Switched capacitor circuits

The device of claim 10, wherein the device includes:

• a comparator having a first comparator input coupled to the first input of the amplifier and a second comparator input coupled to the second input of the amplifier;
• a successive approximation register (SAR) having a SAR input coupled to a comparator output of the comparator;
• and
• an analog-to-digital converter (ADC) coupled to the SAR, coupled to the input capacitor structure via a third switch, and coupled to the second input capacitor structure via a fourth switch.

A method of noise reduction in a sampling structure, the method comprising:

• operating a set of switches arranged with respect to an amplifier to capture scaled thermal noise estimation on an output capacitor structure coupled to the amplifier, during an acquisition phase in which a voltage signal is input to an input capacitor structure coupled to the amplifier;
• operating the set of switches, in a conversion phase following the acquisition phase, to provide an output voltage from an output of the output capacitor structure without the scaled thermal noise estimation generated in the acquisition phase;
• and
• synchronously actuating a first switch and a second switch of the set of switches, with the first switch arranged on an input side of the amplifier and the second switch arranged on an output side of the amplifier to control the acquisition phase and the conversion phase.

A device having a sampling structure, the device comprising:

• a first means for storing charge;
• a second means for storing charge;
• a means for amplifying a signal;
• a means for capturing thermal noise on an input of the means for amplifying a signal during an acquisition phase in which a voltage signal is input to the first means for storing charge, with the means for capturing thermal noise being arranged on an input side of the means for amplifying a signal;
• and
• a means for cancelling scaled thermal noise, generated during the acquisition phase from the means for amplifying a signal, from an output of the second means for storing charge during a conversion phase, with the means for cancelling scaled thermal noise arranged on the output side of the means for amplifying a signal, with the means for capturing thermal noise and the means for cancelling scaled thermal noise being arranged for synchronous correlated actuation.

A device arranged for cancellation or compensation of scaled thermal noise in a conversion phase from capture of the scaled thermal noise in an acquisition phase, the device comprising:

• an amplifier having an amplifier input and an amplifier output;
• an input capacitor structure coupled to the amplifier input;
• an output capacitor structure coupled to the amplifier output;
• a first switch coupled to the amplifier input;
• and
• a second switch coupled to the output capacitor structure with the output capacitor structure between the second switch and the amplifier output, with the first and second switches arranged for synchronous correlated actuation.

A method of cancellation or compensation of scaled thermal noise in a conversion phase of a device having a capacitive sampling structure from capture of the scaled thermal noise in an acquisition phase, the method comprising:

• closing a first switch coupled to an amplifier input of an amplifier of the device with the amplifier input coupled to an input capacitor structure:
• closing a second switch coupled to an output capacitor structure with the output capacitor structure between the second switch and an output of the amplifier;
• opening the first switch after the first switch has been closed for a first time interval;
• and
• opening the second switch after the second switch has been closed for the first time interval, with the first and second switches operated with synchronous correlated actuation of closing and opening.