Chopper circuit for multipath chopper amplifier and corresponding method of chopping

A chopper circuit for a multipath chopper amplifier, comprising:

• a first chopper device in a first circuit path, wherein the first chopper device is configured to be controlled by a first clock signal, which has a first frequency;
• a second chopper device in a second circuit path, parallel to the first circuit path, wherein the second chopper device is configured to be controlled by a second clock signal, which has a second frequency, wherein the first frequency is greater than the second frequency;
• and
• a third chopper device in a third circuit path, wherein the third chopper device is configured to be controlled by a third clock signal, which has a third frequency.

A method of chopping an input signal comprising:

• splitting the input signal so that a first path signal for a first circuit path and a second path signal for a second circuit path are provided, where the second circuit path is parallel with the first circuit path, and wherein the first path signal and the second path signal are the same;
• chopping the first path signal by means of a first chopper device in the first circuit path, wherein the first chopper device is controlled by a first clock signal, which has a first frequency;
• and
• chopping the second path signal by means of a second chopper device in the second circuit path, wherein the second chopper device is controlled by a second clock signal, which has a second frequency, wherein the first frequency is greater than the second frequency.

A method of chopping an input signal comprising:

• splitting the input signal so that a first path signal for a first circuit path, a second path signal for a second circuit path, and a third path signal for a third circuit path are provided;
• chopping the first path signal by means of a first chopper device in the first circuit path, wherein the first chopper device is controlled by a first clock signal, which has a first frequency;
• chopping the second path signal by means of a second chopper device in the second circuit path, wherein the second chopper device is controlled by a second clock signal, which has a second frequency, wherein the first frequency is greater than the second frequency;
• and
• chopping the third path signal by means of a third chopper device in the third circuit path, wherein the third chopper device is controlled by a third clock signal, which has a third frequency.