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| Number | Title | Issue Date |
| 7432837 | System and method for correcting DC offset A system for correcting a DC offset includes a digital-to-analog (D/A) converter module (30), a summing circuit (40), an inphase-to-quadrature (I/Q) modulator (50), a spectrum analyzer module (60) and a DC offset correction module (70 | 10/07/2008 |
| 7417571 | Method for providing a correlation A method for providing a correlation between a periodic analog/digital conversion and an angle-synchronous signal, in which the periodic analog/digital conversion is provided with a timing mark, which correlates with the angle-synchronous signal, and is assigned to ... | 08/26/2008 |
| 7391347 | Radio receiver, system on a chip integrated circuit and methods for use therewith A system on a chip integrated circuit includes a first digital module a second digital module such that the first digital module and the second digital module are operably coupled to generate an output signal based on an input signal, based on the first digital cloc... | 06/24/2008 |
| 7388528 | Coding method and device for determining absolute angular position Method for coding at least one datum using three digital signals A, B, C delivered on respectively one channel, in which the third signal C is delivered by a combination of the first two signals A, B in order to form m binary triplets, where m | 06/17/2008 |
| 7365661 | Power converter circuitry and method A control system and method for simultaneously regulating the operation of a plurality of different types of switching power converters. The system utilizes in regulating the power converters sampled data and nonlinear feedback control loops. ... | 04/29/2008 |
| 7348910 | Reference module apparatus and method therefor A Root Mean Square (RMS) detector circuit includes a first differential pair circuit arranged to operate in a common mode. The detector circuit also includes a compensation circuit unit having a second differential pair circuit to duplicate an unwanted base current ... | 03/25/2008 |
| 7289051 | Digital-to-analog converters including charge pumps and related automatic laser power control devices and methods A digital-to-analog converter may include a clock signal generator and a charge pump. The clock signal generator may be configured to generate an information clock signal responsive to a digital input signal so that different duty cycles of the information clock sig... | 10/30/2007 |
| 7277906 | Method for determining an output value having a lowest error value from an input value The present invention teaches a method for generating an output value corresponding to an input value via a first function comprising a first section and a second section with the use of a lookup table, comprising: prestoring a plurality of first sampling points cor... | 10/02/2007 |
| 7268710 | Logic device for the transformation of the output of the RDC into series A-B pulses A logic device for the transformation of the output of the RDC into series A-B pulses according to the present invention comprises: a chip with its two minimal bits (LSB-LSB-1) simulating as the clock source of A-B pulses, a signal-processing pin (BUSY) which... | 09/11/2007 |
| 7268573 | Apparatus for generating test stimulus signal having current regardless of internal impedance changes of device under test An apparatus for generating a current source test stimulus signal having a constant current regardless of an internal impedance value of a device under test includes a voltage source generation unit and a voltage to current (V/I) converter. The voltage source genera... | 09/11/2007 |
| 7260592 | Addressing mode and/or instruction for providing sine and cosine value pairs The present invention relates to a method and system for providing sine and cosine value pairs in a processor. The method includes decoding a sine and cosine instruction having a predetermined source angle and generating an index value for a sine cosine table (SCT) ... | 08/21/2007 |
| 7197589 | System and method for providing access to a bus A computer system (10) includes a bus controller (12), a bus (14), a plurality of processing devices (16) and a plurality of enabling switches (18). Each enabling switch (18) corresponds to a separate one of the processing d... | 03/27/2007 |
| 7196537 | Integrated circuit An integrated circuit includes a circuit component, a first control circuit and a switchable resistance network. An input voltage is fed to the circuit component on the input side. A control signal generated by the first control circuit is fed to the control termina... | 03/27/2007 |
