Junus2012
Advanced Member level 5
Hello,
The PTAT beta multiplier current source is serving my purpose for biasing my amplifier. The temperature behavioural of the biasing current is well compensating the variation of the opamp under the change of temperature.
However, with the slow process corner, the opamp bandwidth goes down, and in order to compensate it I need to increase the biasing current. On the other hand, the current of the biasing circuit is minimum at the slow corner, so what I need is a circuit that works opposite to the process corner with regards to the biasing circuit, that is at the slow corner the biasing current becomes maximum and at the fast corner, the current will be minimum. In either cases the current should have PTAT properties.
Thank you in advance for your help
Regards
The PTAT beta multiplier current source is serving my purpose for biasing my amplifier. The temperature behavioural of the biasing current is well compensating the variation of the opamp under the change of temperature.
However, with the slow process corner, the opamp bandwidth goes down, and in order to compensate it I need to increase the biasing current. On the other hand, the current of the biasing circuit is minimum at the slow corner, so what I need is a circuit that works opposite to the process corner with regards to the biasing circuit, that is at the slow corner the biasing current becomes maximum and at the fast corner, the current will be minimum. In either cases the current should have PTAT properties.
Thank you in advance for your help
Regards