Differential two-stage miller compensated amplifier system with capacitive level shifting
AssigneeAnalog Devices, Inc.
InventorsDaniel Kelly, Steven Decker, Stephen Kosic
Life of this patent
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Abstract
A differential two-stage Miller compensated amplifier system with capacitive level shifting includes a first stage differential transconductance amplifier including first and second output nodes and an output common mode voltage, a second stage differential transconductance amplifier including non-inverting and inverting inputs and outputs and an input common mode voltage, and a level shifting capacitor circuit coupled between the first and second output nodes and the non-inverting and inverting inputs for level shifting between the output common mode voltage of the first stage and the input common mode voltage of the second stage.
Claims15
A differential two-stage Miller compensated amplifier system with capacitive level shifting comprising:
- a first stage differential transconductance amplifier including first and second output nodes and an output common mode voltage;
- a second stage differential transconductance amplifier including non-inverting and inverting inputs and outputs and an input common mode voltage;
- and
- a level shifting capacitor circuit coupled between said first and second output nodes and said non-inverting and inverting inputs for level shifting between said output common mode voltage of said first stage and said input common mode voltage of said second stage.
A differential two-stage Miller compensated amplifier system with capacitive level shifting comprising:
- a first stage differential transconductance amplifier having a first output node and a second output node and having an output common mode voltage;
- a second stage differential transconductance amplifier having a non-inverting input and an inverting input and an inverting output in a non-inverting output and have an input common mode voltage;
- a first Miller compensation capacitor coupled between said inverting output and said first node;
- a second Miller compensation capacitor coupled between said non-inverting output and said second node;
- a first level shifting capacitor coupled between said first output node and said non-inverting input charged to a first predetermined voltage;
- a second level shifting capacitor coupled between said second output node and said inverting input charged to a second predetermined voltage;
- and
- wherein said first and second level shifting capacitors level shift between said output common mode voltage and said input common mode voltage.
Dependencies are inferred from the claim text.