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| Number | Title | Issue Date |
| 4062013 | Non-linear type digital-to-analog converter A non-linear type digital-to-analog converter comprising a decoder, control switching circuits controlled respectively by the outputs of the decoder, and an exponential function generating circuit whose analog outputs are selectively produced by the opera... | 12/06/1977 |
| 4042921 | Digital encoder/decoder An average peak slope companded delta codec for converting an analog signal to a corresponding digital signal and vice versa includes a comparator which receives an analog signal and a variable reconstruction signal and converts the analog signal into a d... | 08/16/1977 |
| 4032913 | Coding equipment providing compressed code In a parallel digital signal delivered from an AD converter, "1" appearing in a bit position nearest to the most significant digit (MSD) is detected, and the parallel digital signal is converted into a serial digital signal consisting of a weight characte... | 06/28/1977 |
| 4025868 | Frequency digital converter The proposed device serves to convert the input frequencies into corresponding digital values. In the pulse counting means for counting the pulses from a reference oscillator during each period of the input signal to be processed, the frequency of the ref... | 05/24/1977 |
| 4021800 | Non-linear coder for pulse code modulation of telephone signals or the like A non-linear coder for use in a time-division multiplex pulse code modulation telephone transmission system is disclosed. Non-linear coding is accomplished by the selection of each segment that is necessary for coding by control pulses in accordance with ... | 05/03/1977 |
| 4021799 | Non-linear coding system A differential signal circuit employing a local decoder and comparator to forecast a reference amplitude to be coded by a non-linear coding system. A non-linear coding means connected to an controlled by the output of the forecast means adaptively varies ... | 05/03/1977 |
| 4020485 | Non-linear digital-to-analog converter for servo circuit A shunt-series resistive network in which the shunt elements are switched in and out of the circuit in accordance with the individual bits of a digital binary signal and wherein the values of the various resistive elements are selected to provide a networ... | 04/26/1977 |
| 4014023 | Beam former utilizing geometric sampling Samples of signals received by elements responsive to incident radiation, such as an array of sonar transducers, are obtained as exponents of the base two by a successive approximation register and decoder coupled together in a feedback loop by a comparat... | 03/22/1977 |
| 4011502 | Logarithmic ratemeter with bistable signal comparison A logarithmic ratemeter has a plurality of bistable devices each having two inputs the first of which is connected to a common input line for receiving voltage pulses from a detector of atomic particles and the second of which is connected to a secondary ... | 03/08/1977 |
| 4010422 | Transmitter for forming non-linear pulse code modulated samples of analog signals by timing the integral of signal samples A non-linear pulse code modulator wherein input signals are coded into digital representations of amplitude range segments and amplitude in excess of the minimum amplitude within the respective range segment uses a first analog-to-digital converter having... | 03/01/1977 |
| 4000463 | Direct-reading decibel meter A digital display electronic meter apparatus is disclosed which is capable of displaying amplitude ratio measurements directly in decibels over its entire amplitude operating range.... | 12/28/1976 |
| 3999181 | Non-linear digital-to-analog convertor Non-linear convertor for converting a data item given in digital form into n analog data item, the value of the digital data item being defined by position digits inside a range of values defined by range digit, characterized in that the convertor comprise... | 12/21/1976 |
| 3999123 | Digital voltage level measuring device A digital voltage level measuring device includes an amplifier having a capacitive feedback the output voltage of which is brought to a value dependent upon the integration result reached within a given interval of time of a voltage to be measured. After ... | 12/21/1976 |
| 3997892 | Digital to analog converter with improved companding A digital to analog converter includes nonlinear and linear cascaded resistive voltage dividers the nonlinear divider having its resistors valued to approximate a desired transfer characteristic. The high order bits of the digital input code select a pred... | 12/14/1976 |
| 3995265 | Analogue divider with digital output for spectrophotometry The sample output from a spectrophotometer is accumulated for a predetermined number of clock pulses and then compared with an accumulation of the reference output of the spectrophotometer and predetermined antenuations thereof for measured numbers of clo... | 11/30/1976 |
| 3993992 | Circuit arrangement for converting analog signals into PCM signals and PCM signals into analog signals An analog signal PCM signal/PCM signal-analog signal converter having a sawtooth generator, the sawtooth voltage of which is compared in a first comparator with the analog signal to be converted, the sawtooth signal being represented in instantaneous ampl... | 11/23/1976 |
| 3990799 | Digital exposure meter In an exposure meter having a row of lighting elements, such as lamps or light-emitting diodes, which correspond to respective exposure values, an improvement is made in that by utilizing a capacitor-charging integrating circuit, a constant current circui... | 11/09/1976 |
| 3990000 | Alternating current control system An alternating current signal is applied across a series connected switch and load and also to a synchronous ramp generator. The switch is closed by a comparator when the ramp generator output signal is greater in a given sense than an analog reference si... | 11/02/1976 |
| 3988069 | Automatic control device for cameras This invention relates to an automatic camera exposure control device comprising a first light measuring circuit including a photoelectric element receiving light through the objective lens of the camera and generating a first output proportional to the l... | 10/26/1976 |
| 3984829 | Circuit arrangement for converting analog signals into PCM signals and PCM signals into analog signals A circuit arrangement is described for converting pulse amplitude modulated (PAM) signals into pulse code modulated (PCM) signals and vice versa utilizing a nonlinear bend characteristic, rather than carrying out a linear conversion. A voltage having a va... | 10/05/1976 |
| 3958088 | Communications systems having a selective facsimile output A switched communications system including store and forward facilities is provided in accordance with the teachings of the present invention wherein, in an exemplary embodiment, any of a plurality of teleprinter or teletypewriter peripherals may be given... | 05/18/1976 |
| 3949299 | Signal coding for telephone communication system A telephone communication system reversibly converts input signals into adaptive delta modulated (hereafter ADM) signals and then into pulse code modulated signals. In one embodiment, an encoder of a telephone communication system receives analog signals,... | 04/06/1976 |
| 3947806 | Automatic gain control for seismometer recorders This is a seismic digital recording system for use where the seismic amplifiers are placed near the geophone locations and their outputs transmitted by common cable to the recording truck or recorded on magnetic tape at the geophone location. In such a di... | 03/30/1976 |
| 3935569 | Digital coder The invention concerns a digital coder subject to a compression law having multiple linear segments with slopes decreasing in geometrical progression having a ratio of 1/2, in which a chain of threshold detectors in a linear progression is used a first ti... | 01/27/1976 |
