ICdesignerbeginner
Member level 5
Hi
I want to ask can i apply a low voltage to the bulk as compare to the source in bulk driven PMOS transistors because in bulk driven PMOS the inputs are applied to the bulk i.e DC +ac signal. The DC common mode voltage is low 100mV. Source at 300mV but the problem is the parasitic diodes are getting forward bias at this voltage.
If I apply high voltage at the bulk let say 400mV i.e. greater than the source which is 300mV to make the parasitic diodes reverse biased.then the theory of low voltage operation for bulk driven is not valid because applying 0.4 at bulk or at the gate are the same. In both cases we have to apply 0.4V then how this bulk driven is said to be used for low voltage
I want to ask can i apply a low voltage to the bulk as compare to the source in bulk driven PMOS transistors because in bulk driven PMOS the inputs are applied to the bulk i.e DC +ac signal. The DC common mode voltage is low 100mV. Source at 300mV but the problem is the parasitic diodes are getting forward bias at this voltage.
If I apply high voltage at the bulk let say 400mV i.e. greater than the source which is 300mV to make the parasitic diodes reverse biased.then the theory of low voltage operation for bulk driven is not valid because applying 0.4 at bulk or at the gate are the same. In both cases we have to apply 0.4V then how this bulk driven is said to be used for low voltage