G - Physics – 11 – B
Patent
G - Physics
11
B
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G11B 5/027 (2006.01) H03G 7/00 (2006.01) H03G 9/02 (2006.01) H03G 11/00 (2006.01) H04B 1/64 (2006.01)
Patent
CA 1150638
SO13O1 S8OP51 GAIN CONTROL CIRCUIT FOR NOISE REDUCTION SYSTEM ABSTRACT OF THE DISCLOSURE An input gain control circuit for an audio signal recorder includes a first transmission path for compressing an audio signal supplied thereto and having a variable gain ampli- fier and a control circuit which supplies a control signal to the variable gain amplifier for varying the gain thereof, a second transmission path for transmitting the audio signal with substantially unity gain through a resistor thereof, and an adding amplifier for adding the compressed audio signal from the first transmission path and the audio signal with substantially unity gain from the second transmission path whereby the com- pressed audio signal is effectively transmitted for recording when the level of the audio signal is below a predetermined value and the audio signal with substantially unity gain is transmitted for recording when the level of the audio signal is above the predetermined value. A complementary output gain control circuit substantially recreates the original audio signal when the above recorded signal is reproduced. -1-
352484
Gowling Lafleur Henderson Llp
Sony Corporation
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