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An LDO-based supply referencing 10b 32MS/s pipelined ADC

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4 Author(s)
Chang-Kyo Lee ; Dept. of Electr. Eng., KAIST, Daejeon, South Korea ; Ji-Wook Kwon ; Sang-Hyun Cho ; Seung-Tak Ryu

A reference driver-free pipelined ADC with a low drop-out (LDO) regulator for power supply is proposed for SoC applications. An LDO-based regulated voltage provides not only power supply for digital and analog circuits but also works as a reference voltage for the ADC. Conventional residue function from a 2.5b/stage design can use its max input as much as 93% of the internal supply voltage. A prototype 10-bit 32MS/s ADC has been designed for a 0.18μm CMOS technology. Under a regulated 1.5V internal supply from an external 1.8V, the design shows 65.1dB SFDR with 7.06mA (including LDO) current consumption.

Published in:

Intelligent Radio for Future Personal Terminals (IMWS-IRFPT), 2011 IEEE MTT-S International Microwave Workshop Series on

Date of Conference:

24-25 Aug. 2011