Title :
LVDS I/O buffers with a controlled reference circuit
Author :
Gabara, Thaddeus ; Fischer, Wilhelm ; Werner, W. ; Siegel, Stefan ; Kothandaraman, Makeshwar ; Metz, Peter ; Gradl, Dave
Author_Institution :
Lucent Technol., AT&T Bell Labs., Murray Hill, NJ, USA
Abstract :
A controlled reference circuit maintains the output voltage levels and current values of an LVDS output buffer constant over (PVT) processing, voltage supply, and temperature variations. The reference circuit requires one external resistor and generates two DC control voltages which are applied to all output buffers. An on-chip resistance is described which maintains a tightly controlled impedance of approximately 100 Ω over the common mode range of 0 to 2.4 V. A measured waveform at 1.244 Gb/s is given
Keywords :
application specific integrated circuits; buffer circuits; reference circuits; voltage control; 0 to 2.4 V; 1.244 Gbit/s; 100 ohm; DC control voltage; LVDS I/O buffer; PVT processing; common mode range; controlled reference circuit; external resistor; impedance; on-chip resistance; temperature variation; voltage supply; waveform; CMOS technology; Capacitance; DC generators; Electrical resistance measurement; Impedance; Integrated circuit interconnections; Resistors; Switches; Temperature control; Voltage control;
Conference_Titel :
ASIC Conference and Exhibit, 1997. Proceedings., Tenth Annual IEEE International
Conference_Location :
Portland, OR
Print_ISBN :
0-7803-4283-6
DOI :
10.1109/ASIC.1997.617028
