Title :
A super-regenerative ASK receiver with ΔΣ pulse-width digitizer and SAR-based fast frequency calibration for MICS applications
Author :
Liu, Yao-Hong ; Liu, Hui-Hsien ; Lin, Tsung-Hsien
Author_Institution :
Graduate Institute of Electronics Engineering and Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
Abstract :
This paper presents a 400MHz super-regenerative receiver (SR-RX) with a proposed ΔΣpulse-width digitizer (ΔΣ-PWD) and a SAR-based fast frequency calibration (SAR-FFC). The ΔΣ-PWD can be considered as a PW-domain counterpart of a conventional ΔΣ modulator. It achieves high-resolution PW-to-digital conversion. The SAR-FFC enables rapid setting of the oscillator frequency to the MICS band. Fabricated in a 0.18µm CMOS process, this RX draws 700µA from a 1.3V supply. With a 156kbps data rate, the RX achieves an energy efficiency of 5.8nJ/bit and −80dBm sensitivity. The measured frequency calibration time is around 1.5µs.
Keywords :
Amplitude shift keying; Calibration; Clocks; Energy efficiency; Envelope detectors; Frequency; Jitter; Microwave integrated circuits; Oscillators; Space vector pulse width modulation;
Conference_Titel :
VLSI Circuits, 2009 Symposium on
Conference_Location :
Kyoto, Japan
Print_ISBN :
978-1-4244-3307-0
Electronic_ISBN :
978-4-86348-001-8
