Lott; Robert D. - US Patent Attorneys and Agents

Attorney: Lott; Robert D.

Number of patents: 29
Last date: July 28, 2009

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Number	Title	Issue Date
7566931	Monolithically-integrated buck converter An integrated buck converter is formed on a substrate of a first polarity type and having a first and second substrate surface. An epitaxial layer is formed over the first substrate surface and has a first epitaxial layer surface. A drift region lightly-doped with d...	07/28/2009
7531888	Integrated latch-up free insulated gate bipolar transistor A lateral Insulated Gate Bipolar Transistor (LIGBT) includes a semiconductor substrate and an anode region in the semiconductor substrate. A cathode region of a first conductivity type in the substrate is laterally spaced from the anode region, and a cathode region ...	05/12/2009
7468314	Schottky diode structure to reduce capacitance and switching losses and method of making same A SiC Schottky barrier diode (SBD) is provided having a substrate and two or more epitaxial layers, including at least a thin, lightly doped N-type top epitaxial layer, and an N-type epitaxial layer on which the topmost epitaxial layer is disposed. Multiple epitaxia...	12/23/2008
5644257	Sampling circuit charge management The detrimental nonlinear charging currents from an analog input signal through an anti-aliasing filter into a sampling circuit can be minimized by using primary and secondary inputs to the sampling circuit. The secondary input is turned on before the pri...	07/01/1997
5608676	Current limited current reference for non-volatile memory sensing A non-volatile memo includes the reference cells programmed to opposite logic states whose outputs are combined and then equally divided to provide a reference signal to a sense amplifier which is one half of the sum of the signals from a high conductivit...	03/04/1997
5594442	Configuration programming of a digital audio serial port using no additional pins A stereo digital-to-analog converter is able to operate in an 8 pin package yet to operate under a variety of serial data input formats. The normal de-emphasis pin can be used for receiving a static de-emphasis signal, an external serial clock, or program...	01/14/1997
5590065	Digital decimation filter for delta sigma analog-to-digital conversion with reduced hardware compelexity A decimation filter includes a plurality of integration stages, at least one decimation stage, and a plurality of differentiation stages followed by a FIR filter. At least one of the integration stages, the decimation stage, and the differentiator stages,...	12/31/1996
5579247	Method and apparatus for decreasing the interference and noise sensitivity of a ratiometric converter type of circuit A ratiometric converter receives an external sense signal and external reference signal and provides an output signal which is proportional to the sense signal and inversely proportional to the reference signal. Electromagnetic interference and noise coup...	11/26/1996
5541599	Data independent loading of a reference in a discrete time system A 1-bit discrete time digital-to-analog converter which samples a reference voltage and ground potential onto two charging capacitors during a sample phase of each sampling period, and which transfers the charge on one of the capacitors, as determined by ...	07/30/1996
5528239	Low noise transmission of output data from a delta-sigma modulator The output gates of a delta-sigma modulator can generate i(t) transient signal in the power supply lines of a delta-sigma modulator. These i(t) spikes, which would otherwise produce non-linearities which can be coupled into the frequency band of interest ...	06/18/1996
5477481	Switched-capacitor integrator with chopper stabilization performed at the sampling rate A switched-capacitor integrator with chopper stabilization performed at the sampling rate virtually eliminates the flicker noise and any low frequency interference generated by the amplifier. The integrator samples the input and then passes the sampled in...	12/19/1995
5397944	Dense offset calibration circuitry and method An audio mixer circuit on an integrated circuit chip performs a calibration operation on power up which calibrates out most of the offset voltages of the operational amplifiers used in the mixer. The calibration logic includes a shared calibrate circuit w...	03/14/1995
5351050	Detent switching of summing node capacitors of a delta-sigma modulator The thermal noise generated through the feedback capacitor of a delta-sigma modulator is attenuated by transferring a reference voltage through the capacitor in two separate steps during each sampling period. This permits a reduction in the size of the fe...	09/27/1994
5319319	Low drift resistor structure for amplifiers A low drift integrated circuit resistor structure has a forced high end and a forced low end. A sense high connection is located proximate to the force high connection, and a sense low connection is located proximate to the force low connection. The struc...	06/07/1994
