Hello to all.
I have the following problem in my circuit.
A transducer with a high output impendance is connected into a high input amplifier which is connected to an absolute value circuit....all on a perforated board.
The transducer's input voltage ranges from 100mv to 6 Volts, lets say...
YET there is a noticable 50Hz noise in the circuit (120mV), that exists even when the transducer is unpluged from the circuit.
Considering all the components are on a perforated board, and that the IC used for the HII amplifier is CMOS technology, what could be the main cause of the problem and how can I eliminate it??
For instance, would metallic shielding be used to entirely solve the problem, or there is something else in the picture I am missing??
Thanx in advance,
xmat.
I have the following problem in my circuit.
A transducer with a high output impendance is connected into a high input amplifier which is connected to an absolute value circuit....all on a perforated board.
The transducer's input voltage ranges from 100mv to 6 Volts, lets say...
YET there is a noticable 50Hz noise in the circuit (120mV), that exists even when the transducer is unpluged from the circuit.
Considering all the components are on a perforated board, and that the IC used for the HII amplifier is CMOS technology, what could be the main cause of the problem and how can I eliminate it??
For instance, would metallic shielding be used to entirely solve the problem, or there is something else in the picture I am missing??
Thanx in advance,
xmat.