i have some doubts....i dont know where to ask this..so any one plz help me...may be crazy doubts...plz help me....
1)why there in world only analog and digital signals ...is there any other signals?..plz clarify...?
2) what is input impedance?how it will come?
3) any electronic system have gain plot and phase plot...in that gain plots gives the information about staticts of the gain weather it improved or not...but coming to phase plot ..usaually we give inputs as analog signlas(mostly sine wave) with some phase and other stuff like amplitude etc..at the output of system... may the phase will increased or same or incresed...MAY BE my explanation was no so good....but i want know abt what is the use of phase plots and what is phase..?
hi ,
thank you Mr. ericgibbs
I have worked these steps , but the trouble is still .
the resistors R10, R11 and R12 I used are 920 K ohms , is this true or they must be 1 M ohm?
hi ,
thank you Mr. ericgibbs
I have worked these steps , but the trouble is still .
the resistors R10, R11 and R12 I used are 920 K ohms , is this true or they must be 1 M ohm?
i have some doubts....i dont know where to ask this..so any one plz help me...may be crazy doubts...plz help me....
1)why there in world only analog and digital signals ...is there any other signals?..plz clarify...?
2) what is input impedance?how it will come?
3) any electronic system have gain plot and phase plot...in that gain plots gives the information about staticts of the gain weather it improved or not...but coming to phase plot ..usaually we give inputs as analog signlas(mostly sine wave) with some phase and other stuff like amplitude etc..at the output of system... may the phase will increased or same or incresed...MAY BE my explanation was no so good....but i want know abt what is the use of phase plots and what is phase..?
This thread is here to discuss Electronics Lover's circuit. I suggest you go back to the main page and under the "General Electronics Chat" click "Create new thread." I'm sure the members of this forum would be happy to help you out.
Good luck!
Der Strom
The circuit is very sensitive. If it is built on a breadboard then the long connecting wires will pickup mains hum.
If the electret mic is not connected with shielded audio cable then its wires will pickup mains hum.
hello Mr.ericgibbs , I have replaced these resistors by 1.5 M ohms , but the trouble is still .
I removed the resistor R11=1M ohm , and when I touch some parts of the circuit like T1 or T2 or some parts , the circuit Works well .
The circuit is very sensitive. If it is built on a breadboard then the long connecting wires will pickup mains hum.
If the electret mic is not connected with shielded audio cable then its wires will pickup mains hum.
thank you Mr.audioguru ,
but can you explain what this meaning "wires will pickup mains hum" ?
and can you get the picture for "shielded audio cable" ?
thanks.
If your home has AC electricity then its fairly high voltage sends "hum" all over the place. wires that are fairly long on electronic circuits that are built on a breadboard pickup the hum with the wires acting like antennas.
can you get the picture for "shielded audio cable"?
ALL audio input signals use shielded audio cable to avoid hum pickup.
A microphone has a very low level signal and a high gain preamp so its connecting wires must use shielded audio cable that is co-axial with a signal wire surrounded with shield wires.