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| Number | Title | Issue Date |
| 7221669 | Cellular telephone having improved in-band signaling for data communications over digital wireless telecommunications networks An inband signaling modem communicates digital data over a voice channel of a wireless telecommunications network. An input receives digital data. An encoder converts the digital data into audio tones that synthesize frequency characteristics of human speech. The di... | 05/22/2007 |
| 7193552 | Flash analog-to-digital converter A differential input flash analog-to-digital converter in which an array of comparators is connected to compare reference signals within a parabolic distribution of such signals generated by the application of a differential input signal across an impedance network.... | 03/20/2007 |
| 7193449 | Method and apparatus for generating multi-phase signal A multi-phase signal generating apparatus is provided for readily generating multiple phase signals. The multi-phase signal generating apparatus comprises a signal data storage which stores a plurality of data segments for determining a predetermined period of one s... | 03/20/2007 |
| 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 encoded signal A1. The DSP generates a selection si... | 10/10/2006 |
| 7081772 | Optimizing logic in non-reprogrammable logic devices A method for reducing the amount of logic needed to perform logic operations in non-reprogrammable logic devices based on preexisting circuit designs is provided. The logic optimization method reduces die size and power consumption while increasing the performance o... | 07/25/2006 |
| 6154101 | Fast slewing pseudorandom noise sequence generator A novel and improved method and apparatus for a fast-slewing pseudorandom noise sequence generator is described. One or more loadable PN generators are controlled by a DSP or microprocessor in conjunction with a free-running counter which maintains a refe... | 11/28/2000 |
| 5828588 | Parametrizable control module comprising first and second loadable counter, an electronic circuit comprising a plurality of such parametrized control modules, and a method for synthesizing such circuit A parametrizable control module comprising first and second loadable counters, an electronic circuit comprising a plurality of such parametrized control modules, and a method for synthesizing such circuit. A parametrizable control module comprises a first and ... | 10/27/1998 |
| 5268847 | Digital synthesis of waveforms An apparatus and method for synthesizing waveforms includes digital circuitry (12) designed to provide a predetermined pulse train of data over a serial line (16), such that, when the pulse train is filtered, a synthesized waveform is produced which appro... | 12/07/1993 |
| 5140540 | Delay equalization emulation for high speed phase modulated direct digital synthesis In a pipelined direct digital synthesis system (FIG. 3), new increment data (124) and/or phase modulation data (122) are input delay equalized by providing the data to a series of switch blocks (132), each switch block corresponding to a stage of the accu... | 08/18/1992 |
| 4956798 | Arbitrary waveform generator with adjustable spacing An arbitrary waveform generator using packet data words to represent segments of a desired complex waveform includes a variable clock. Each packet data word contains a clock control word that is used to control the variable clock frequency so that the dur... | 09/11/1990 |
| 4935891 | Pseudo-random phase shifted arithmetic bit clock generators for digital printers An arithmetic frequency synthesizer for generating a bit clock for the flying spot scanner of a digital printer includes means for loading a pseudo-random offset value, accmi ; into its accumulator at the start of each scan. The offset values f... | 06/19/1990 |
| 4701872 | Aperiodic waveform generation using stored markers identifying scaled waveform sections In an apparatus for generating an aperiodic waveform having a gradually decaying envelope, a sequence of digital samples representing the magnitude of the waveform at sample points is stored in a memory. The stored digital samples are grouped into at leas... | 10/20/1987 |
| 4692886 | Digital pattern generator A digital pattern generator generates various kinds of digital pattern signals. A first memory stores an execution signal, an area control signal and a digital pattern. A program counter generates a first address signal in accordance with the execution si... | 09/08/1987 |
| 4513387 | Method and an apparatus for generating periodic digital time function signals A method and an apparatus for obtaining digital periodic time function signals, and wherein each time function signal is defined by an instantaneous frequency varying in dependence of time within a characteristic period T equal to the period of a first cl... | 04/23/1985 |
| 4464727 | Parabolic function generator A function generator responsive to clock pulses for developing an analog signal in the form of a digitally approximated parabola.... | 08/07/1984 |
| 4404644 | Waveform generator A waveform generator for generating a plurality of repetitive digital waveforms having a common repetition period which is an integral number of periods of a clock signal, the transitions of each waveform during the repetition period occurring synchronous... | 09/13/1983 |
| 4267579 | Digital waveform generator having constant signal to noise ratio An electronic musical instrument includes a p-bit memory sequentially storing the resolution contributing bits of a sequence of n-bit samples, the n-bit sequence representing a percussive-type waveform. The p-bit memory is sequentially addressed with each... | 05/12/1981 |
| 4231099 | Digital function generator A counter is provided to count pulses applied thereto, with the output of the counter being applied to decode circuitry which operates selection or switching circuits to connect a plurality of pulse sources, each at a different repetition rate or frequenc... | 10/28/1980 |
| 4225936 | Function generator with storage matrix A function generator comprising an oscillator, an address counter, a storage matrix with 2n addresses at m bits, and a digital to analog converter in which the storage matrix which is organized only according to the change which is maximally ob... | 09/30/1980 |
| 4024385 | Second difference function generator High accuracy function calculating apparatus using a minimum of components and storage locations. Second difference values of the function to be generated are stored in a read-only memory which is addressed by an incrementable and reversible address count... | 05/17/1977 |
