Patent ID: 7965123

Claim:
A circuit comprising: an input lead configured to receive an input signal; a first transistor and a second transistor, wherein the first transistor and the second transistor are coupled between a first voltage supply lead and a second voltage supply lead; a third transistor and a fourth transistor, wherein the third transistor and the fourth transistor are coupled between the first voltage supply lead and the second voltage supply lead, wherein: a control lead of the third transistor is coupled to a first node between the first transistor and the second transistor; a control lead of the first transistor is coupled to a second node between the third transistor and the fourth transistor; the second transistor turns on in response to the input signal transitioning from a first level to a second level; and the fourth transistor turns on in response to the input signal transitioning from the second level to the first level; a first charge source circuit coupled to the control lead of the third transistor, the first charge source circuit configured to provide a first charge to turn off the third transistor in response to the input signal transitioning from the second level to the first level; and a second charge source circuit coupled to the control lead of the first transistor, the second charge source circuit configured to provide a second charge to turn off the first transistor in response to the input signal transitioning from the first level to the second level.