hayowazzup
Advanced Member level 4
Hi,
I don't quite understand how the circuits below work, hope anyone there could help me out.
For the current source diagram anyone know how the diodes and R1 work as a voltage reference? As I don't understand whats the purpose of havnig R1 and thought that the current source cannot provide a constant current since if the Vcc varies Base Voltage will also be varied.
for me the current sink circuit looks easier to understand as the Base Voltage here will remain constant (2*Vd) as Vcc changes.
I don't quite understand how the circuits below work, hope anyone there could help me out.
For the current source diagram anyone know how the diodes and R1 work as a voltage reference? As I don't understand whats the purpose of havnig R1 and thought that the current source cannot provide a constant current since if the Vcc varies Base Voltage will also be varied.
for me the current sink circuit looks easier to understand as the Base Voltage here will remain constant (2*Vd) as Vcc changes.