Patent ID: 7889579

Claim:
A data capture circuit comprising: a differential strobe signal including first and second single-ended strobe signals; a single-ended data signal; a reference voltage; a first differential amplifier having a first input for receiving the first single-ended strobe signal, a second input for receiving the reference voltage, and an output; a second differential amplifier having a first input for receiving the single-ended data signal, a second input for receiving the reference voltage, and an output; a third differential amplifier having a first input for receiving the second single-ended strobe signal, a second input for receiving the reference voltage, and an output; a first dual-cascode circuit having first and second P-channel transistors and first and second N-channel transistors with their respective current paths in cascode connection, a gate of the first P-channel transistor being coupled to the output of the first differential amplifier, a gate of the second P-channel transistor and the first N-channel transistor being coupled together and to the output of the second differential amplifier, and a gate of the second N-channel transistor being coupled to the output of the third differential amplifier, and an output for providing a rising data signal; and a second dual-cascode circuit having first and second P-channel transistors and first and second N-channel transistors with their respective current paths in cascade connection, a gate of the first P-channel transistor being coupled to the output of the first differential amplifier, a gate of the second P-channel transistor and the first N-channel transistor being coupled together and to the output of the second differential amplifier, and a gate of the second N-channel transistor being coupled to the output of the third differential amplifier, and an output for providing a falling data signal, wherein the rising and falling data signals are subsequently processed to provide falling edge zero, falling edge one, rising edge zero, and rising edge one data signals.