This paper presents a differential input, two-stage structure sample-hold-amplifier (SHA) for which each stage can be designed and adjusted separately to have a large input dynamic range and fast operation speed. The clock feed through and charge injection is eliminated. The implemented SHA with a 0.18um 1.8V process shows that it can sample a 2.5 MHz signal at 40 MHz with a 63dB SFDR and a -62 dB THD which is able to realize an ADC of 10 bit resolution.
Index Terms:
Sample-and-hold amplifier, Two-stage structure, Pipelined ADC, Bootstrapped switch, Bottom-plate sampling
Citation:
Jian Ruan, Chung Len Lee, "A Fast Two-Stage Sample-and-Hold Amplifier for Pipelined ADC Application," delta, pp.99-102, 4th IEEE International Symposium on Electronic Design, Test and Applications (delta 2008), 2008