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Thanks a lot for replay , but the problem with me that : I need another frequency ( I mean that the frequency is not 1.7KHz) as in the example which I found it, and I design the filter as f=1/(2πRC) ; this done ; but RF I remain it as its value in the example which equal to 5.1K ohm , after that...
Sure ,In the wikipedia link you find the circuit as well as in this PDF explanation the design as example, in PDF the example circuit is worked exactly 90 degree pahse shift & unity gain .
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Hi FvM ,
please i found the example in PDF which i told you previously , and I run...
where are the contradictions ??!!!! ,,,,,,,,,,, i need phase shifter circuit with output amplitude as the same amplitude of input signal
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ahha ,,,,, the input wave form is sine wave and I mean the exchange between R and C gives not exactly phase shift which I need...
yes this which i need A 90 deg phase shift with a constant amplitude for a certain frequency band ,,,,,,,,, thanks :)
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I mean that gives no phase shift as in picture
and the correct result which i need it is A +90 degrees phase shift with a constant amplitude at...
ahaaa ,,,,,,,,,,,, Thanks a lot for replay , but the phase shifter is one of a large circuit diagram ,,,,,, and i must to minimize the ICs and circuits as i can ,,,,,, thanks a lot :)
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I simulated it in many program and gives the same result -90 degree phase shift , and if...
firstly thanks for your replay :) ,,,,,,,, but in the wikipedia link the phase shift circuit was -90 degrees phase shift at output as in attached picture ,,,,,,,,, and this mean i need second phase shift ???!!! ,,,,,,,,,,,, I need to enter sine wave to give me at output cosine wave , thanks .
Thanks all for replay , I would the circuit work at specific frequency " the frequency is fixed not variable " ,,,,,, general circuit design with there equation to complete my design ,,,,that's what i need ????
hello all ,
please I need to design 90 degrees phase shift circuit for a sine wave input , but the amplitude of output nearly the same amplitude of input signal , Please i need the typical circuit of these specification .
hi
i want to ask about how to connect a serial port to a modem ,
i have a project and i will use a modem to send a message to a phone using H6221-CGH GPRS modem.
the problem is that i did what the company told me about installing the modem but how can i test the modem in sending messages to a...
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