US 2006/0132192 A1 · High speed analog envelope detector

Abstract

A high speed analog transmission envelope (data-validity) detector for detecting the validity or invalidity of received data by generating (and comparing) first through fourth level-shifted signals based on a pair of differential input signals that are externally applied (received). Each of the first through fourth level-shifted signals has voltage levels different from (e.g., higher than) the differential input signals. After comparing the first through fourth level-shifted signals with each other, the comparison results are used in determining the validity of the differential input signals (data). The analog transmission envelope (data) detector flexibly adapts to variations in common mode voltage, and simplifies the circuit architecture because it does not require an additional reference voltage for determining the validity of received data.

Claims24

Dependent claims

A data detector comprising:

a first level shifter configured to generate first and second level-shifted signals based on a first differential input signal applied from an external device, wherein the first level-shifted signal has a voltage level higher than the first differential input signal, and the second level-shifted signal has a voltage level higher than the first level-shifted signal;
and
a second level shifter configured to generate third and fourth level-shifted signals based on a second differential input signal applied from an external device, wherein the fourth level-shifted signal has a voltage level higher than the second differential input signal, and the third level-shifted signal has a voltage level higher than the fourth level-shifted signal.

Dependencies are inferred from the claim text.

High speed analog envelope detector

Life of this patent

High speed analog envelope detector

Life of this patent

Abstract

Claims24