Patents by Inventor Giancarlo Babini

Giancarlo Babini 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: 4310830
    Abstract: To convert a sample of an amplitude-modulated voltage wave into binary pulses, the sample is simultaneously compared in two coders with two sets of threshold voltages of positive and negative polarity, respectively. Either one of the two coders yields in unbroken succession of pulses, having the same polarity as the sample, whereas the other coder produces a combination of both positive and negative pulses. Following inversion of the pulses issuing from one coder, and upon suppression of the pulses of one polarity (e.g. negative), the two pulse trains are combined into a series of bit groups each representing the absolute amplitude value of a respective sample. The final step in the processing of any sample is the generation of a sign bit in accordance with the polarity of the unipolar pulse train emitted by one of the coders; this sign bit is then transposed to the beginning of the corresponding group of amplitude bits.
    Type: Grant
    Filed: September 11, 1979
    Date of Patent: January 12, 1982
    Assignee: CSELT - Centro Studi e Laboratori Telecomunicazioni S.p.A.
    Inventors: Giancarlo Babini, Bruno Fabbri, Paolo Lucchini
  • Patent number: 4280086
    Abstract: A storage capacitor of a sample-and-hold circuit, e.g. as used in a converter for the digitization of signal amplitudes in a PCM telephone system, is provided with a zero-setting gate comprising two parallel branches that include a first and a second transistor which are respectively saturated during a cancellation phase and a discharge phase of a resetting interval following a sampling period. The first transistor lies in series with a d-c source whose voltage substantially exceeds the maximum amplitude of signals of the same polarity to be stored on that capacitor whereby the latter acquires a charge within a range considerably narrower than the spread of positive and negative signal amplitudes. The second transistor then short-circuits the capacitor so charged, leaving a residual charge of predetermined polarity subject to still smaller variations in magnitude.
    Type: Grant
    Filed: December 27, 1979
    Date of Patent: July 21, 1981
    Assignee: CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A.
    Inventor: Giancarlo Babini