Back to results
US 2023/0051462 A1Published application
Differential amplifier common mode voltage
OwnerJoseph Alan SANKMANinventor
Life of this patent
Estimating the term…
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 a first transistor, a second transistor, and a common-mode circuit. The first transistor includes a drain coupled to the first output of the first stage. The second transistor includes a drain coupled to the second output of the first stage. The common-mode circuit includes a reversible current mirror circuit coupled to the drain of the first transistor and the drain of the second transistor.
Claims20
An amplifier, comprising:
- a first stage including a first output, and a second output;
- and
- a second stage, including:
- a first transistor including:
- a drain coupled to the first output of the first stage;
- a second transistor including:
- a drain coupled to the second output of the first stage;
- and
- a common-mode circuit coupled to the drain of the first transistor and the drain of the second transistor, the common-mode circuit including a reversible current mirror circuit.
6 more elements
An amplifier, comprising:
- a first stage including differential inputs and differential outputs;
- a second stage including:
- a single-ended output coupled to one of the differential inputs;
- a first transistor configured to source current to the single-ended output;
- a second transistor configured to sink current from the single-ended output;
- a third transistor including a drain coupled to a first of the differential outputs, and configured to drive the first transistor;
- a fourth transistor including a drain coupled to a second of the differential outputs, and configured to drive the second transistor;
- and
- a common-mode circuit coupled to the drain of the third transistor and the drain of the fourth transistor, the common-mode circuit including a reversible current mirror circuit configured to generate a common mode voltage at the drain of the third transistor and the drain of the fourth transistor.
6 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 transistor configured to source current to the single-ended output;
- a second transistor configured to sink current from the single-ended output;
- a third transistor including a drain coupled to a first of the differential outputs, and configured to drive the first transistor;
- a fourth transistor including a drain coupled to a second of the differential outputs, and configured to drive the second transistor;
- and
- a common-mode circuit coupled to the drain of the third transistor, and the drain of the fourth transistor, the common-mode circuit including a reversible current mirror circuit configured to generate a common mode voltage at the drain of the third transistor and the drain of the fourth transistor.
13 more elements
Dependencies are inferred from the claim text.