Title :
A PVT-insensitive CMOS output driver with constant slew rate
Author :
Choi, Seok-Woo ; Park, Hong-June
Author_Institution :
High Speed CMOS IC Lab., Pohang Univ. of Sci. & Technol., South Korea
Abstract :
In this paper, we propose an output driver which has constant slew rate over PVT variation. To make output driver´s slew rate to be constant, rising and failing time of pre-driving node of output driver is kept constant by predriver, which has constant pull-up and pull-down path resistance. To make output voltage swing level to be constant, another replica bias circuit was used with CMOS push-pull output driver. HSPICE simulations show that the slew rate is 3.21 V/nS on fast condition and 3.12V/nS on slow condition with 1.4K pre-driver´s path resistance. This circuit was implemented with 0.18 μm CMOS process.
Keywords :
CMOS integrated circuits; SPICE; circuit simulation; device drivers; driver circuits; HSPICE simulations; PVT-insensitive CMOS output driver; constant output voltage swing level; constant path resistance; constant slew rate; eye diagrams; predriver; push-pull output driver; replica bias circuit; signal integrity; slew control method; Circuit noise; Delay effects; Driver circuits; MOS capacitors; MOSFETs; Noise reduction; Switches; Switching circuits; Transistors; Voltage;
Conference_Titel :
Advanced System Integrated Circuits 2004. Proceedings of 2004 IEEE Asia-Pacific Conference on
Print_ISBN :
0-7803-8637-X
DOI :
10.1109/APASIC.2004.1349423
