Electrical audio signal processing systems and devices – Including amplitude or volume control – With amplitude compression/expansion
Patent
1992-07-07
1994-04-12
Kuntz, Curtis
Electrical audio signal processing systems and devices
Including amplitude or volume control
With amplitude compression/expansion
381 72, 381108, 333 14, H03G 700, H03G 300, A61F 1106, H04B 164
Patent
active
053033086
ABSTRACT:
An audio frequency compressing system for amplifying an input signal to produce a power output signal while removing high-level signals which could harm a listener. Gain control in the feedback path of an amplifier includes both a gain controller circuit for supplying a constant feedback impedance and a plurality of resistors which can be coupled to the gain controller circuit to increase or decrease the feedback impedance. Coupling of the resistors to the gain controller circuit is controlled by a feedback control circuit having both an automatic gain control circuit and a continuous high-level protection circuit.
REFERENCES:
patent: 4466119 (1984-08-01), Peters et al.
patent: 4893344 (1990-01-01), Tragardh et al.
patent: 4928307 (1990-05-01), Lynn
patent: 5058155 (1991-10-01), Larsen
Larsen Leo
Madsen Jens
GN Netcom A/S
Kuntz Curtis
Lee Ping
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