Title:
NOISE SHAPING METHOD AND CIRCUIT
Document Type and Number:
Japanese Patent JP3522621
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a tertiary noise shaping method and a circuit getting high S/N without need of decay coefficient multiplication at an integrating means.
SOLUTION: The noise shaping circuit has a delay means 9 delaying an output signal for one sampling time, a first subtracting means 1 subtracting a delayed signal delayed by the means 9 from an input signal, a first integrating means 2 integrating an output of the first subtracting means 1, a second subtracting means 3 subtracting the input signal from the output of the first integrating means 2, a second integrating means 4 integrating the output of the second subtracting means 3, a third subtracting means 5 subtracting the delayed signal from the output of the second integrating means 4, a third integrating means 6 integrating the output of the third subtracting means 5, an adding means 7 adding those output of the first, second and third integrating means, a quantization means 8 quantizing the output of the adding means 7 and outputting as the output signal.
Inventors:
Terada, Jun
Application Number:
JP2000017457A
Publication Date:
April 26, 2004
Filing Date:
January 26, 2000
Export Citation:
Assignee:
NIPPON TELEGR & TELEPH CORP <NTT>
International Classes:
H03H17/04; H03M3/02; (IPC1-7): H03M3/02; H03H17/04
Attorney, Agent or Firm:
和泉 良彦 （外１名）