Calculate RB on NPN

@diego92

11 years ago

https://everycircuit.com/circuit/4804502798467072

hFE=200 ; VT=9 V; VCC=15 V; RC=1,5 K ;Vbe=0,6v RESULT. IC= 15v-9v=6 V/1500= 4mA IB= IC/hFE=4 mA/200= 20uA RB= Vcc-Vbe= 15v-0,6v=14,4/20uA= 720K ohms.