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Internet Message Format  |  1992-11-14  |  837 b 
  1. Path: sparky!uunet!think.com!ames!agate!usenet.ins.cwru.edu!cleveland.Freenet.Edu!ah335
  2. From: ah335@cleveland.Freenet.Edu (Richard Banks)
  3. Newsgroups: sci.electronics
  4. Subject: calculating bandwidth for op amps
  5. Date: 13 Nov 1992 17:35:33 GMT
  6. Organization: Case Western Reserve University, Cleveland, OH (USA)
  7. Lines: 19
  8. Message-ID: <1e0p15INNf3n@usenet.INS.CWRU.Edu>
  9. Reply-To: ah335@cleveland.Freenet.Edu (Richard Banks)
  10. NNTP-Posting-Host: slc10.ins.cwru.edu
  11.  
  12.  
  13.  
  14. I need some general formulas for calculating the overall signal
  15. bandwidth of chained op amps.
  16.  
  17. The only formula I have now is:
  18.  
  19. 'f_A = f_t/(1 + R_2/R_1)
  20.  
  21. Where f_t= a_0(f_a)
  22.  
  23. a_0 = dc gain
  24. f_a = frequency repsonse of the open-loop response
  25.  
  26. And R_2 and R_1 are the resistors of the standard nonverting op amp
  27. configuration.
  28.  
  29. Does anyone have anything simpler than this?
  30. Thanks.
  31.