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| Number | Title | Issue Date |
| 4973975 | Initial potential setting circuit for a sample/hold circuit associated with an A/D converter One of analog input voltages applied to a plurality of analog input terminals is selected by means of analog switches connected to the respective analog input terminals and supplied to a common terminal. In this case, each of the analog switches permits s... | 11/27/1990 |
| 4947168 | Subranging analog-to-digital converter with calibration A successive sub-ranging A/D converter circuit is disclosed which incorporates adaptive error correction for a high accuracy digitization of analog input signals. The circuit comprises an A/D converter operative to convert analog input signals into a digi... | 08/07/1990 |
| 4940981 | Dual analog-to-digital converter with single successive approximation register A dual successive approximation analog-to-digital converter, including circuitry for generating separate reference voltages for each analog-to-digital converter, is integrated onto a single semiconductor chip. A single successive approximation register in... | 07/10/1990 |
| 4914439 | Analog to digital conversion system utilizing dither A system suitable for digitizing an analog audio signal, with the addition of analog dither to the audio signal and, after the digitization of the resulting analog audio/dither signal, the subtraction of digital dither from the digital audio/dither signal... | 04/03/1990 |
| 4908621 | Autocalibrated multistage A/D converter An autocalibrated multistage analog to digital converter precisely maintains appropriate error correction levels for each stage during operation of the converter to minimize quantization errors. An error signal is derived from the digital output of the co... | 03/13/1990 |
| 4903026 | Architecture for high sampling rate, high resolution analog-to-digital converter system A high resolution analog-to-digital (A/D) converter (14) and a pipelined A/D converter are used in a single system so that unknown offset and gain errors of the pipe-lined A/D converter are determined and corrected. Each stage of the pipelined A/D convert... | 02/20/1990 |
| 4903027 | A/D converter comprising encoder portion having function of multiplying analogue input by digital input An A/D converter of a serial-parallel comparison type has both multiplying functions of an analog input data and a digital input data. The analog input data VX is converted into a digital code Ic corresponding to two more significant... | 02/20/1990 |
| 4897658 | Analog-to-digital converter of successive-approximation type An analog-to-digital converter of the successive-approximation type has a successive-approximation logic circuit for successively generating selection signals defined by significant bits in a digital value, a string of high resistance elements to provide ... | 01/30/1990 |
| 4866443 | A/D converter having multiplication function A semiconductor integrated circuit includes a plurality of comparators for comparing an analog input with reference voltage or voltages, holding means for holding a digital value, and control means for controlling the outputs of the plurality of comparato... | 09/12/1989 |
| 4843390 | Oversampled A/D converter having digital error correction An oversampled A/D converter which utilizes digital error correction is provided. In one form, the present invention is used with a sigma delta modulator having a plurality of rank ordered quantization loops, Each quantization loop contains an analog inte... | 06/27/1989 |
| 4821036 | Method of and apparatus for producing a digital indication of the time-integral of an electric current A digital representation of the time-integral of the illumination-dependent electric current flowing in a photo-conductive diode (1) is produced by feeding the current initially to the first capacitor (3a) of a series of capacitors (3a-3d). When the volta... | 04/11/1989 |
| 4771266 | A/D converter An A/D converter including a D/A converter which generates a reference voltage; a comparator which compares a sampled analog input voltage with the reference voltage; and a sequential comparator control circuit which repeats the comparison steps that inpu... | 09/13/1988 |
| 4630031 | Pulse-width discriminating A/D converter Method and apparatus for converting an analog pulse-width signal into a digital signal through the transmission of the analog signal through a delay loop. The resulting delayed signal is then combined with the original signal in an OR gate providing an ou... | 12/16/1986 |
| 4599602 | Serial-type A/D converter utilizing folding circuit cells In a serial-type A/D converter utilizing folding circuit cells connected in cascade, the cell has a differential type input and a differential type output, and a comparator included in the cell switches over current paths in the cell to establish a foldin... | 07/08/1986 |
| 4595909 | N-bit propagatary analog-to-digital converter system The application of peristaltic charge-coupled-devices to an analog delay e provides an ultra high speed n-bit propagatory analog-to-digital converter system. The system also includes somewhat unconventional ECL weighted current source digital-to-analog c... | 06/17/1986 |
| 4571507 | Successive approximation analog-to-digital converter A successive approximation analog-to-digital converter utilizes an improved high-gain current comparator having a zero input impedance characteristic in combination with an equal current digital-to-analog converter. The zero input impedance comparator per... | 02/18/1986 |
| 4553128 | Analog-to-digital converter This analog-to-digital converter includes a comparator (20) to which the samples X.sub.(n) of the signal to be converted, are applied. The output of the comparator controls a logic circuit (22) producing (N+1) bits to a digital-to-analog converter (24) th... | 11/12/1985 |
| 4471341 | Pipe-lined CCD analog-to-digital converter An analog-to-digital converter (ADC) uses pipe-lined data flow through parallelled charge transfer channels in a CCD for implementing a successive-approximation conversion algorithm. Successive charge splitting divides a standard level charge packet into ... | 09/11/1984 |
| 4306224 | Analog-to-digital converting apparatus An analog-to-digital converting apparatus having a plurality of stages arranged in series, each stage including a comparator. The positive input terminals of all the comparators are connected in common to the analog signal input terminal. The negative inp... | 12/15/1981 |
| 4295089 | Methods of and apparatus for generating reference voltages Methods of and apparatus for generating precise reference voltages in a system utilizing a reference voltage V is disclosed including apparatus having a comparator, a voltage-to-current pulse converter having an input coupled to an output terminal of the ... | 10/13/1981 |
| 4194185 | Digitizing a recurring analog signal A recurring analog signal is digitized by repeatedly comparing it to a reference level, or to several reference levels, during each signal occurrence to determine where the signal has a value related to each reference level. The reference level, or levels... | 03/18/1980 |
| 3968486 | Analog to digital converter An electronic analog to digital converter utilizing a plurality of analog comparators, all comparators receiving a common analog input and separate respective reference voltages for comparison. The outputs of the comparators provide respectively the digit... | 07/06/1976 |
