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US 8,810,281 B2Granted
Sense amplifiers including bias circuits
AssigneeMicron Technology, Inc.
InventorSeong-Hoon Lee
Life of this patent
Estimating the term…
Abstract
Sense amplifiers including bias circuits are described. Examples include bias circuits having an adjustable width transistor. A loop gain of the bias circuit may be determined in part by the adjustable width of the transistor. Examples of sense amplifiers including amplifier stages configured to bias an input/output node to a reference voltage.
Claims25
A sense amplifier, comprising
- a bias circuit including an adjustable transistor, wherein the adjustable transistor includes a dimension that is adjustable, wherein the bias circuit is configured to provide a bias voltage having a magnitude that is based, at least in part, on a size of the dimension of the adjustable transistor and is configured to maintain a substantially constant loop gain;
- and
- an amplifier stage coupled to the bias circuit to receive the bias voltage and configured to bias an input-output node to a reference voltage, the amplifier stage having a loop gain controlled at least in part by the bias voltage.
A circuit for calibrating a width of a transistor, the circuit comprising:
- a signal driver configured to provide a differential current;
- an amplifier stage configured to receive the differential current and provide a differential voltage responsive to the differential current;
- a bias circuit coupled to the amplifier stage and configured to provide a bias voltage to the amplifier stage, wherein the bias voltage is configured for substantially constant loop gain, wherein the bias circuit includes an adjustable width transistor;
- logic coupled to the bias circuit and configured to adjust a width of the transistor based, at least in part, on the differential voltage.
1 more element
A sense amplifier, comprising
- a bias circuit including an adjustable transistor, wherein the adjustable transistor includes a dimension that is adjustable, wherein the bias circuit is configured to provide a bias voltage having a magnitude based, at least in part, on a size of the dimension of the adjustable transistor and configured to maintain a constant loop gain;
- and
- an amplifier stage coupled to the bias circuit to receive the bias voltage and having a loop gain controlled, at least in part, by the bias voltage.
Dependencies are inferred from the claim text.