Back to results
US 10,312,869 B2Granted
Methods and devices relating to high gain amplifiers
AssigneeThe Royal Institution for the Advancement of Learning/Mcgill University
InventorsGordon Roberts, Ming Yang
Life of this patent
Estimating the term…
Abstract
There is described herein methods and devices for high DC gain closed loop operation amplifiers exploiting cascaded low gain stages and a controller-based compensation circuit for stability.
Claims20
An amplifier circuit comprising:
- a plurality of cascaded circuit elements arranged in a closed-loop topology, the closed-loop topology comprising a plurality of gain stages defined by the cascaded circuit elements;
- and
- a controller provided in the closed-loop topology, the plurality of cascaded circuit elements and the controller together implementing an open-loop transfer function composed of an amplifier function and a remainder function, the gain stages corresponding to the amplifier function and the controller configured to implement the remainder function.
A method for providing an amplifier circuit, the method comprising:
- selecting a closed-loop transfer function for the amplifier circuit, the closed-loop transfer function having a corresponding open-loop transfer function composed of an amplifier function and a remainder function;
- determining a closed-loop topology for a plurality of cascaded circuit elements and a controller, the cascaded circuit elements defining a plurality of gain stages that correspond to the amplifier function of the open-loop transfer function;
- and
- configuring the controller to implement the remainder function of the open-loop transfer function.
1 more element
Dependencies are inferred from the claim text.