Patents by Inventor Ciro Milazzo

Ciro Milazzo 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).

  • Output limiter for class-D BICMOS hearing aid output amplifier
    Patent number: 5506532
    Abstract: An invention providing a hard limiter between the pulse width modulator and output drive transistors of a class-D amplifier is disclosed. The limiter functions by controlling the duty cycle of the pulse width modulator output, which directly corresponds to the magnitude of the voltage appearing across the load output transducer. The pulse width modulated (PWM) signal is compared to the outputs of a pair of one-shot circuits (single pulse generators). If either the positive pulse or the negative pulse of the PWM signal is shorter than the one-shot pulse, then the one-shot pulse is substituted for the PWM pulse. This sets the maximum and the minimum values for the duty cycle of the PWM signal, thereby limiting the positive and negative value of the corresponding output voltage.
    Type: Grant
    Filed: February 10, 1995
    Date of Patent: April 9, 1996
    Assignee: Exar Corporation
    Inventor: Ciro Milazzo
  • Output limiter for class-D BICMOS hearing aid output amplifier
    Patent number: 5389829
    Abstract: An invention providing a hard limiter between the pulse width modulator and output drive transistors of a class-D amplifier is disclosed. The limiter functions by controlling the duty cycle of the pulse width modulator output, which directly corresponds to the magnitude of the voltage appearing across the load output transducer. The pulse width modulated (PWM) signal is compared to the outputs of a pair of one-shot circuits (single pulse generators). If either the positive pulse or the negative pulse of the PWM signal is shorter than the one-shot pulse, then the one-shot pulse is substituted for the PWM pulse. This sets the maximum and the minimum values for the duty cycle of the PWM signal, thereby limiting the positive and negative value of the corresponding output voltage.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: February 14, 1995
    Assignee: Exar Corporation
    Inventor: Ciro Milazzo