Patent ID: 7256725
Filing Date: 2007-08-14
Classification: H03F,H03K,H03M

Abstract:
1. An autozero amplifier comprising: a positive input terminal; a negative input terminal; a first capacitor connected to said positive input terminal; a second capacitor connected to said negative input terminal; a first pair of transistors with their corresponding drains connected to the first capacitor at a common node wherein the source of a first transistor of said first pair of transistors is connected to a positive threshold voltage, the source of a second of said first pair of transistors is connected to a positive voltage terminal of a resistor ladder, and the gates said first pair of transistors are connected to a non-overlapping two-phase clock; and a second pair of transistors with their drains connected to the second capacitor at a common node wherein the source of a first of said second pair of transistors is connected to a negative threshold voltage, the source of a second of said second pair of transistors is connected to a negative voltage terminal of said resistor ladder, and the gates said second pair of transistors are connected to said non-overlapping two-phase clock.