765

Carl Ross - Mundelein IL
Walter Czarnocki - Hoffman Estates IL
John Schuster - Grayslake IL
Xiaoyi Ding - Lake Zurich IL

Motorola, Inc. - Schaumburg IL

G01L 906

73727

A sensor (10) includes a plurality of sensing elements (14-20) deposed on a sensor substrate (12) and an electronic switching circuit (22) electrically connected to each of the sensing elements (14-20) for electrically selecting at least one of the sensing elements (14-20).

54718848, Dec 5, 1995

Jul 5, 1994

8/270552

Walter Czarnocki - Hoffman Estates IL
William Rathke - Arlington Heights IL

Motorola, Inc. - Schaumburg IL

G01L 1302
G01L 1306

73720

A media-isolated differential pressure sensor apparatus and corresponding method combines a first signal (207, 209) provided by a first pressure sensor (101), indicative of a difference between a first pressure and second pressure applied across the first pressure sensor, and a second signal (213, 215) provided by a second pressure sensor, indicative of a difference between the second pressure and a third pressure applied across the second pressure sensor (103) to form a differential pressure sensor. Responsive to a pressure span the first signal (207, 209) responds with a slope response different than a slope response of the second signal (213, 215). A slope adjustment circuit (217) enables an adjustment of the slope response of the first signal (207, 209) to correspond to the slope response of the second signal (213, 215), and provides a slope adjusted first signal (221) dependent on the adjusted slope response. A difference circuit (225) provides an output signal (227) dependent on a difference between the slope adjusted first signal (221) and the second signal (223), where the output signal (227) is indicative of a pressure differential sensed between the first pressure sensor (101) and the second pressure sensor (103).

49470574, Aug 7, 1990

May 1, 1989

7/345815

Walter S. Czarnocki - Schaumburg IL
Peter W. Harper - Crystal Lake IL
Kevin S. Moran - Algonquin IL
Steven W. Alexander - Schaumburg IL

Motorola, Inc. - Schaumburg IL

H01L 2716

307310

A mass fluid flow sensor is disclosed which utilizes a sensing bridge circuit to develop a sense (control) signal related to fluid flow. A fluid temperature variable resistor, separate from said bridge circuit, is utilized to implement temperature compensation so that a desired output signal is a function of sensed fluid flow, but is less dependent on fluid temperature than the sense (control) signal provided by the bridge circuit. A resistor in the bridge circuit is selected such that the sense (control) signal provided by the bridge circuit has a rate of change as a function of flow rate substantially independent of fluid temperature, but this sense signal still varies as a function of fluid temperature. This permits fluid temperature compensation of the bridge sense signal in a noncomplex and cost effective manner. An improved adjustable circuit (36-41) is provided for producing a desired temperature variable output signal (V. sub. os).

58699988, Feb 9, 1999

Dec 10, 1996

8/763575

Walter Czarnocki - Hoffman Estates IL

Motorola Inc. - Schaumburg IL

H03F 134

330107

An amplifier circuit (20) having independent gain and response time adjustments includes an amplifier (22), a response time resistor (30), a variable gain resistor (32) attached to the response time resistor and to an output of the amplifier (22), a response time capacitor (34) connected in parallel to the response time resistor (30), an anti-gain resistor (36) connected to a response time (30) and variable gain resistor (32) and to ground, and an input resistor (38) connected to the response time resistor (30) and to in input terminal of the amplifier (22). The response time resistor has a substantially greater resistance value than a resistance value of the variable gain resistor (32) for allowing a gain adjustment of the amplifier circuit (20) without changing the response time of the amplifier (22).

59396938, Aug 17, 1999

Feb 2, 1998

9/017463

William Roeckner - Carpentersville IL
Timothy Rueger - Austin TX
Walter Czarnocki - Hoffman Estates IL

Motorola Inc. - Schaumburg IL

G06F 1110

235 61P

A polynomial calculator device is applied to calibrate a sensing device. Preferably the sensing device (100) includes a sensing element (102) with an output coupled to a signal conditioning circuit (104). The signal conditioning circuit (104) is adapted to be highly computationally efficient and operable for compensating for temperature and part-to-part variation on the sensing element output for providing a useable sensor output signal. A calibration method relies on a unique polynomial calculator (118) that is implemented as part of the signal conditioning circuit (104). The sensor is preferably manufactured and packaged prior to calibration so as to avoid any post-calibration processing error. The packaged sensor is calibrated and a number of calibration values are retained in a memory (114) and accessed by the calibration method during sensing element signal processing.