Double-Sampler High-Linearity Receiver

Overview

Sampling-mixer front-end with time-domain processing and adjustable inter-sample delta to expand in-band and blocker tolerance.

Status: Tapeout complete • Area: Time-Domain RX • Leads: Sreeni, Dipan

Time-domain RX architecture that uses a double sampler feeding a VCO-based VTC and flash TDC, decoupling sensitivity from supply-limited analog gain for higher in-band linearity.
Implements two-stage filtering—windowed integration/sampling plus a time-domain PLL with voltage feedback—for strong blocker tolerance and improved out-of-band linearity.
Wideband operation from 1.9–4 GHz with a reconfigurable 4–6 MHz baseband bandwidth; fabricated in 65 nm with ~0.71 mm² area.
Measured performance: P1dB ≈ −6 dBm, in-band IIP3 ≈ +4 dBm, OOB IIP3 ≈ +10 dBm, at ~18 mW power.

See Publications for related papers.

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