Abstract: This paper describes an on-chip analog bus whose bandwidth is limited primarily by an off-chip amplifier. It uses only a digital 3-state inverter for each bus input. The high-speed and constant low-input capacitance of this scheme make it suitable for measuring sensitive or even digital signals. For equal silicon area, the signal bandwidth is demonstrated to be 10 to 40 times that of previously reported transmission gate schemes.
Index Terms:
mixed analogue-digital integrated circuits; integrated circuit design; design for testability; capacitance; analog test bus; on-chip analog bus; digital three-state inverter; low-input capacitance; signal bandwidth; bus input; IC design; DFT; mixed-signal circuits; 100 MHz
Citation:
S. Sunter, "A low cost 100 MHz analog test bus," vts, pp.0060, 13th IEEE VLSI Test Symposium (VTS'95), 1995