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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...
7477174 Method for digital sampling and corresponding implementation device  
A method for cadence detection in a sequence of video fields is based on at least a search for cadence patterns in a sequence of bits representative of the motion in at least a part of the field...
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...
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...
7289048 Duo-binary encoder and optical duo-binary transmission apparatus using the same  
A duo-binary encoder performs a parallel processing and an optical duo-binary transmission apparatus using the encoder to enhance transmission capability. The duo-binary encoder has a judgment unit...
7265693 Method and apparatus for detecting position of movable device  
A method and apparatus for detecting the position of a movable device are provided, in which an acceleration signal of the movable device is obtained and the acceleration signal is converted to a...
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,...
7193539 Precoder and optical duo-binary transmission apparatus using the same  
A precoder for an optical duo-binary transmission apparatus disposing the precoder before a time division multiplexer includes a judgment unit for judging whether an odd number or even number of...
7154495 Analog interface structures and methods for digital displays  
Structures and methods are provided for generating a digital display signal from an analog signal that is limited to 2 N discrete analog levels and from a synchronization signal that defines...
7123175 Angle detection apparatus computing phase differences between first and second phase angles  
A resolver use angle detection IC subjected to a phase lock operation so as to follow not an angle θ(t) for detection, but a phase angle ωot±θ(t) having an offset of a frequency ωot in the...
7100067 Data transmission error reduction via automatic data sampling timing adjustment  
A data transmission error reduction circuit is formed including a delay circuit, a detection circuit and a control circuit. In one embodiment, the delay circuit includes n delay element and...
7069209 Techniques for quantization of spectral data in transcoding  
A transcoder reduces excess requantization error in quantization of spectral data. The transcoder phase shifts data decompressed by a decompressor. The phase shifting causes a change to...
7061411 Device and method for enhancing resolution of digital encoder  
The present invention provides a device and a method for enhancing the resolution of the digital signal of a digital encoder. The device comprises a digital encoder which outputs a fundamental...
7019672 Position sensor  
A low cost x-y digitising system is described for use in consumer electronic devices, such as portable digital assistants, mobile telephones, web browsers and the like. The digitizer includes a...
6996482 Device and method for determining the position of a rotor  
The invention relates to a device and a method for determining an electrical starting rotor angle of an electromotor. According to the invention, the electromotor ( 10 ) is subjected to an...
6980134 Signal processing apparatus and method  
Processing circuitry is provided for processing signals received from, for example, sense coils forming part of a position encoder used to encode the relative positions of two relatively movable...
6954158 Process for automatically generating several electrical pulses using numeric default values, in particular for simulating an incremental encoder  
The invention relates to a method for automatically generating several electrical pulses using numeric default values, in particular for simulating an incremental encoder for a sequential, digital...
6952175 Phase digitizer for signals in imperfect quadrature  
A method of digitizing first and second signals in imperfect quadrature for obtaining characteristic parameters of the first signal comprises providing a first signal, the first signal comprising...
6891492 Method of converting an analog signal into a digital signal  
To enhance analog to digital conversion performance by obtaining a digital angle output using a negative feedback system including a resolver within a closed loop. The present invention provides a...
6885322 Apparatus and method for transmitter phase shift compensation  
A transmitter circuit ( 10 ) includes a phase shifter ( 20 ) that receives phase shift compensation and timing data ( 40 ), and an amplifier ( 30 ) that receives a control signal ( 70 ) to initiate...
6879274 Signal-conditioning and analog-to-digital conversion circuit architecture  
An analog-to-digital metering circuit includes a first programmable gain amplifier to amplify a first voltage signal from a first channel before being received by a first analog-to-digital...
6868377 Multiband phase-vocoder for the modification of audio or speech signals  
A method and apparatus to inexpensively and efficiently process audio and speech signals. A method for processing a signal having at least one region of interest is provided. The method begins by...
6822588 Pulse width modulation systems and methods  
Pulse width modulation systems and methods are described. In one aspect, a pulse width modulation system includes a register and a code word generator. The code word generator has an input for...
6822596 Analog/digital converter that employs phase comparison  
An analog/digital converter includes a first transfer circuit which receives an input voltage and outputs an output clock signal having a phase delay that is dependent on the input voltage, a...
6778112 Adaptive decoding method and apparatus for frequency shift key signals  
A adaptive deciding method and apparatus for frequency shift key signals are provided to sample the demodulated FSK signal, input the values of the sample points in sequence to a sample group, and...
6741199 Arrangement and process for interpolating a measured signal  
An arrangement for interpolating signals interpolates an analog measured signal which is dependant on a measured variable and which is fed to a voltage divider whose pickoff signals are fed to...
