Method and apparatus for reference voltage calibration in a single-ended receiver

摘要

According to at least one example embodiment, a method and corresponding system, or circuit, for calibrating a reference voltage of a single-ended receiver, include applying a clock signal and a reference voltage signal as inputs to the differential amplifier of the single-ended receiver. The differential amplifier provides an output signal, the output signal is processed, and an indication of a duty cycle associated with an output signal of the amplifier is evaluated. Based on the evaluated indication of the duty cycle, a control logic module, or circuit, adjusts a level of the reference voltage signal. The process of evaluating the indication of the duty cycle and adjusting the reference voltage level is repeated for a number of iterations.

主权项

1. A method of calibrating a reference voltage of a single-ended receiver, the method comprising:
applying a clock signal and a reference voltage signal as inputs to a differential amplifier of the single-ended receiver; evaluating an indication of a duty cycle associated with an output signal of the differential amplifier; adjusting, by control logic configured to apply a binary search, a level of the reference voltage signal based on the evaluated indication of the duty cycle; and repeating said evaluating and said adjusting over a number of iterations.