Digital signal gain control circuitry for varying digital...

Details Digital signal gain control circuitry for varying digital... Digital signal gain control circuitry for varying digital...

H - Electricity

03

G

179/40, 179/5

H03G 3/00 (2006.01) H03G 7/00 (2006.01)

Patent

CA 1277921

Abstract A volume control or amplitude varying system for digital signals includes a cascade connection of a coarse multiplier/divider for changing the values of digital signals in 6 db steps and a fine multiplier/divider for changing the values of digital values logarithmically in substantially equal steps of less than 6 db per step. The coarse multiplier/divider selectively multiplies the digital signal by powers of 2. The fine multiplier/divider multiplies the digital signal by predetermined values, an ascending/descending sequence of which form a substantially logarithmic sequence. Both serial-bit and parallel-bit embodiments are described.

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