Abstract: An analog-to-digital converter according to the present invention comprising a comparator having first and second inputs, and an output, the comparator comparing an analog input voltage at the first input to a tracking voltage at the second input to place a digital output on the comparator output in response thereto, a voltage switching matrix having an input connected to the output of the comparator and an output, an integrator having an input connected to the output of the voltage switching matrix and an output connected to the second input of the comparator to complete a feedback loop and to provide the tracking signal to the second input of the comparator, and a digital filter coupled to the output of the comparator, the digital filter to form a digital output corresponding to the analog input signal at the first input of the comparator.
Abstract: A hearing compensation system for the hearing impaired comprises an input transducer for converting acoustical information at an input to electrical signals at an output, an output transducer for converting electrical signals at an input to acoustical information at an output, a plurality of bandpass filters, each bandpass filter having an input connected to the output of said input transducer, a plurality of AGC circuits, each individual AGC circuit associated with a different one of the bandpass filters and having an input connected to the output of its associated bandpass filter and an output connected to the input of the output transducer.
Type:
Grant
Filed:
January 16, 1996
Date of Patent:
December 8, 1998
Assignee:
Sonix Technologies, Inc.
Inventors:
Thomas G. Stockham, Jr., Douglas M. Chabries