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US 12,034,412 B2Granted
Differential amplifier compensation
AssigneeTexas Instruments Incorporated
InventorJoseph Sankman
Life of this patent
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Abstract
An amplifier includes a first stage and a second stage. The first stage includes a first output and a second output. The second stage includes an output, a first transistor and a second transistor. The first transistor includes a drain coupled to the first output of the first stage, and a source coupled to the output of the second stage. The second transistor includes a drain coupled to the second output of the first stage, and a gate coupled to the output of the second stage.
Claims20
An amplifier, comprising:
- a first stage including a first output, and a second output;
- a second stage, including:
- an output;
- a first transistor including:
- a drain coupled to the first output of the first stage;
- and
- a source coupled to the output of the second stage;
- and
- a second transistor including:
- a drain coupled to the second output of the first stage;
- and
- a gate coupled to the output of the second stage.
9 more elements
An amplifier, comprising:
- a first stage including differential inputs and differential outputs;
- and
- a second stage including:
- a single-ended output coupled to one of the differential inputs;
- a first output transistor configured to source current to the single-ended output;
- a second output transistor configured to sink current from the single-ended output;
- a third transistor coupled to a first of the differential outputs, and configured to drive the first output transistor;
- a fourth transistor coupled to a second of the differential outputs, and configured to drive the second output transistor;
- and
- a compensation network coupled to the single-ended output, the third transistor, and the fourth transistor, and configured to:
- compensate the third transistor and the fourth transistor based on a signal at the single-ended output.
8 more elements
An analog-to-digital conversion circuit, comprising:
- an analog-to-digital converter;
- and
- a voltage reference coupled to the analog-to-digital converter, the voltage reference including:
- a reference voltage circuit;
- and
- an amplifier coupled between the reference voltage circuit and the analog-to-digital converter, the amplifier including:
- a first stage including differential outputs and differential inputs, a first of the differential inputs coupled to the reference voltage circuit;
- and
- a second stage including:
- a single-ended output coupled to a second of the differential inputs;
- a first output transistor configured to source current to the single-ended output;
- a second output transistor configured to sink current from the single-ended output;
- a third transistor coupled to a first of the differential outputs, and configured to drive the first output transistor;
- a fourth transistor coupled to a second of the differential outputs, and configured to drive the second output transistor;
- and
- a compensation network coupled to the single-ended output, the third transistor, and the fourth transistor, and configured to:
- compensate the third transistor and the fourth transistor based on a signal at the single-ended output.
14 more elements
Dependencies are inferred from the claim text.