Robert H Maschhoff

6489845, Dec 3, 2002

Apr 4, 2000

09/542187

Robert Henry Maschhoff - Cedar Crest NM

Goodrich Corporation - Charlotte NC

H03F 500

330147, 330 69, 330252, 330 85, 330 86

A multiplexing amplifier has a differential amplifier for amplifying multiple input signals which are selected by a plurality input select circuits. The select circuits are comprised of longtail transistor pairs which are activated by current steering diodes controlled by input selection signals.

46929096, Sep 8, 1987

Jun 29, 1984

6/626491

Michael F. Gard - Catoosa OK
Ralph E. Warmack - Kingwood TX
Kyong H. Lee - Albuquerque NM
Robert H. Maschhoff - Cedar Crest NM

Amoco Corporation - Chicago IL

G01V 122
G01V 136

367 45

In portable seismic data acquisition units, an adaptive seismic signal processor and method for resampling and bandpassing selected frequencies of an input digital signal. The adaptive seismic signal processor and method provide an output digital signal having a frequency domain and resampling rate which can be selected from one of a plurality of predetermined frequency domains and sampling rates during the course of acquisition of the input digital signal without substantial loss or deterioration thereof.

47076739, Nov 17, 1987

Jun 10, 1986

6/872546

H. Lee; Kyong - Albuquerque NM
Robert H. Maschhoff - Cedar Crest NM

Gulton Industries, Inc - East Greenwich RI

H03H 748

333112

A directional coupler transformer insensitive to data bus termination failures, includes a ferrite toroid core about which first through fourth windings are wound, the first and second windings being for connection in series with each conductor, respectively, of a data bus for sensing or generating data signal current, the third winding being connected in parallel with the data bus conductors for sensing or generating data signal voltage, and a fourth winding inductively coupled to the other three windings for either coupling data signals traveling in one direction from the data bus to a receiving unit, or coupling data signals from a transmitting unit to the data bus for transmission along the data bus in a given direction.

52726274, Dec 21, 1993

Mar 27, 1991

7/676164

Robert Maschhoff - Cedar Crest NM
Kyong H. Lee - Albuquerque NM

Gulton Industries, Inc. - East Greenwich RI

G06F 1500

36441315

A data acquisition system employs data conversion circuitry well suited to large multisensor systems such as computerized tomography systems utilizing X-ray detectors. The data conversion system consists of a number of detectors or similar signal sources and a corresponding number of data registers and accumulation registers. Each data register contains a previous sample output of a signal source. Differential data conversion is employed such that the difference between the previous output and the current signal source output is added to the data register in order to update it to the current signal source output. Each signal source is repeatedly sampled and the samples accumulated in an accumulation register. The data conversion system thus provides increased system linearity, accuracy, and dynamic range, and yields improved measurement simultaneity of a large number of signal sources. These factors combine to result in substantial improvement in image resolution after suitable processing by a computer.