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US 11,742,803 B2Granted
Amplifier circuit
AssigneeAms AG
InventorsCarlo Fiocchi, Andreas Fitzi, Andras Mozsary
Life of this patent
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Abstract
An amplifier circuit includes a circuit path of serially connected complementary type transistors. First and second feedback loops include a loop amplifier, the transistors of the circuit path and a corresponding resistor.
Claims15
An amplifier circuit, comprising:
- a circuit path including a first transistor and a second transistor, the first and second transistors coupled in series and being of complementary type;
- an input terminal operable to receive an input signal, the input terminal connected to control terminals of the first and second transistors;
- a loop amplifier having an input terminal connected to a node disposed between the first and second transistors and having a first and a second complementary output terminal;
- a first feedback loop including the first transistor, the loop amplifier and a first resistor connected to the first output terminal of the loop amplifier;
- a second feedback loop including the second transistor, the loop amplifier and a second resistor connected to the second output terminal of the loop amplifier;
- a third resistor connected to the first resistor and a fourth resistor connected to the second resistor;
- wherein the first and third resistors and the second and fourth resistors each form a voltage divider;
- and
- wherein the voltage divider of the first and third resistors and the voltage divider of the second and fourth resistors are ohmic voltage dividers.
6 more elements
A sensor arrangement, comprising:
- a sensor configured to provide a differential signal dependent on an ambient condition;
- and
- an amplifier circuit comprising:
- a circuit path including a first transistor and a second transistor, the first and second transistors coupled in series and being of complementary type;
- an input terminal operable to receive an input signal, the input terminal connected to control terminals of the first and second transistors;
- a loop amplifier having an input terminal connected to a node disposed between the first and second transistors and having a first and a second complementary output terminal;
- a first feedback loop including the first transistor, the loop amplifier and a first resistor connected to the first output terminal of the loop amplifier;
- a second feedback loop including the second transistor, the loop amplifier and a second resistor connected to the second output terminal of the loop amplifier;
- a third resistor connected to the first resistor and a fourth resistor connected to the second resistor,
- wherein the amplifier circuit is configured to receive the differential signal and configured to output an amplified signal of reduced noise.
7 more elements
Dependencies are inferred from the claim text.