Voltage threshold calibration techniques for level detectors

摘要

Some embodiments relate to a level detector, comprising a current mirror including first and second current legs to carry first and second signals, respectively. The first current leg includes a first variable resistor and the second current leg includes a second variable resistor. During a calibration mode, a switching element provides a predetermined reference voltage across first and second control terminals of the first and second variable resistors, respectively. During a non-calibration mode, the switching element decouples the predetermined reference voltage from the first and second control terminals, and provides a signal across the first and second control terminals. Other embodiments are also disclosed.

主权项

1. A level detector, comprising:
a current mirror including first and second current legs to carry first and second signals, respectively, wherein the first current leg includes a first variable resistive component and wherein the second current leg includes a second variable resistive component; and a switching element adapted to provide, during a calibration mode, a non-zero predetermined reference voltage difference across first and second control terminals of the first and second variable resistive components; and further configured to, during a non-calibration mode, provide a signal across the first and second control terminals.