Low power operational transconductance amplifier
AssigneeQUALCOMM Incorporated
InventorQubo ZHOU
Life of this patent
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Abstract
A method and an apparatus relating to an amplifier (e.g., an operational transconductance amplifier or OTA) are provided. The OTA includes a first node and a second node. The OTA further includes a differential transistor pair for receiving an input. The differential transistor pair is coupled to the first node and the second node. The OTA includes a pair of output nodes for outputting a response to the input. The response at the pair of output nodes includes a first frequency pole. A capacitive element is coupled between the first node and the second node. The response includes a second frequency pole based on the capacitive element. The second frequency pole is at a greater frequency than the first frequency pole.
Claims26
An operational transconductance amplifier (OTA), comprising:
- a first node and a second node;
- a differential transistor pair for receiving a differential input, wherein the differential transistor pair is coupled to the first node and the second node;
- a pair of output nodes for outputting a response to the differential input, wherein the response at the pair of output nodes comprises a first frequency pole;
- a capacitive element coupled between the first node and the second node, wherein the response includes a second frequency pole, the second frequency pole being a function of the capacitive element, and wherein the second frequency pole is at a greater frequency than the first frequency pole.
A method for an operational transconductance amplifier (OTA), comprising:
- receiving a differential input at a differential transistor pair;
- flowing currents through a pair of output nodes, wherein a capacitive element is coupled to the pair of output nodes;
- and
- outputting, at the pair of output nodes, a response having a first frequency pole and a second frequency pole, the second frequency pole being a function of the capacitive element, and wherein the second frequency pole is at a greater frequency than the first frequency pole.
An operational transconductance amplifier (OTA), comprising:
- means for receiving a differential input at a differential transistor pair;
- means for flowing currents through a pair of output nodes, wherein a capacitive element is coupled to the pair of output nodes;
- and
- means for outputting, at the pair of output nodes, a response having a first frequency pole and a second frequency pole, the second frequency pole being a function of the capacitive element, and wherein the second frequency pole is at a greater frequency than the first frequency pole.
Dependencies are inferred from the claim text.