Decibel adjustment device with shift amount control circuit
AssigneeNEC Corporation
InventorMasahiko Nakayama
Life of this patent
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Abstract
A decibel level adjustment device that calculates an output signal that is a d decibel multiple of an input signal comprises a plurality of shift circuits, a shift amount control circuit, and adders. The shift circuits shift an input signal by exactly a designated number of bits in a designated direction. The shift amount control circuit receives the value of d as a decibel control value, and in accordance with this decibel control value, generates and outputs control signals that indicate the number of bits to shift and the shift direction of each shift circuit. The adder adds the outputs of the shift circuits.
Claims4
A decibel level adjustment device for calculating an output signal which is a d decibel multiple of an input signal, comprising:
- a plurality of shift means arranged parallel to each other for shifting said input signal exactly a designated number of bits in a designated direction;
- a shift amount control circuit means for receiving the value of said d as a decibel control value and, in accordance with said decibel control value, for generating and outputting a control signal indicating the direction and number of bits of shifting of each of said shift means;
- and
- adder means for adding the outputs of said shift circuits together.
Dependencies are inferred from the claim text.