1
David B Swedlow, Michael J Bernstein, Charles E Porges, James E Luecke, Michael W Nootbaar: Medical diagnostic apparatus with sleep mode. Nellcor Puritan Bennett Incorporated, Townsend and Townsend and Crew, July 20, 1999: US05924979 (253 worldwide citation)

A method and apparatus for conserving power in a medical diagnostic apparatus by using a sleep mode during a monitoring state. The sleep mode allows not only the processor to be put to sleep, but other detection circuitry as well. This is accomplished by not relying on detecting events to awaken the ...


2
David B Swedlow, Michael J Bernstein, Charles E Porges, James E Luecke, Michael W Nootbaar: Medical diagnostic apparatus with sleep mode. Nellcor Puritan Bennett Incorporated, Townsend and Townsend & Crew, May 5, 1998: US05746697 (249 worldwide citation)

A method and apparatus for conserving power in a medical diagnostic apparatus by using a sleep mode during a monitoring state. The invention monitors physiological parameters of the patient and enters a sleep mode only after they have been stable for a predetermined period of time. The apparatus is ...


3
Robert Stephen Potratz, Michael W Nootbaar: Pulse oximeter with sigma-delta converter. Nellcor Puritan Bennett, Hovey Williams Timmons & Collins, July 13, 1999: US05921921 (170 worldwide citation)

A preferred oximeter detects the transillumination by red and infrared light of a portion of an in vivo subject and produces analog signals representative thereof on two channels. Sigma-delta modulators sample the analog signals on each channel. A digital filter processor digitally filters the sampl ...


4
Gerald R Newell, Michael W Nootbaar, Pradeep Bhardwaj: Linear crystal oscillator with amplitude control and crosstalk cancellation. New SD, Flehr Hohbach Test Albritton & Herbert, September 10, 1991: US05047734 (14 worldwide citation)

A series-feedback crystal oscillator has a crystal element in series with a buffer amplifier. The oscillator maintains a linear oscillation signal by using an amplitude control circuit to hold the oscillation signal to a certain level at which distortion, clipping, or saturation does not occur. A co ...


5
Michael W Nootbaar, Gerald R Newell: Capacitive position detector. New SD, Flehr Hohbach Test Albritton & Herbert, June 16, 1992: US05122755 (13 worldwide citation)

A differential capacitive pickoff detector circuit for measuring the difference in spacing of a pair of differential pickoff capacitor plates. Current sources are provided for each output terminal of each of the pair of differential capacitors so that for each capacitor output terminal a current sig ...


6
Gerald R Newell, Michael W Nootbaar, Pradeep Bhardwaj, Robert C Willson: Crystal oscillator and method with amplitude and phase control. New SD, Flehr Hohbach Test Albritton & Herbert, February 9, 1993: US05185585 (11 worldwide citation)

Crystal oscillator and method which in one embodiment have a crystal element connected in a positive feedback loop with a charge amplifier and an integrator, with the gain of the loop being maintained at a level of unity. Compensation is provided to offset the effects of shunt capacitance in the cry ...



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