Title:
ELECTRONIC VOLUME
Document Type and Number:
Japanese Patent JP2022011911
Kind Code:
A
Abstract:
To provide an electronic volume in which attenuation accuracy of an interpolation volume is increased, and a click noise is suppressed.SOLUTION: An electronic volume comprises: a first volume gradually changing an input electric signal in a first attenuation amount; a second volume that interposes the first attenuation amount of the first volume by changing it in a second attenuation amount smaller than the first attenuation amount; a control circuit that controls an attenuation amount in each of the first volume and the second volume, respectively; a third volume that is changed in the attenuation amount of a ratio similar to the attenuation amount in the second volume by being interlocked to the second volume; and a comparator that compares a reference amount corresponded to the first attenuation amount with the attenuation amount of the third volume. The control circuit changes the attenuation amount in the first volume by one step when an output of the comparator is reversed.SELECTED DRAWING: Figure 1
Inventors:
SATO MASAYUKI
Application Number:
JP2020113335A
Publication Date:
January 17, 2022
Filing Date:
June 30, 2020
Export Citation:
Assignee:
NEW JAPAN RADIO CO LTD
International Classes:
H04R3/00
Attorney, Agent or Firm:
Asahina Patent Office