This amplifier for hearing aid was found in a 1968 documentation using an integrated of the time. The power is from a battery, the consumption of 1.65 mA and the power of about to 1 mW.
This circuit utilizes a precision operational amplifier that can be replaced with an equivalent. The...
When we connect the power supply of the circuit shown in the figure the capacitor is discharged and thus...
This circuit has a thermal chamber that acts as a stabilizer, compensating for the ambient...