公开(公告)号：US10483927B2

公开(公告)日：2019-11-19

申请号：US15856050

申请日：2017-12-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Aditya Sundar ,  Jasjot Singh Chadha

IPC: H03F3/217 ,  H03F3/183 ,  H03F3/45 ,  H03F1/08 ,  H03F1/34 ,  H03F3/187

Abstract: In some examples, an amplifier comprises a first integrator to receive a differential input signal, a second integrator coupled to the first integrator, a third integrator coupled to the second integrator, and a comparator to receive outputs of the second and third integrators, to compare each of the outputs to a reference signal that is below a power supply rail voltage supplied to the amplifier, and to produce an error current based on the comparison. The amplifier also comprises a feedback connection between the comparator and inputs to the second integrator. The feedback connection injects the inputs to the second integrator with a current that is determined at least in part by the error current.