Back to results
US 2022/0190797 A1Published application
Chopper amplifier circuits and method for operating chopper amplifier circuits
AssigneeInfineon Technologies AG
InventorsMario MOTZ, Yongjia LI, Andrei-George ROMAN, Dragos VOCUREK
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to chopper amplifier circuits featuring inherent chopper ripple suppression.
Claims18
A chopper amplifier circuit, comprising
- a modulator circuit tuned to a chopper frequency, is the modulator circuit being configured, in accordance with the chopper frequency, to convert a voltage into an AC voltage;
- an amplifier circuit having an inverting input and a non-inverting input for the AC voltage, and having an inverting output and a non-inverting output for an amplified AC measuring voltage;
- a demodulator circuit tuned to the chopper frequency, is the demodulator circuit being configured to convert the amplified AC voltage into an amplified DC voltage,
- wherein the demodulator circuit is configured:
- during different switching phases, to couple each of the inverting and non-inverting outputs of the amplifier circuit, both directly and capacitively, to each inverting and non-inverting input of a summing circuit.
2 more elements
A method for operating a chopper amplifier circuit comprising, during different switching phases:
- the coupling of an inverting output of an operational amplifier of the chopper amplifier circuit and of a non-inverting output of the operational amplifier of the chopper amplifier circuit, both directly and capacitively, to each inverting input of a summing circuit and to each non-inverting input of the summing circuit.
18-36. (canceled)
Dependencies are inferred from the claim text.