r-care Posted September 19, 2006 Report Share Posted September 19, 2006 im studying at a university... i was given a task to build a mini project entitled "two decade bjt opamp cascade inverting voltage aplifier"... please help me, i have no idea what to do ??? Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 19, 2006 Report Share Posted September 19, 2006 Did you study any electronics in high school or in university?Ask your teacher to explain more details about the project:1) Two decades of what- frequency?2) Cascaded what- bjt's or opamps?3) Is an "aplifier" an amplifier? Quote Link to comment Share on other sites More sharing options...
r-care Posted September 20, 2006 Author Report Share Posted September 20, 2006 actually, the spect given was 200Hz at low frequency and 20KHz at high frequency for the OPAMP. Yup, it is amplifier. they want the circuit to be cascaded connection . (BJT with 741 OPAMP) Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 20, 2006 Report Share Posted September 20, 2006 Then make a highpass filter circuit with a cutoff frequency of 200Hz, followed by (cascaded) a lowpass filter with a cutoff frequency of 20kHz. Make the circuits with BJT's, old 741 opamps or both. Quote Link to comment Share on other sites More sharing options...
SatthisCy Posted September 21, 2006 Report Share Posted September 21, 2006 Hello,r-care, my mini-project in univercity was a "4-band audio equalizer" and i used over 8 OPAMP's to do it. i studed very hard i feel able to help u.just give info about:the order of the filter (1st, 2nd,....,6th)?is it a band-pass filter?do you have to use Bjt's or is it optional?what about gain?Thanks. Quote Link to comment Share on other sites More sharing options...
r-care Posted September 25, 2006 Author Report Share Posted September 25, 2006 i have to use the BJT. i quite forgot wheter it is band-pass or not. my partnet have all the datas.i should get the voltage gain about -500. Quote Link to comment Share on other sites More sharing options...
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