It would a great pleasure for if any body explain me working of attached circuit .
Attachments
-
68.5 KB Views: 61
-
50.6 KB Views: 52
Of course using a MOSFET in place of the BJT will eliminate that source of error (if that error is important to the constant-current accuracy requirement).Because the transistor base current also goes through the emitter resistor, there is an error term equal to 1 / the transistor current gain.
Thank you so much.Both circuits are what is called a transconductance amplifier, where the output current is directly proportional to the input voltage.
Iout = Vin / R9 or R16
Because the transistor base current also goes through the emitter resistor, there is an error term equal to 1 / the transistor current gain.
ak
How the op amp works?Thank you so much.
Is LED in always ON state.
How opamp works.
by Jake Hertz
by Aaron Carman
by Duane Benson