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This paper presents an all-digital low-voltage-differential-signaling (LVDS) driver design for Serial Advanced Technology Attachment II. A simultaneous-switching-noise reduction technique and an autocalibration mechanism are implemented to suppress switching noise and to handle process and environmental variations. The circuit is implemented in a 0.18-mum 1P6M CMOS process with a core area of 0.072 mm2. At 3 Gbps, it consumes 9 mW of power under a 1.8-V power supply or 3 pJ/bit.