Current mirror with BJT.
The insertion of more mirrors will affect the collector current in the reference transistor (transistor working as a diode) because more current will be drained by the N bases. Change the switches to see the difference in the collector current and base current.
Iref = (Vcc - Vbe)/R
- Iref: current in the resistor of 10k
Iref = Ic0(1 + (N+1)/Bcc)
where
- Ic0: collector current
- N: number of transistor
Ps.: consider all transistor equals