US 12,244,278 B2
Capacitive amplifier with low kickback from switchable feedback capacitors
Gerard Mora-Puchalt, Catarroja (ES); Italo Carlos Medina Sánchez Castro, Valencia (ES); and Jesús Bonache Martinez, Mutxamel (ES)
Assigned to Analog Devices International Unlimited Company, Limerick (IE)
Filed by Analog Devices International Unlimited Company, Limerick (IE)
Filed on Mar. 1, 2022, as Appl. No. 17/684,288.
Prior Publication US 2023/0283251 A1, Sep. 7, 2023
Int. Cl. H03F 3/45 (2006.01)
CPC H03F 3/45475 (2013.01) 20 Claims
OG exemplary drawing
 
1. 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.