Title :
A direct-skew-detect synchronous mirror delay for application-specific integrated circuits
Author :
Saeki, Takanori ; Minami, Koichiro ; Yoshida, Hiroshi ; Suzuki, Hisamitsu
Author_Institution :
NEC Corp., Kanagawa, Japan
fDate :
3/1/1999 12:00:00 AM
Abstract :
A nonfeedback CMOS digital-clock-generator, direct-skew-detect synchronous-mirror-delay (direct SMD) circuit has been developed that achieves clock-skew suppression in only two clock cycles for application-specific integrated circuits having unfixed and various clock paths. The direct SMD circuit detects both clock skew and clock cycle by using a direct-skew detector and clock-suspension circuitry. The skew-detection scheme removes the phase errors caused by delay in the clock-driver circuit. Measurements demonstrated that the direct SMD circuit eliminates various amounts of clock skew (2.0-3.0 ns) at 200 MHz in two clock cycles
Keywords :
CMOS digital integrated circuits; application specific integrated circuits; clocks; delay circuits; detector circuits; timing circuits; 200 MHz; ASIC; CMOS digital clock generator; application-specific integrated circuits; clock cycle; clock-driver circuit; clock-skew suppression; clock-suspension circuitry; direct-skew detector; nonfeedback clock generator; phase errors elimination; synchronous mirror delay; Application specific integrated circuits; CMOS digital integrated circuits; Clocks; Delay effects; Delay lines; Driver circuits; Feedback circuits; Mirrors; Phase locked loops; Switches;
Journal_Title :
Solid-State Circuits, IEEE Journal of
