Patent ID: 7990188
Filing Date: 2011-08-02
Classification: H03M

Abstract:
1. An apparatus comprising: a first output node; a second output node; a first supply rail; a second supply rail a first current source that is coupled to the first supply rail; a second current source that is coupled to the second supply rail; a first differential pair that receives a clock signal and that is coupled to the first output node, the second output node, and the first current source; a second differential pair that receives the clock signal and that is coupled to the first output node, the second output node, and the second current source; a first clamp that is coupled to between the first and second current sources, that is coupled to the first output node, and that is adapted to receive a low clamping voltage and a high clamping voltage; and a second clamp that is coupled to between the first and second current sources, that is coupled to the second output node, and that is adapted to receive the low clamping voltage and the high clamping voltage.