ROBERT S MARTIN
Nursing at Magazine St, Orlando, FL

2003017, Sep 25, 2003

Mar 19, 2003

10/391911

Robert Martin - Orlando FL, US

H03B001/00

327/112000

A driver circuit comprising has a pair of inputs, a pair of outputs, and multiple transistors, connected in a differential configuration, comprising a first set of transistors configured as a current mirror current source stage, a second set of transistors configured as a current source stage, and a third set of transistors configured as an emitter follower stage.

6469358, Oct 22, 2002

Sep 21, 2000

09/666847

Robert J. Martin - Orlando FL

Lockheed Martin Corporation - Bethesda MD

H01L 310304

257440, 257 21, 257184, 257448, 257459

Exemplary embodiments of the present invention use a vertically stacked quantum well infrared detector where each “tuned” quantum well of the detector can be biased separately from any other quantum well of the detector. The vertically stacked detector can include three or more quantum well layers that are “tuned” to different peak wavelengths to permit detection of infrared radiation of three or more different bands or colors. The simultaneous detection of infrared radiation in three or more different spectral bands permits the determination of more information about an infrared source.

5566382, Oct 15, 1996

Dec 11, 1995

8/570279

Terrance L. Worchesky - Columbia MD
Kenneth J. Ritter - Sykesville MD
Robert J. Martin - Orlando FL
Barry L. Lane - Seminole FL

Martin Marietta Corp. - King of Prussia PA

G02B 2600, G01S 1300

359237

A SAR radar has an optical processor which uses an electrical-signal-to-light modulator. The modulator includes a tapped delay line which may be either analog or digital, and the signals tapped from the delay line are applied to an array of temporary storage elements, which in the case of analog signals may be a capacitive sample-and-hold, or for digital signals may include storage registers. In order to improve the signal-to-noise ratio (SNR) by comparison with a processor using an acoustic modulator, the signals tapped from the delay line are sampled at a display sampling rate, which is very low by comparison with the signal sampling rate or the highest frequency of interest, and the sampled signals are held until the next following display rate pulse. The signals held in the temporary storage elements are applied to the modulator elements, so that the optical pattern remains fixed for relatively long periods of time during which the optical processing can integrate photons for improved SNR.

8115152, Feb 14, 2012

Jun 2, 2009

12/477049

Robert James Martin - Orlando FL, US

ADIC, Inc. - Longview FL

H03F 3/08

2502081, 250214 R, 250214 A

A photoconductor read out circuit includes a biasing signal generator connected to apply an alternating current biasing signal to a first terminal of the photoconductor. An input capacitance connected to a second terminal of the photoconductor stores charge applied to that terminal. A charge transfer amplifier included in the read out circuit receives a demodulating signal and functions to transfer charge to a summing node in response to the charge stored by the input capacitance and in coordination with the demodulating signal. A charge collection arrangement included in the read out circuit selectively resets the summing node to a base charge level, and stores charge applied to the summing node between resets to the base charge level. A sampling arrangement included in the read out circuit selectively applies a charge from the summing node to an output node, selectively presets the output node to a base output charge level, and stores charge applied to the output node between presets to the base output charge level. The charge stored at the output node between presets represents an output data signal from the read out circuit.

4709360, Nov 24, 1987

Nov 12, 1985

6/796909

Robert J. Martin - Orlando FL
Claude Sims - Orlando FL

Sparton Corporation - Jackson MI

H04R 1700

367157

An acoustic transducer, especially adapted for hydrophones, is disclosed. The transducer comprises a piezoelectric ceramic disk with a main or signal electrode, a common electrode and a feedback electrode; negative feedback is provided around an associated amplifier and the transducer. The transducer is useful in either a sonic receiver or a sonic transmitter. Various ceramic disk configurations are disclosed and several electrode configurations are disclosed. The negative feedback minimizes the undesired effects of the high Q characteristic of the piezoelectric ceramic transducer. The transducer exhibits improved frequency response characteristics including increased bandwidth and reduced resonance effects, fixed or linear phase shift over a broad range and improved transient response. Also, the effect of normal manufacturing variations upon sensitivity, frequency and phase response is minimized.

5629522, May 13, 1997

Jun 7, 1995

8/487682

Robert J. Martin - Orlando FL
Kirk Reiff - Titusville FL
Mark West - Oviedo FL
Gregory L. Milne - Casselberry FL
Kevin Brown - Orlando FL

Martin Marietta Corporation - Bethesda MD

H01L 2714, G01J 520

2503384

Apparatus for and method of increasing the effective integration time, and, hence, reducing the noise bandwidth of a photodetector. The current output of the photodetector is converted to a voltage signal in a low pass filter. The low pass filter is preferably implemented as a switched capacitor filter.

4977380, Dec 11, 1990

Dec 2, 1988

7/279043

Robert J. Martin - Orlando FL
Barry L. Lane - Longwood FL

Actran Systems, Inc. - Orlando FL

H03B 512, H03J 522, H04B 1100

331 74

The electronically tuned power oscillator (ETPO) of the present invention provides a method and apparatus that drives a narrow-band (high Q) transducer over a relatively broad band of frequencies. A pseudo-random sequence generator dynamically switches a bank of capacitors varying the resonant frequency of the power oscillator. A node on the power oscillator provides the clock for the pseudo-random sequence generator thereby providing a synchronized frequency change on every time varying cycle.