A 0.47-0.66 pJ/bit, 4.8-8 Gb/s I/O Transceiver in 65 nm CMOS

作者：Song Young Hoon^*; Bai Rui; Hu Kangmin; Yang Hae Woong; Chiang Patrick Yin; Palermo Samuel

来源：IEEE Journal of Solid-State Circuits, 2013, 48(5): 1276-1289.

DOI：10.1109/JSSC.2013.2249812

• High-speed I/O
• injection-locked oscillator
• low-power
• low-voltage regulator
• poly-phase filter
• transceiver
• voltage-mode driver

A low-power forwarded-clock I/O transceiver architecture is presented that employs a high degree of output/input multiplexing, supply-voltage scaling with data rate, and low-voltage circuit techniques to enable low-power operation. The transmitter utilizes a 4: 1 output multiplexing voltage-mode driver along with 4-phase clocking that is efficiently generated from a passive poly-phase filter. The output driver voltage swing is accurately controlled from 100-200 mV(ppd) using a low-voltage pseudo-differential regulator that employs a partial negative-resistance load for improved low frequency gain. 1:8 input de-multiplexing is performed at the receiver equalizer output with 8 parallel input samplers clocked from an 8-phase injection-locked oscillator that provides more than 1UI de-skew range. In the transmitter clocking circuitry, per-phase duty-cycle and phase-spacing adjustment is implemented to allow adequate timing margins at low operating voltages. Fabricated in a general purpose 65 nm CMOS process, the transceiver achieves 4.8-8 Gb/s at 0.47-0.66 pJ/b energy efficiency for V-DD = 0.6-0.8 V.

• 出版日期2013-5