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8797195 Smart synchro generator unit  
The present invention is typically embodied as a portable handheld unit that generates synchro signals for input into synchro motors and other synchro devices. A primary genre of inventive...
8775117 Encoder, servo unit, and method including calculating position data  
An encoder includes a detector, a first position data calculator, a first data converter, an approximation device and a third position data calculator. The first data converter is configured to...
8633667 Semiconductor integrated circuit device  
A motor speed determining circuit determining a rotation speed of a motor is provided and a processing of generating motor driving waveform is switched in accordance with the rotation speed of the...
8514110 Resolver digital converter  
This resolver digital converter 10 includes a band pass processing unit that is disposed between a conversion unit and a multiplication unit and passes only a signal of a predetermined band...
8514111 Hybrid digital-to-synchro converter unit  
A digital-to-synchro converter (“DSC”) is a device that converts digital signals to analog signals suitable for use by a synchro device. A conventional DSC implements complex circuitry to take...
8384570 Encoder interpolator with enhanced precision  
A method is presented for converting the sine/cosine signals from an optical encoder into a high-resolution position signal for use by a position control system while eliminating common noise and...
8332451 Programmable CORDIC Processor  
A CORDIC processor has a plurality of stages, each of the stages having a X input, Y input, a sign input, a sign output, an X output, a Y output, a mode control input having a ROTATE or VECTOR...
8274414 Signal amplitude adjustment to improve resolver-to-digital converter performance  
An interface system between an RDC and a connected resolver dynamically matches an input range of the RDC to the output range of the resolver's output signals. The interface system may include...
8237599 Analog-to-digital converter in a motor control device  
System and method for digitizing analog voltage signals. A first voltage signal may be received at a comparator. A ramp signal may be received at the comparator. The ramp signal may be generated...
8228217 Filter for the suppression of noise in resolver-to-digital converters  
A system and method for reducing noise in resolver-to-digital converters (RDC) using a cascaded tracking loop filter. In some embodiments, one or more tracking loop filters may be implemented in a...
8193955 Modular units for synchro-to-digital conversion and digital-to-synchro conversion  
The inventive data conversion device is typically embodied as a modular unit including a PCBA and a frame that houses it. The PCBA includes a PCB and electronic components mounted thereon...
8188896 Digital converter for processing resolver signal  
According to one embodiment, a digital converter is provided to process output signals of a resolver attached to a rotating apparatus. These output signals are converted into digital signals by ΔΣ...
8159173 Control device for controlling travel motor of vehicle  
A control device for a travel motor mounted to a vehicle has a resolver which works as a rotation-angle sensor. The control device has a RDC which calculates a rotation-angle output value φ based...
8058833 Fine resolution motor control  
Methods and apparatus are provided for deriving precision position and rate information for motors using relatively low precision analog sensors, and for implementing compensation techniques that...
8004276 Reference signal generation circuit, angle converter, and angle detection apparatus  
A reference signal generation circuit generates a reference signal used in synchronous detection for removing an excitation signal component in an angle calculation section that converts a...
7864075 Rotary electrostatic encoder  
A rotary electrostatic encoder comprising a disk-shaped fixed plate having a first transmission electrode, a second transmission electrode, and four reception electrodes; a disk-shaped rotating...
7817070 Method and apparatus for sampling and converting a signal  
A signal conditioning circuit time share multiplexes anti-aliasing filters and an A/D converter. A plurality of first tier multiplexers each time share multiplex one of a plurality of antialiasing...
7773008 ***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Method and apparatus for sampling and converting a signal
 
A signal conditioning circuit time share multiplexes anti-aliasing filters and an A/D converter. A plurality of first tier multiplexers each time share multiplex one of a plurality of antialiasing...
7768431 R/D converter and angle detecting apparatus  
A band elimination filter 35 that eliminates or reduces a low frequency noise superposed on resolver signals S1 and S2 is provided between a synchronous detection circuit 34 that performs...
7692566 Angle detection device  
A resolver includes an excitation signal generator which generates a sine wave and a cosine wave as an excitation signal, a rotor which receives the excitation signal, and a rotary transformer...
7663520 A/D conversion apparatus  
An A/D conversion apparatus performs motor current detection in an A/D conversion period corresponding to two phases out of three phases of a sinusoidal drive motor, using reduced register...
7652602 Signal interface circuit  
Interface unit for voltage input signals comprising two or more input channels. The input signals of these two or more input channels are connected alternately by an analog multiplexer to an...
7549916 Cabin pressure control system and method that implements high-speed sampling and averaging techniques to compute cabin pressure rate of change  
An aircraft cabin pressure control system and the method implement a technique that oversamples and filters a sensed cabin pressure signal, and then differentiates the oversampled and filtered...
