JPH0214074U - - Google Patents
Info
- Publication number
- JPH0214074U JPH0214074U JP9316488U JP9316488U JPH0214074U JP H0214074 U JPH0214074 U JP H0214074U JP 9316488 U JP9316488 U JP 9316488U JP 9316488 U JP9316488 U JP 9316488U JP H0214074 U JPH0214074 U JP H0214074U
- Authority
- JP
- Japan
- Prior art keywords
- amplitude
- complex quantity
- section
- computes
- calculation unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Complex Calculations (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
第１図は本考案に係るＦＦＴアナライザの一実
施例を示すブロツク図、第２図はその振幅位相演
算部の構成を示すブロツク図、第３図は従来のＦ
ＦＴアナライザの構成を示すブロツク図、第４図
はその振幅位相演算部の構成を示すブロツク図で
ある。
１……フーリエ変換部、２……サインテーブル
、５，６……２乗演算部、７……加算部、８……
開平部、９……除算部、１１……符号演算部、２
０……振幅位相演算部、２１……アークサイン演
算部。
FIG. 1 is a block diagram showing an embodiment of the FFT analyzer according to the present invention, FIG. 2 is a block diagram showing the configuration of its amplitude and phase calculating section, and FIG.
FIG. 4 is a block diagram showing the structure of the FT analyzer, and FIG. 4 is a block diagram showing the structure of its amplitude and phase calculating section. 1...Fourier transform section, 2...Sine table, 5, 6...Square operation section, 7...Addition section, 8...
square root part, 9... division part, 11... sign operation part, 2
0... Amplitude phase calculation section, 21... Arcsine calculation section.
Claims (1)
応する複素量を求めるフーリエ変換部と、この複
素量の振幅を求める振幅演算部と、前記複素量の
虚部とこの振幅との比を求める除算部と、この除
算部の出力が入力されるアークサイン演算部とを
有し、このアークサイン演算部により前記複素量
の位相を求める事を特徴とするＦＦＴアナライザ
。 A Fourier transform section that Fourier transforms an input signal to obtain a complex quantity corresponding to each frequency component; an amplitude calculation section that computes the amplitude of this complex quantity; and a division section that computes the ratio between the imaginary part of the complex quantity and this amplitude. and an arcsine calculation unit to which the output of the division unit is input, and the arcsine calculation unit determines the phase of the complex quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9316488U JPH0725717Y2 (en) | 1988-07-14 | 1988-07-14 | FFT analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9316488U JPH0725717Y2 (en) | 1988-07-14 | 1988-07-14 | FFT analyzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0214074U true JPH0214074U (en) | 1990-01-29 |
| JPH0725717Y2 JPH0725717Y2 (en) | 1995-06-07 |
Family
ID=31317613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9316488U Expired - Lifetime JPH0725717Y2 (en) | 1988-07-14 | 1988-07-14 | FFT analyzer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0725717Y2 (en) |
-
1988
- 1988-07-14 JP JP9316488U patent/JPH0725717Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0725717Y2 (en) | 1995-06-07 |
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