Timeline for What's the need to set the amplifier input common mode voltage to mid–supply voltage in this non-inverting microphone pre-amplifier circuit?
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
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| Nov 27, 2022 at 21:27 | comment | added | Audioguru | C2 is a dead short at audio frequencies therefore the audio gain is 10k/787 ohms (plus 1)= 13.7 times. | |
| Nov 26, 2022 at 20:32 | comment | added | Scipio | So i added an offset of 5 volts to the input signal and placed a capacitor right next to it and everything works as it should, the signal came out centered at 2.5V.... I just dont understand why it didnt work before, if i did superposition in node Vin i should get 2.5V + the sine wave? Also, how does C2 affect the gain? in equation (7) there's no C2 | |
| Nov 26, 2022 at 20:00 | history | answered | Audioguru | CC BY-SA 4.0 |