Patent ID: 8610478
Filing Date: 2013-12-17
Classification: H03K

Abstract:
1. A differential delay cell having a pair of input nodes and a pair of output nodes, the differential delay cell comprising: a pair of current source transistors, each with a drain terminal connected to a different one of the output nodes; at least one swing limiting transistor connected between the drain terminals of the current source transistors; and a resistor-capacitor (RC) filter connected to source terminals of the current source transistors and a gate terminal of the at least one swing limiting transistor for supplying a reduced power supply voltage thereto, wherein the RC filter further comprises a native follower device and an additional capacitor coupled between a source terminal of the native follower device and ground, and wherein the native follower device comprises (i) a gate terminal coupled for receiving a filtered power supply voltage from a resistor of the RC filter and a capacitor of the RC filter.