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| Number | Title | Issue Date |
| 7821431 | Universal and fault-tolerant multiphase digital PWM controller for high-frequency DC-DC converters A multiphase hybrid digital pulse width modulator can comprise a counter that is selectable between at least two different numbers of states to indicate a first portion of a switching period. Unclocked logic can indicate a second portion of the switching period. The... | 10/26/2010 |
| 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 |
| 7215142 | Multi-stage inverse toggle An inverse toggle circuit includes a pair of input connections for receiving each of four possible input signal combinations in a sequential rotational manner. Each of four data paths are defined to be exercised in accordance with a respective input signal combinati... | 05/08/2007 |
| 7208944 | Method for determining the angular position of a rotating object and rotary encoder A method for determining the angular position of a rotating object and rotary encoder is disclosed. In one embodiment, the method includes a method for determining the angular position of an object rotating about a rotation axis in a rotation direction and having a ... | 04/24/2007 |
| 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 |
| 7081730 | Motor controller system for large dynamic range of motor operation A motor controller system uses a rotary sensor with a plurality of signal conditioning units, coupled to the rotary sensor. Each of these units, which is associated with a particular range of motor output shaft rotation rates, generate a feedback signal indicative o... | 07/25/2006 |
| 6778119 | Method and apparatus for accurate digital-to-analog conversion A digital-to-analog converter includes a plurality of current sources, a differential amplifier, and a plurality of switching modules. The plurality of switching modules is operably coupled to the plurality of current sources and the digital amplifier module provide... | 08/17/2004 |
| 6535152 | Analog-to-digital converter having gamma-corrected reference voltages An analog-to-digital converter with a gamma correction function includes a gamma correction unit for generating a plurality of reference voltages corrected according to a gamma function and a decoding unit for selecting at least one corrected reference vo... | 03/18/2003 |
| 6166573 | High resolution delay line A high resolution delay line includes a coarse delay having a minimum period of delay and a fine delay having a total delay, wherein the total delay is equal to or greater than half the minimum period. Each delay can be implemented in analog or digital fo... | 12/26/2000 |
| 5191336 | Digital time interpolation system A digital time interpolation system and method for quantizing the time-difference between two digital signals. The present invention measures the time-difference between consecutive zero crossings of a user signal and a reference oscillator. The present i... | 03/02/1993 |
| 5121116 | Absolute position encoder An absolute position encoder for detecting the position of a moving object includes a coding part attached to the moving object which receives sinusoidal and cosinusoidal signals through channels. Each channel receiving signals having a different number o... | 06/09/1992 |
| 5008670 | Phase/digital conversion method and arrangements for implementing the method A new method is presented which converts the phases and frequencies of HF and microwave signals into sequences of digital words. This phase quantization is 10 times faster compared to conventional amplitude quantization by means of extremely fast A/D conv... | 04/16/1991 |
| 4992716 | Motor control with digital feedback A motor feedback control system which in addition to a quantized digital position feedback value, uses a feedback signal which represents the error between the actual motor position and the quantized digital position. The error function is combined with t... | 02/12/1991 |
| 4340939 | Solid-state resolver apparatus including digital angle modifier A resolver apparatus for receiving simultaneously a vectorial input signal and an angular input signal. The apparatus comprises a first resolver, a second resolver and a digital angle modifier consisting of a memory and an adder. The angular input signal ... | 07/20/1982 |
| 4308525 | Dual speed resolver to digital converter with improved course-fine interlock A dual speed resolver to digital conversion system with coarse and fine interlocking. The reference frequency is utilized to drive a bang-bang servo loop under priority control of the coarse mathetics when it is necessary to pass control to the coarse loo... | 12/29/1981 |
| 4014014 | Synchronized multispeed transducer position indicating system A method and apparatus for synchronizing the digitized position output of a multispeed system having overlapping position indications. The output of the multispeed position indicating system is a digital output word which is a combination of the individua... | 03/22/1977 |
