Electricity: conductors and insulators – Feedthrough or bushing – Compression
Patent
1982-11-24
1985-02-12
Rubinson, Gene Z.
Electricity: conductors and insulators
Feedthrough or bushing
Compression
174107R, 128784, 332 31R, H04R 2500
Patent
active
044993390
ABSTRACT:
An apparatus and a method modulate a carrier signal so that the resultant modulated signal varies between a value substantially equal to the quiescent level of the carrier signal and peak values up to several hundred percent of the quiescent level of the carrier signal. The apparatus includes an electrical circuit for adjusting the modulating signal so that it is clamped at a reference value to prevent overmodulation. The clamped signal controls a variable resistance mechanism which forms a part of the gain determining portion of a modulator circuit including an amplifier. The amplifier modulates the carrier signal in accordance with the gain determined by the variable resistance. The variable resistance is controlled by the clamped signal so that it causes the gain of the amplifier circuit to vary between approximately one and a value greater than one. So that the apparatus can be used by a person having a hearing impediment wherein the dynamic range detectable by the user is less than the dynamic range detectable by a normal ear, the apparatus also includes a circuit which compresses a detected acoustical signal which is within a first dynamic range into an electrical modulating signal within a dynamic range which is smaller than the first dynamic range and which is within the dynamic range perceivable by the user of the apparatus.
REFERENCES:
patent: 2066970 (1937-01-01), Fyler
patent: 4052572 (1977-10-01), Schafer
patent: 4063048 (1977-12-01), Kissiah
Manual of Linear Integrated Circuits: Operational Amplifiers and Analog ICs, Sol. D. Prensky, Reston Publishing Company, Inc.
Handbook of Modern Electronic Data, Matthew Mandl, Reston Publishing Company, Inc.
Manual for Integrated Circuit Users, John D. Lenk, Reston Publishing Company, Inc.
Electronic Circuit Manual, John Markus, McGraw-Hill Book Company.
Basic Radio, vol. 6, (Revised Second Edition), Marvin Tepper, Hayden Book Company, Inc.
The Application of Signal Processing Concepts to Hearing Aids, Editors Paul Yanick, Jr. and Stephen Freifeld, Grune and Stratton.
400 Ideas for Design, vol. 4, Edited by Morris Grossman, Hayden Book Company, Inc.
Modern Electrical Communications-Theory and Systems, Henry Stark and Franz B. Tuteur, Prentiss-Hall, Inc.
Handbook of Simplified Solid-State Circuit Design, John D. Lenk, Prentiss-Hall, Inc.
Baptist Medical Center of Oklahoma, Inc.
Gilbert III E. Harrison
Rubinson Gene Z.
Schroeder L. C.
LandOfFree
Amplitude modulation apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Amplitude modulation apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amplitude modulation apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1391157