Substrate coupled noise reduction and active noise suppression circuits for mixed-signal system-on-a-chip designs

Two novel high-bandwidth CMOS active suppression circuits are proposed to enhance conventional guard band structures. The circuits are compact and robust, and suitable for system-on-a-chip implementations. They compare favorably with previous designs. Experimental results indicated that sub-nanosecond switching noise pulses are attenuated up to 80% using our active suppression circuits.