FEEDBACK NETWORK FOR LOW-DROP-OUT GENERATOR

摘要

A circuit may include a differential amplifier and a feedback network. The feedback network may have a chain of resistance sets coupled in series, with a first end terminal coupled to an output terminal of the differential amplifier and a second end terminal coupled to a power reference terminal of the differential amplifier. Respective nodes may be coupled between successive ones of the resistance sets. A feedback terminal may be coupled to an inverting input terminal of the differential amplifier. A controller may control a set of switches to electrically couple a given node to the feedback terminal. A first resistance set of the chain adjacent the first end terminal may be two resistance subsets coupled in series, with an intermediate node coupled therebetween. A programmable current generator may have a current output coupled to the intermediate node and may produce a controlled current flowing at the current output terminal.

主权项

1. A circuit, comprising:
a chain of resistance sets coupled in series and having a first end terminal and a second end terminal; respective nodes coupled between successive ones of the resistance sets; a feedback terminal; a set of switches capable of electrically coupling a given node to the feedback terminal; a first resistance set of the chain adjacent the first end terminal comprising two resistance subsets coupled in series, with an intermediate node coupled between the two resistance subsets; and a first programmable current generator having a current output terminal coupled to the intermediate node and being configured to produce a controlled value of current flowing at the current output terminal.