Patent ID: 7782111

Claim:
A pulse generator, comprising: a differential pair of transistors coupled between a first node and a second node, wherein a first one of the transistors in the pair has its gate driven by a voltage Vip that transitions periodically between a power supply voltage and ground and wherein a remaining one of the transistors has its gate driven by a voltage Vin that is complementary to voltage Vip; a current source that biases a current that flows between the first and second nodes; and a third transistor coupled between the current source and the second node, wherein the third transistor is matched to the differential pair of transistors and driven by a level-shifted version of Vip, whereby as Vip is periodically brought low, a voltage pulse occurs at the first and second nodes, and whereby as Vin is periodically brought low, a voltage pulse also occurs at the first and second nodes.