Junus2012
Advanced Member level 5
- Joined
- Jan 9, 2012
- Messages
- 1,552
- Helped
- 47
- Reputation
- 98
- Reaction score
- 53
- Trophy points
- 1,328
- Location
- Italy
- Activity points
- 15,235
dear all
I have designed a biasing reference current by adding PTAT and CTAT currents together. the result is a biasing current with small temperature coefficient.
However, since both the PTA and CTAT has R in their equations, the total current still depending on the process variation. not like the bandgap reference voltage where no R in the voltage equation
Kindly, there is a process independent biasing current circuit as the case of the bandgap voltage circuit ???
I have designed a biasing reference current by adding PTAT and CTAT currents together. the result is a biasing current with small temperature coefficient.
However, since both the PTA and CTAT has R in their equations, the total current still depending on the process variation. not like the bandgap reference voltage where no R in the voltage equation
Kindly, there is a process independent biasing current circuit as the case of the bandgap voltage circuit ???