Back to results
US 2022/0094307 A1Published application
Amplifier circuit
AssigneeAms AG
InventorsCarlo FIOCCHI, Andreas FITZI, Andras MOZSARY
Life of this patent
Estimating the term…
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.
Claims17
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.
3 more elements
The amplifier circuit according to 3, wherein the loop amplifier comprises a class AB stage, the class AB stage including:
- a first transistor connected in series with the first resistor and a second transistor connected in series with the second resistor;
- a buffer transistor having a source terminal connected to a circuit node coupled between the first and second transistors of the circuit path and having a drain terminal connected to the control terminal of one of the first and second transistors of the class AB stage;
- and
- complementary transistors connected between the control terminals of the first and second transistors, the complementary transistors controlled by reference potentials.
1 more element
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.