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A Voltage-Controlled Low-Pass High-Pass Filter for Audio Signal Processing

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A voltage-controlled low-pass high-pass filter is described. The frequency cutoff slopes approach 24 db/octave. The relation between the control voltage and the cutoff frequency is exponential over a two-decade frequency range. Additional networks couple the low-pass and high-pass sections for band pass or band reject operation.

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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=1027

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AES - Audio Engineering Society