Patents by Inventor Hendrik Arie VAN Essen

Hendrik Arie VAN Essen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4121296
    Abstract: Digital signal processing arrangement such as a digital filter for computing output signal samples which are each equal to the sum of products of a given plurality of pairs (for example N) of input signal samples. One of the input signal samples of the pair is, for example, formed each time by a sample x(n) of a digital signal to be filtered, the other input signal sample of the pair by a filter coefficient z(n), wherein either the sample x(n) or the filter coefficient z(n) can assume only a limited number of values 0, .+-.A.sub.1, .+-.A.sub.2, . . . .+-.A.sub.M, M being much smaller than N. In the case x(n) can assume only this limited number of values, z(n) is first multiplied, owing to the x(n) belonging to the pair, by the sign of x(n) for generating a product of the form z(n). sgn [x(n)]. In-dependent of the magnitude of n(n) this product is applied to an accumulator which corresponds with this magnitude of x(n).
    Type: Grant
    Filed: June 20, 1977
    Date of Patent: October 17, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Wilfred Andre Maria Snijders, Nicolaas Alphonsus Maria Verhoeckx, Petrus Josephus Van Gerwen, Hendrik Arie Van Essen
  • Patent number: 4040027
    Abstract: A digital data transfer system having information read-out from a first memory to a user device through temporary storage in an intermediate second memory. The system includes a measuring device which determines the extent to which the second memory is filled with information read-out from the first memory while the information is being transferred to the user device from the second memory. Upon detecting a predetermined first degree of filling, the measuring device produces a first alarm signal which, after a given first delay, is used to temporarily block further read-out of information from the first memory. Afer a predetermined second degree of filling of the second memory in then detected, the measuring device produces a second alarm signal which, after a given second delay, is used to resume the read-out of information from the first memory to the second memory.
    Type: Grant
    Filed: April 21, 1976
    Date of Patent: August 2, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Lambertus Gerardus van Es, Hendrik Arie VAN Essen, Nicolaas Cornelis DE Troye
  • Patent number: 4003002
    Abstract: A digital data transmitter is described, whose line carrier frequency need not be an integral multiple of one half the clock frequency of the digital input signal. Use is made of a digital filter for increasing the sampling frequency to a value which is twice the modulator carrier wave frequency.
    Type: Grant
    Filed: August 27, 1975
    Date of Patent: January 11, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Wilfred Andre Maria Snijders, Nicolaas Alphonsus Maria Verhoeckx, Petrus Josephus VAN Gerwen, Hendrik Arie VAN Essen
  • Patent number: 3997773
    Abstract: A non-recursive interpolating digital filter for generating, output code works, at an arbitrary rational ratio between the input and output sampling frequencies. The input code words are entered and stored in a buffer, and entered into a storage device at predetermined times determined by a controlled pulse generator.
    Type: Grant
    Filed: August 25, 1975
    Date of Patent: December 14, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Hendrik Arie Van Essen, Nicolaas Alphonsus Maria Verhoeckx, Wilfred Andre Maria Snijders
  • Patent number: 3988607
    Abstract: An interpolating non-recursive digital filter in which the circulating storage device which has a periodically changing storage time, is controlled by a clock-pulse generator, and has an output circuit whereby within one input sampling period the input code words stored in the storage device are supplied a predetermined number of times to the multiplying device.
    Type: Grant
    Filed: August 25, 1975
    Date of Patent: October 26, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Ludwig Desire Johan Eggermont, Hendrik Arie Van Essen, Petrus Josephus Van Gerwen, Wilfred Andre Maria Snijders
  • Patent number: 3978323
    Abstract: An apparatus for producing a predetermined transfer characteristic of information-containing signals, comprising clock means for generating a clock pulse, input means for supplying digital representations of said information-containing signals; coefficient generator means for supplying a first train of pulses of digital multiplication coefficients; delay means; digital multiplier means; and a storage device including an alternator provided with a sign reversing device and a summation device.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: August 31, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Wolfgang Friedrich Georg Mecklenbrauker, Petrus Josephus VAN Gerwen, Wilfred Andre Maria Snijders, Theodoor Antonius Carel Maria Claasen, Hendrik Arie Van Essen
  • Patent number: 3965338
    Abstract: A pulse switched digital multiplier for matching transfer characteristics of digital processes having a plurality of pulse switch positions, and a pulse switch setting circuit which, under the control of a setting code from a setting program, sets the pulse switch to a given one of the pulse switch positions. Each switch position corresponds to a discrete digital multiplication performed by one of a plurality of discrete multiplication coefficients forming part of the discrete number set 2.sup.m, (where m = 0, 1, 2, . . . . ,) and possibly the number 0. A storage device in the form of an integrater is also provided.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: June 22, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Petrus Josephus van Gerwen, Hendrik Arie VAN Essen, Wilfred Andre Maria Snijders