Current adjustable clock distribution network scheme for GDDR5. Issue 11 (1st May 2013)

• Record Type: Journal Article
• Authors: Lim, S.‐B.; Hwang, S.; You, J.; Baek, Y.; Kim, C.
• Is Part Of: Electronics letters. Volume 49:Issue 11(2013)
• Page Start: 689
• Page End: 691
• Publication Date: 2013-05-01
• Subjects: buffer circuits -- CMOS logic circuits -- current distribution -- current‐mode logic -- driver circuits -- clock distribution networks; current adjustable clock distribution network scheme -- GDDR5 -- current mode logic buffer -- wide‐frequency range -- CML buffer -- conventional buffer current dissipation -- constant current consumption -- global driver -- CMOS technology -- clock frequency -- size 65 nm -- power 10.26 mW; buffer circuits -- CMOS logic circuits -- current distribution -- current‐mode logic -- driver circuits -- clock distribution networks; current adjustable clock distribution network scheme -- GDDR5 -- current mode logic buffer -- wide‐frequency range -- CML buffer -- conventional buffer current dissipation -- constant current consumption -- global driver -- CMOS technology -- clock frequency -- size 65 nm -- power 10.26 mW; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2012.3859
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : Presented is a current adjustable clock distribution network for GDDR5. In general, GDDR5 uses a current mode logic (CML) buffer as the global driver of the clock distribution. The wide‐frequency range conventional CML buffer is designed to the fastest frequency. However, the CML buffer consumes constant current at all frequencies. For this reason, the conventional buffer dissipates current more than necessary at low frequencies. A proposed current adjustable clock distribution network scheme adjusts the amount of the current consumption of the global driver according to the clock frequency. The proposed scheme is implemented in 65 nm CMOS technology, reduces power consumption by 17.7% in the wide frequency range from an average 10.26 mW of the conventional scheme to 8.44 mW.