US 12,149,246 B2
Circuit arrangement and method for charge integration
Andreas Fitzi, Staefa (CH)
Assigned to ams International AG, Jona (CH)
Appl. No. 17/634,259
Filed by ams International AG, Jona (CH)
PCT Filed Jul. 24, 2020, PCT No. PCT/EP2020/070956
§ 371(c)(1), (2) Date Feb. 10, 2022,
PCT Pub. No. WO2021/028195, PCT Pub. Date Feb. 18, 2021.
Claims priority of application No. 19191721 (EP), filed on Aug. 14, 2019.
Prior Publication US 2022/0321130 A1, Oct. 6, 2022
Int. Cl. H03K 21/02 (2006.01); G01T 1/24 (2006.01); G01T 1/36 (2006.01); H03K 21/08 (2006.01)
CPC H03K 21/023 (2013.01) [G01T 1/247 (2013.01); G01T 1/366 (2013.01); H03K 21/08 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A circuit arrangement for charge integration, wherein the circuit arrangement comprises:
a first input configured to apply a signal representing charge pulses;
a first output configured to provide an integrated signal;
an integrating circuit connected between the first input and the first output, wherein the integrating circuit comprises a resistive circuit and a capacitor and having an RC time constant which is a function of the resistive circuit and the capacitor; and
a feedback control circuit connected, at a second input, to the first output of the circuit arrangement and configured to provide, at a second output, a control signal;
wherein at least one of the resistive circuit and the capacitor has a variable value based on the control signal,
wherein the control signal is an analog signal.