Patent ID: 9654092
Date: 2017-05-16
CPC Classifications: H03K

Claim:
1. A gain stage, comprising: a first current source having an input coupled to a digital supply voltage and having an output providing a first current level to a first bias node; a second current source having an input coupled to said digital supply voltage and having an output providing a second current level to a source node; a first transistor of a first conductivity type having current terminals coupled between said source node and a first output node, and having a control terminal coupled to a first input node; a second transistor of said first conductivity type having current terminals coupled between said source node and a second output node, and having a control terminal coupled to a second input node; a first transistor of a second conductivity type having current terminals coupled between said first bias node and a reference supply voltage, and having a control terminal coupled to said first bias node; a second transistor of said second conductivity type having current terminals coupled between said first output node and said reference supply voltage, and having a control terminal coupled to said first bias node; a third transistor of said second conductivity type having current terminals coupled between said second output node and said reference supply voltage, and having a control terminal coupled to said first bias node; a fourth transistor of said second conductivity type having current terminals coupled between said second output node and a common node, and having a control terminal coupled to said first output node; a fifth transistor of said second conductivity type having current terminals coupled between said first output node and said common node, and having a control terminal coupled to said second output node; and a sixth transistor of said second conductivity type having current terminals coupled between said common node and said reference supply voltage, and having a control terminal coupled to said first bias node.