Is it possible to amplify AC signal with In Amp in Single Supply, however, with a sufficient reference to 'compensate' the negative part of the signal?
I believe that a in amp with a single supply, for example 5V and GND, can not amplify negative signals because the power is not symmetrical. Right? Or not?
My point is:
If I add a reference (Pin 5) that makes the signal completely positive, is it possible to amplify this signal? Having as a result a fully positive amplified signal?
I'm using a in amp (INA118) with single supply (GND on pin 4 and 5V on pin 7) with gain equal to 2 (Rg = 50KOhm). On reference pin 5 I'm adding + 2.5V (Vdd / 2).
In my project, I need to inject a 1mA electric current into the patient's body through 2 electrodes, receive this signal through 2 other electrodes, and amplify this signal. Like This. The sine is a sinusoid of 1.98V pp and 1mA (With a frequency sweep from 1KHz to 100KHz) with the voltage ranging from -0.99V to +0.99V. The Schematic is like this.