Title :
A 5GS/s voltage-to-time converter in 90nm CMOS
Author :
Macpherson, Andrew R. ; Townsend, Kenneth A. ; Haslett, James W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Calgary, Calgary, AB, Canada
Abstract :
A voltage-to-time converter (VTC) is presented for use in a time-based analog-to-digital converter (ADC). The converter runs with a 5 GHz input clock to provide a maximum conversion rate of 5 GS/s. A novel architecture enables the VTC to provide an adjustable linear delay versus input voltage characteristic. The circuit is realized in a 90 nm CMOS process. After calibration, the converter achieves better than 3.7 effective bits for input frequencies up to 1.75 GHz, making it suitable for use in a time-based ADC with up to 4-bit resolution.
Keywords :
CMOS digital integrated circuits; analogue-digital conversion; delay circuits; field effect MMIC; CMOS process; frequency 5 GHz; linear delay; size 90 nm; time-based ADC; time-based analog-to-digital converter; voltage characteristics; voltage-to-time converter; Analog-digital conversion; CMOS analog integrated circuits; CMOS process; Calibration; Clocks; Delay lines; Pulse width modulation; Sampling methods; Space vector pulse width modulation; Voltage;
Conference_Titel :
Microwave Integrated Circuits Conference, 2009. EuMIC 2009. European
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4749-7
