Headset with limiter circuit

Details Headset with limiter circuit Headset with limiter circuit

1979-02-26

1980-09-23

Morrison, Malcolm A.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307237, 179 1P, H03G 330

Patent

active

042244706

ABSTRACT:
Each of a pair of ear pads is provided with an electrically-operated earphone. The earphones are connected to each other by a circuit having a cord for connecting the earphones to an external audio-signal source. The circuit includes a pair of Zener diodes connected in back-to-back or opposed parallel relation to each other, and in parallel to the earphones so that if an incoming AC audio signal exceeds a predetermined value one of the diodes will fire to short the input signal, thus limiting the output (in decibels) of the earphones. A field-effect transistor is connected in series with the earphones to limit the current load thereto.

REFERENCES:
patent: 3306991 (1967-02-01), Wood
patent: 3959602 (1976-05-01), Jayson
patent: 3991272 (1976-11-01), Tarr
patent: 4064362 (1977-12-01), Williams
patent: 4068090 (1978-01-01), Komatsu et al.
patent: 4079211 (1978-03-01), Janssen

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