Title:
COMPLEX COEFFICIENT MULTIPLIER AND COMPLEX COEFFICIENT FILTER
Document Type and Number:
Japanese Patent JP3522492
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a complex coefficient multiplier and a complex coefficient filter capable of reducing the scale of a circuit without reducing a processing speed by reducing the number of multipliers.
SOLUTION: The multiplier multiplies a complex input signal (x+jy) by a complex coefficient (a+jb). In this case, a multiplier 2 multiplies (x) by (a+b) and a multiplier 4 multiplies (y) by (a-b). On the other hand, an adder 1 adds (x) to (y) and a multiplier 3 multiplies (x+y) by (b). An adder 5 calculates a difference between outputs from the multipliers 2, 3 and outputs the real part value pR of a complex output signal. An adder 6 calculates the sum of outputs from the multipliers 2, 3 and outputs the imaginary part value pI of the complex output signal.
Inventors:
Shu, Nagaaki
Shu, Teruhei
Kotobuki, Kokuriyou
Shu, Teruhei
Kotobuki, Kokuriyou
Application Number:
JP12280397A
Publication Date:
April 26, 2004
Filing Date:
April 28, 1997
Export Citation:
Assignee:
YOZAN:KK
International Classes:
G06F17/10; G06F17/16; G06G7/22; H03F1/34; H03H15/00; H03H17/02; (IPC1-7): G06G7/22; G06F17/16; H03H17/02
Attorney, Agent or Firm:
高橋 英生 （外１名）