CIRCUIT ARCHITECTURE FOR MODE SWITCH

摘要

Present disclosure relates to a current detection module capable of differentiating and quantifying contribution to a current signal generated by a sensor in response to stimulation by a certain target source from contributions from sources other than the target source (ambient sources). As long as the contribution from the target source comprises a pulsed signal, the module synchronizes itself to the pulse(s) so that there is a predetermined phase relationship between the pulse(s) and functions carried out by various stages of the module. The module may be re-used to also detect and quantify contributions from ambient sources by presenting these contributions to the module as pulses that trigger synchronization of the module. To that end, a detection system disclosed herein is based on the use of such current detection module and allows mode switching where, depending on the selected mode of operation, the module is configured to perform different measurements.

主权项

1. A detection system comprising:
a sensor configured to generate a current signal, the current signal comprising at least a first portion comprising a contribution from a target source and/or a second portion comprising a contribution from one or more sources other than the target source; a current detection module configured to receive the current signal generated by the sensor and generate a digital value indicative of the first portion of the current signal and/or a digital value indicative of the second portion of the current signal; and a mode switch configured to set the current detection module to operate in one of a first mode, a second mode, and a third mode, wherein:
in the first mode, the current detection module is configured to generate the digital value indicative of the first portion,in the second mode, the current detection module is configured to generate the digital value indicative of at least the second portion when the contribution from the one or more sources other than the target source is in a first range of values, andin the third mode, the current detection module is configured to generate the digital value indicative of at least the second portion when the contribution from the one or more sources other than the target source is in a second range of values, the second range of values having an upper end higher than an upper end of the first range of values.