Aural transmitter device

Details Aural transmitter device Aural transmitter device

1982-12-27

1985-03-19

George, Keith E.

Electrical audio signal processing systems and devices

Noise or distortion suppression

Interpolation

381121, 381108, H04B 1500, H03G 300

Patent

active

045063818

ABSTRACT:
An aural transmitter device is improved by largely eliminating the amplification of ambient environmental noise. To this end, control may be effected in response to the difference between a smoothed, rectified output of an amplifier and a reference voltage, either with or without a high-pass filter for removing low frequency noise components.

REFERENCES:
patent: 2606972 (1952-08-01), Scott
patent: 3183304 (1965-05-01), Schroeder
patent: 3497830 (1970-02-01), Colton et al.
patent: 3815039 (1974-06-01), Fujisawa et al.
patent: 3925618 (1975-12-01), Kato et al.
patent: 4143325 (1979-03-01), Kahn
patent: 4166924 (1979-09-01), Berkley et al.
patent: 4358738 (1982-11-01), Kahn
patent: 4388731 (1983-06-01), King
patent: 4414689 (1983-11-01), Enderson
Forrest M. Mims, III, "Engineer's Notebook: A Handbook of Integrated Circuit Applications," .COPYRGT.1979 by Radio Shack.

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