Continuous-Time Pipelined Analog-to-Digital Converters - Where Filtering Meets Analog-to-Digital Conversion

by Prof. Shanti Pavan (Indian Institute of Technology, Madras)

Friday 13 Sept 2024, 11:00 → 12:00 Europe/Zurich

13/2-005 (CERN)

HYBRID SEMINAR IN 13-2-005 AND ZOOM

Abstract:

If someone told you that a mixed-signal block's power, noise, distortion, and area could all be reduced simultaneously, you'd probably think this was a lie. It turns out that it is indeed possible sometimes - and this talk will present an example called the continuous-time pipeline (CTP) ADC. The CTP is an emerging technique that combines filtering with analog-to-digital conversion. Like a continuous-time delta-sigma modulator (CTDSM), a CTP has a "nice" input impedance that is easy to drive and has inherent anti-aliasing. However, unlike a CTDSM, a CTP does not require a high-speed feedback loop to be closed. As a result, it can achieve significantly higher bandwidth (like a Nyquist ADC). After discussing the operating principles behind the CTP, we describe the fundamental benefits of the CTP over a conventional signal chain that incorporates an anti-alias filter and a Nyquist-rate converter. We will then show design details and measurement results from a 12-bit ENOB, 100MHz 800MS/s CTP designed in a 65nm CMOS process.

Zoom details are also in the invitation email.

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