6661359 Device and method for generating synchronous numeric signals  
A device for generating synchronous numeric signals, including a reference generating device supplying a reference signal and a first timing signal, both having a reference frequency; and a timed...
6650268 Method and apparatus for a pulse decoding communication system using multiple receivers  
A multiple receiver approach is disclosed for a pulse decoding communication system, which can enhance system robustness and increase information carrying capacity. Two or more receivers are used...
6608573 Automatic resolution changing method and circuit for use in digital conversion of two-phase sinusoidal wave signals  
The present invention provides an automatic resolution changing method and circuit for use in a high-precision digital conversion of two-phase sinusoidal wave signals. The angular velocity (dφ/dt)...
6556153 System and method for improving encoder resolution  
A system and method are disclosed for improving resolution of an encoder or other position sensing device that provides one or more signals indicative of relative movement between two bodies. The...
6518897 Angle quantization using log division  
A system to perform angle quantization includes a log ROM lookup table to provide a log of a real input ( 10 ) of a signal and a log of an imaginary input ( 20 ) of the signal. A subtractor ( 100 )...
6510013 Phase-synchronization method and circuit for establishing a phase-synchronization for signals with reduced time  
A phase-synchronizing circuit includes a phase error detection circuit detecting a phase-error in a given clock signal and producing an output indicative of the phase-error as a first phase-error...
6501399 System for creating and amplifying three dimensional sound employing phase distribution and duty cycle modulation of a high frequency digital signal  
A method of presenting audio information where changes in amplitude and changes in frequency in two channels (stereo) have the additional parameter of phase information added to re-create the...
6498578 Method and apparatus for generating pulses using dynamic transfer function characteristics  
A method and apparatus for generating pulses that includes a circuit having a dynamical transfer function is disclosed. The circuitry exhibits oscillatory behavior when its operating point is...
6498572 Method and apparatus for delta modulator and sigma delta modulator  
According to the invention, oscillating signals are generated from analog signals by providing an analog signal having a variable slope or amplitude to a circuit with a variable operating point and...
6486819 Circuitry with resistive input impedance for generating pulses from analog waveforms  
A decoder for generating output pulses or oscillations in response to input analog waveforms includes a circuit having a variable operating point and having a transfer function characterized by an...
6483447 Digital display unit which adjusts the sampling phase dynamically for accurate recovery of pixel data encoded in an analog display signal  
A digital display unit adjusting the phase of a sampling clock based on the examination of a display data signal contained in a received analog display signal. The phase may be adjusted by...
6480126 Phase digitizer  
A system and method of digitizing characteristic parameters of a quasi-sinusoidal analog signal of unknown magnitude, frequency and phase-offset, includes digitizing the analog signal at a first...
6476744 Method and apparatus for generating pulses from analog waveforms  
A method and apparatus that allows an analog waveform to carry multilevel of information is disclosed. This allows information capacity enhancement in pulse decoding communication system by...
6473014 Sampling device having an intrinsic filter  
A sampling device for sampling an input signal having intrinsic filter properties. The sampling device samples a continuous analog input signal according to a sampling signal. The sampling device...
6456216 Method and apparatus for generating pulses from analog waveforms  
A method and apparatus are provided for generating output pulses or oscillations in response to input analog waveforms which involves exciting, with a known but arbitrary analog waveform, a circuit...
6417791 Delta filter with an adaptive time window for protective relays  
A delta filter for use in a protective relay which includes an input circuit for receiving phasor signals representative of electrical signal quantities on the power line. A difference value, if...
6407684 Method and device for estimating the frequency of a digital signal  
A frequency estimator for estimating the frequency of a digital input signal (x(k)) includes a phase detection device ( 2 ) for determining the phase (φ(k)) of the input signal (x(k)), a...
6407683 Optimized performance incremental encoder with error detection capability  
In an incremental encoder signal processing system there is provided a pair of sensor/encoders adapted to generate a quadrature pair of analog positioning signals that are converted to digital...
6384752 Absolute encoder  
An absolute encoder that can generate an absolute value signal by performing simple operation processing. Phase signals φ 0 to φ 3 are represented by j-bit digital signals, a signal b provided...
RE37547 Software-based resolver-to-digital converter  
A software-based resolver-to-digital converter (RDC) ( 80 ) for computing an angle of rotation Θ of gimbal-mounted instrumentation ( 16 ) in a gimbal system. The RDC ( 80 ) computes the angle of...
6326908 Precision position encoder using coarse position indicator  
Methods and apparatus are presented for precise measurement of mechanical position comprising combination of a plurality of coarse position signals to obtain substantial cancellation of spatial...
Matches 1 - 50 out of 118 1 2 3 >