Title :
New 12-bit source-follower track-and-hold circuit suitable for high-speed applications
Author :
Campos, Marcel Veloso ; Fortunato, André Luís ; Filho, Carlos Alberto dos Reis
Abstract :
An analysis of a cascode source-follower with all transistors operating in saturation mode is presented. The new structure provides means to mitigate the effects of nonlinearities caused by transistor capacitances. It is also studied the effects of adding a sampling switch at the output of the source-follower. Performance results of 0.35μm CMOS implementation and dimensioning methodology of the resulting source sampling circuit is presented along the text. The circuit achieves more than 12 bits of linearity in the frequencies from 0 to 100MHz while consuming 10mW.
Keywords :
CMOS analogue integrated circuits; MOSFET; sample and hold circuits; CMOS implementation; cascode source-follower analysis; frequency 0 MHz to 100 MHz; high-speed application; power 10 muW; sampling circuit; sampling switch; saturation mode; size 0.35 mum; source-follower track-and-hold circuit; transistor capacitance; word length 12 bit; Bandwidth; CMOS integrated circuits; Capacitance; Integrated circuit modeling; Linearity; Threshold voltage; Transistors; harmonic distortion; source sampling; source-follower; voltage buffer;
Conference_Titel :
VLSI and System-on-Chip (VLSI-SoC), 2011 IEEE/IFIP 19th International Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4577-0171-9
Electronic_ISBN :
978-1-4577-0169-6
DOI :
10.1109/VLSISoC.2011.6081655