| 7187309 | Angle computation method and apparatus for variable reluctance resolver In an angle computation method and apparatus for a variable reluctance resolver, the maximum values Vsin(max) and Vcos(max) of sine and cosine output voltages in respective positive value ranges and the minimum values Vsin(min) and V... | 03/06/2007 |
| 7177348 | Multipath receiver of a spread spectrum communication system with dynamic matched filter and efficient signal combiner A receiver for detecting, tracking and combining multipath components spanned over several symbol periods employs signal register arrays, a reference signal generator, matched filters, a signal combiner, and a decision circuit. The signal register arrays cascade for... | 02/13/2007 |
| 7126514 | Inverter control device and inverter control method An inverter control microcomputer 10 comprises AD converters 21–23, a selector control circuit 31, and a selector 32. The selector 32 selects three analog signals from among inputted seven analog signals in accordance with contro... | 10/24/2006 |
| 7084790 | Device to effectuate a digital estimate of a periodic electric signal, related method and control system for an electric motor which comprises said device A device for effectuating a digital estimate of a periodic electric signal is described. The device comprising a linear DAC having an output signal, a comparator that compares the output signal of the linear DAC with the periodic electric signal, and logic circuitry... | 08/01/2006 |
| 7046177 | Servo system, apparatus comprising a servo system, sigma delta modulator, and integrated circuit comprising a sigma delta modulator A servo system comprising an analog sigma delta modulator for generating a normalized digital error correction signal from first and second analog control signals. The sigma delta modulator comprises an analog low-pass filter, a quantizer delivering the digital erro... | 05/16/2006 |
| 7012399 | Position detector correction method and electrically-powered steering apparatus This invention provides an electrically-powered steering apparatus capable of assisting a steering torque appropriately using a resolver. A reference signal is applied to a resolver arithmetic processing I/F circuit 34 and a resolver arithmetic processing I/F... | 03/14/2006 |
| 7007052 | Efficient real-time computation Systems and methods for determining coefficients a filter are disclosed. The filter coefficients are computed by determining a sine of an input value and an inverse of the input value. The sine of the input signal and the inverse of the input signal are multiplied t... | 02/28/2006 |
| 6943713 | Process and device for the sequential addressing of the inputs of a multiplexer of a data acquisition circuit The systematic, and possibly repeated, acquisition of several distinct quantities for exploitation by a user system by utilizing a multiplexer with staged architecture without all inputs hard-wired. Each multiplexer stage is addressed by an elementary counter chaine... | 09/13/2005 |
| 6911925 | Linearity compensation by harmonic cancellation A linearity compensation circuit provides cancellation of harmonic distortion introduced by a non-linear system into an input signal by providing a separate harmonic correction component for each harmonic of a fundamental frequency of the input signal. The harmonic ... | 06/28/2005 |
| 6894629 | Resolver/digital converter An A/D converter converts a sine and cosine wave output of a resolver to form a digital sine and cosine. A microcomputer uses an absolute value of digital sin θ as an address to retrieve θ from a memory containing angle values between 0° and 90°, if the absolute... | 05/17/2005 |
| 6778922 | Decoder for three phase signal A heading and Omni-Bearing Selector (OBS) module for converting 3-phase analog heading signals input from a heading synchronic device and analog sine and cosine bearing signals input from an OBS resolver device. ... | 08/17/2004 |
| 6429838 | Correlation modulating apparatus A correlation modulating apparatus that is adapted to modulate high frequency data into low frequency signals. In the apparatus, a register lists in parallel a data bit stream by at least two bit using a key clock having less frequency than a data clock. ... | 08/06/2002 |
| 6172627 | Dynamic digital to synchro converter A digital to synchro converter converts digital values to an analog synchro signal. The values are mapped in a memory and sent to a digital to analog converter converting the digital values to analog values. Sample and hold circuitry is then used to creat... | 01/09/2001 |