7541951 Tracking loop type digital angle converter and angle/digital converting apparatus  
A tracking loop type digital angle converter that operates so that a deviation between input and output angles always becomes zero by feeding back the output angle to the input angle, wherein in...
7538700 Angular position detector and rotary electric device drive unit including the same  
The invention provides an angular position detector that can be configured at low cost and that accurately detects the angular position of a rotor in a rotary electric device and permits reliable...
7535382 High speed quadrature counter  
A high speed quadrature counter for use with a displacement measuring device is disclosed. The counter provides high speed counting by partitioning the tracking counter into a small fast tracking...
7535982 Method and apparatus for adjusting phase of sampling frequency of ADC  
A method for adjusting a phase of a sampling frequency of ADC is disclosed. The method includes converting an analog signal into a first digital signal according to a first phase of the sampling...
7496462 Encoding signal processing device and signal processing method therefor  
An encoder signal processing device comprising an A/D converter converting a periodic analog signal, a memory storing position detection error information and a computing unit including a position...
7489260 Resolver hall decoding circuit  
A device for converting position data to Hall code data includes a data input for providing the position data, a data output for providing the Hall code data, a first adder circuit operative to...
7456603 Phase detection circuit, resolver/digital converter using the circuit, and control system using the converter  
A small-sized and low-cost phase detection circuit which has improved noise immunity. The phase detection circuit comprises a multiplier for multiplying an input signal by a reference signal and...
7432836 Multiplexed signal conditioner  
A signal conditioning circuit time share multiplexes anti-aliasing filters and an A/D converter. A plurality of first tier multiplexers each time share multiplex one of a plurality of antialiasing...
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,...
7382295 Control unit for electric power steering apparatus  
Since an abnormality is judged by executing a square calculating process with respect to sin θ and cos θ for detecting an abnormality in an angular resolver, a processing time is elongated, and a...
7352305 Method and circuit for interpolating encoder output  
Two-phase sinusoidal signals QA, QB output from an encoder are interpolated by sample-and-hold (S/H) circuits and A/D conversion (ADC) circuits, and data D is output in accordance with a data...
7352304 Interpolation apparatus in encoder  
An interpolation apparatus in an encoder includes an analog-to-digital converter for digitizing a sine wave signal and a cosine wave signal, respectively. An amplitude level detecting circuit...
7321113 Precision material-handling robot employing high-resolution, compact absolute encoder  
An absolute encoder employs multiple sub-encoders of different resolutions and a linking algorithm for combining the sub-encoder outputs to form an accurate, high-resolution position estimate. The...
7253395 Absolute encoder employing concatenated, multi-bit, interpolated sub-encoders  
An absolute encoder employs multiple sub-encoders of different resolutions and a linking algorithm for combining the sub-encoder outputs to form an accurate, high-resolution position estimate. The...
7205916 Digital method and apparatus for resolving shaft position  
An apparatus and method for determining an angular position of a shaft are disclosed, which comprise resolving an excitation signal at an excitation frequency into at least two orthogonal signals,...
7199727 Electrostatic encoder and electrostatic displacement measuring method  
An electrostatic encoder comprises a movable element having electrodes and a stator having induction electrodes and potential detection electrodes. The electrostatic encoder further comprises a...
7196643 Resolver arrangement  
A resolver arrangement that is inexpensive and yet offers high resolution and high noise rejection includes a carrier signal generator and two processing channels each of which has an analog input...
7194394 Method and apparatus for detecting and correcting inaccuracies in curve-fitted models  
A technique for detecting and correcting inaccuracies in curve-fitted models. Humps and dips in a curve-fitted model are identified. An analysis is performed on the humps and dips to determine if...
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...
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...
7119717 Encoder output divider and R/D converter  
A Resolver/Digital (R/D) converter includes an encoder output divider having a DSP generating 14-bit encoded signals A2 and B2 from a timing analysis performed during the first period of 12-bit...
7064692 Solid-state synchro/resolver converter  
Methods and systems for simply and inexpensive converting the signals of solid-state sensors for use by analog systems and indicators. An embodiment of the system receives a DC voltage value from...
7046176 Rotary encoder  
A rotary type encoder is provided with a signal generating portion 2 for generating a sine wave signal of N periods for each revolution in accordance with the rotation of the shaft 4 of a motor; a...
7047145 Compensation method of resolver detected position  
A resolver detected position compensation system for a resolver is provided that can enhance a position detection precision by performing a further compensation on a compensated position that was...
7015840 Resolver/digital converter  
An R/D converter allows high precision detection of a rotation angle of a rotor axis of a resolver having high rates of rotation. An A/D converter is built into a digital signal processor and...
7012397 Encoder and control apparatus for motor  
In a control apparatus, a “characteristic value calculation” block calculates a characteristic value (such as amplitude value, offset value, or waveform distortion for each phase of two-phase...
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...

Matches 1 - 50 out of 284 1 2 3 4 5 6 >