US 12,244,278 B2 · Capacitive amplifier with low kickback from switchable feedback capacitors

Abstract

A capacitive amplifier device and technique for mitigating the perturbation within the switchable terminals of a feedback capacitor which is produced by the switching activity performed as part of the device's operation. The capacitive amplifier contains feedback components which can be switched without producing significant kickback or poorly behaved transitions due to the inclusion of at least one dedicated circuit. The dedicated circuit is a kickback limiter circuitry which is connected to a switchable node and is designed to reduce the kickback. The technique for reducing the kickback produced can be achieved by connecting and activating the kickback limiter circuitry.

Claims20

Dependent claims

Capacitive amplifier circuitry with a switchable first feedback network, the capacitive amplifier circuitry including a first amplifier circuit stage having a first amplifier stage first output and a second amplifier circuit stage, coupled to the first amplifier stage first output, having a second amplifier stage first output, the capacitive amplifier circuitry comprising:

a first switchable node, coupled to a switchable first feedback component by a first switch controlled by a first clock signal and in a first capacitive feedback path between the second amplifier circuit stage and the first amplifier circuit stage;
and
a first kickback limiter circuitry, coupled to the first switchable node and configured to reduce a kickback produced by a first output switch and configured to hold a voltage level at the first switchable node and configured to isolate from the first switchable node.

Dependencies are inferred from the claim text.

Capacitive amplifier with low kickback from switchable feedback capacitors

Life of this patent

Capacitive amplifier with low kickback from switchable feedback capacitors

Life of this patent

Abstract

Claims20