5276653	Fuse protection circuit A fuse protection circuit for an electrically programmable read only memory circuit consists of a fusing element such as an antifuse connected between a bitline and the drain of the access transistor, and which is susceptible to inadvertent activation due...	01/04/1994
5268651	Low drift resistor structure A low drift integrated circuit resistor structure has a forced high end and a forced low end. A sense high connection is located proximate to the force high connection, and a sense low connection is located proximate to the force low connection. The struc...	12/07/1993
5102073	Freestanding concrete pipe support A moveable, freestanding concrete pipe support suitable for use in arctic climates includes a concrete base which rests on a flat surface of the terrain. A metallic pipe support attached to the top of the base provides an interface between the concrete ba...	04/07/1992
4868793	Shared sub-array marine seismic source system Some of the laterally spaced air gun sub-arrays which are combined to form the sequentially fired source arrays of a marine prospecting system are shared between neighboring arrays. This double usage of said sub-arrays allows a larger number of full size ...	09/19/1989
4803667	Televiewer processing system Data received from a sonde in a borehole is enhanced by first measuring the relative travel time of a signal transmitted from the sonde and reflected from an area in the wall of a borehole. This measurement is repeated for a plurality of angles in a horiz...	02/07/1989
4803669	Three-component three-dimensional seismic data acquisition Three-component three-dimensional seismic data is acquired by locating a plurality of receivers off the seisimic shot line of a seismic source. The angle between the seismic shot line and a line extending between the seismic source and each receiver is us...	02/07/1989
4770269	Closed air system seismic wave generator Apparatus for generating seismic waves including an upstanding hollow cylindrical housing within which an impact piston latched in a cocked position is adapted to be propelled downwardly by high pressure expanding gas in the confined chamber above it with...	09/13/1988
4734381	Method of making a thin film cadmium telluride solar cell A phosphorous doped layer of cadmium telluride is deposited onto a conductive window layer to form a thin film cadmium telluride solar cell. Back contacts to the solar cell are made by first depositing a layer of p conductivity type lead telluride upon th...	03/29/1988
4650921	Thin film cadmium telluride solar cell A phosphorous doped layer of cadmium telluride is deposited onto a conductive window layer to form a thin film cadmium telluride solar cell. Back contacts to the solar cell are made by first depositing a layer of p conductivity type lead telluride upon th...	03/17/1987
4646274	Method and apparatus for correcting distorted seismic data Distortion in vibrator-type seismic records is corrected by measuring and using the actual ground force imparted by the source to develop an inverse filter. The ground force signal and the reflected seismic data are both subjected to the same deconvolutio...	02/24/1987
4133025	Pulse width modulator symmetry correction circuit and method thereof A transformer with a high permeability core is substantially prevented from saturating by a symmetry correction circuit which senses the total flux density change of either a positive or negative polarity and balances the total flux density change of the ...	01/02/1979
4132906	Circuit to improve rise time and/or reduce parasitic power supply spike current in bipolar transistor logic circuits An improvement in output rise time and a reduction in the parasitic power supply strike current is achieved in bipolar transistor logic circuits using an AC coupled feedback circuit. During the low to high transition of the output, an internal voltage is ...	01/02/1979
4102039	Method of packaging electronic components A carrier structure for electronic components which allows safe handling, testing, marking and shipment is fabricated as an integral part of the electronic component package. The carrier forms a square protective enclosure surrounding the electronic devic...	07/25/1978
4100431	Integrated injection logic to linear high impedance current interface An interface circuit for interconnecting an integrated injection logic (I2 L) portion of an integrated circuit to a linear portion of an integrated circuit. The circuit transfers both logic information and I2 L current level referenc...	07/11/1978
4081695	Base drive boost circuit for improved fall time in bipolar transistor logic circuits An improved fall time is achieved in bipolar transistor logic circuits which have three-state outputs. The circuits comprise a logic input terminal which is coupled to a push-pull output stage to drive a three-state output terminal. A three-state input re...	03/28/1978

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Attorney: Lott; Robert D.