| 5926122 | Electronic circuit and method for simulating mechanical quadrature encoders An electronic encoder circuit and method for providing a set of quadrature waveforms whose frequency is related to the amplitude of an analog input signal. Broadly stated, the electronic encoder circuit comprises conversion circuitry that generates a digi... | 07/20/1999 |
| 5774082 | Digital phase to digital sine and cosine amplitude translator A digital phase to digital sine and cosine amplitude translator generates sine and cosine outputs from an input angle word, which is decomposed into the most significant bits (MSBs) and the least significant bits (LSBs), and the octant number of the angle... | 06/30/1998 |
| 5644310 | Integrated audio decoder system and method of operation A data processing system (10) is disclosed which comprises a microprocessor host (12) coupled to a decoding system (14). A host interface block (18) receives a bit stream and passes bit stream on to a system decoder block (20). The system decoder block (2... | 07/01/1997 |
| 5451945 | Multi-speed multi-phase resolver converter A multiphase converter circuit generates a plurality of sinusoidal outputs of displaced phase and given speed value from the output of an angular resolver system attachable to a motor excited by these multi-phase outputs, the resolver system having a lowe... | 09/19/1995 |
| 5237324 | System and method for producing baseband analog modulation signals A system provides I and Q baseband analog modulation signals for use in GMSK modulation responsive to serial bits of digital data. The I baseband modulation signal is represented by I(t)=cos [2πfm Þb;g(t)dt] and the Q baseband modulation s... | 08/17/1993 |
| 5173696 | Control circuitry using electronic emulation of a synchro signal for accurate control of position and rate of rotation for shafts The invention herein disclosed is a digital circuit which emulates a synchro signal in a synchro-resolver follower system for precise control of shaft position and rotation at very low rotational rates. The subject invention replaces the synchro and drive... | 12/22/1992 |
| 5039987 | Circuit for converting a phase signal to an amplitude signal A circuit for converting a phase signal to an amplitude signal comprises a signal separating circuit which receives a phase signal and provides in accordance therewith a phase conversion signal and a sign signal, and a conversion unit including a conversi... | 08/13/1991 |
| 5007016 | Fractal-type periodic temporal signal generator A signal generator generates a temporal signal with a periodic configuration defined by an arrangement of seed patterns resulting from a branching construction iteratively using laws for composing several patterns and consisting in defining the periodic c... | 04/09/1991 |
| 4947167 | Apparatus for generating synchro/resolver stimulus signals Apparatus for generating synchro/resolver stimulus signals is disclosed wherein the stimulus signals are generated in an arbitrary time sequence of synchro/resolver shaft angles under control of an external computer. Data from the computer is applied to r... | 08/07/1990 |
| 4906909 | Analog electronic control differential transmitter A linear, analog, synchro control differential transmitter for implementing he common synchro CDX function whereby a scaled linear analog voltage is used as input instead of a mechanical shaft angular displacement. Alternate synchro functions of CT and CX ... | 03/06/1990 |
| 4890057 | Instrument with crossed-coil type movable magnet An instrument with cross-coil type movable magnet which performs desired indication by A-D converting in accordance with the state of an object under measurement and applying to the crossed coils the current corresponding to a digital value after A-D conv... | 12/26/1989 |
| 4703307 | Synchro/resolver shaft angle converter apparatus Apparatus is disclosed which is controlled via computer interface logic for converting digital signals corresponding to predetermined synchro/resolver shaft angles into analog signals for stimulus purposes, and for converting the analog signals into digit... | 10/27/1987 |
| 4682149 | High resolution pipelined digital-to-analog converter A high resolution pipelined digital-to-analog converter is disclosed having at least one switching circuit for conveying charge to at least one conversion capacitor upon receipt of a digital signal during the first half of a clock cycle. Additional switch... | 07/21/1987 |
| 4667138 | Multiplexed synchro driver An improved drive control circuit is disclosed for enabling the multiplexed drive of synchro receivers. A zero crossing detector is coupled to sense the zero crossings of a signal driving the excitation winding of a synchro receiver. A counter coupled to ... | 05/19/1987 |
