Paper Info
Title
A Supply Pushing Reduction Technique for <italic>LC</italic> Oscillators Based on Ripple Replication and Cancellation
Abstract
In this paper, we propose a method to suppress supply pushing of an <italic xmlns:xlink="http://www.w3.org/1999/xlink">LC</italic> oscillator such that it may directly operate from a switched-mode dc–dc converter generating fairly large ripples. A ripple replication block (RRB) generates an amplified ripple replica at the gate terminal of the tail current source to stabilize the oscillator’s tail current and thus its oscillating amplitude. The parasitic capacitance of the active devices and correspondingly the oscillation frequency are stabilized in turn. A calibration loop is also integrated on-chip to automatically set the optimum replication gain that minimizes the variation of the oscillation amplitude. A 4.9–5.6-GHz oscillator is realized in 40-nm CMOS and occupies 0.23 mm <sup xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> while consuming 0.8–1.3 mW across the tuning range (TR). The supply pushing is improved to <1 MHz/V resulting in a low < −49-dBc spur due to 0.5–12-MHz sinusoidal supply ripples as large as 50 mV <sub xmlns:xlink="http://www.w3.org/1999/xlink">pp</sub> . We experimentally verify the effectiveness of the proposed technique also in face of saw-tooth, multi-tone, and modulated supply ripples.
Year
DOI
Venue
2019
10.1109/JSSC.2018.2871195
IEEE Journal of Solid-State Circuits
Keywords
Field
DocType
Oscillators,Tracking loops,Logic gates,Delays,Transistors,Switches,Frequency conversion
Electronic oscillator,Oscillation,Logic gate,Parasitic capacitance,Current source,Computer science,Control theory,CMOS,Ripple,Transistor
Journal
Volume
Issue
ISSN
54
1
0018-9200
Citations 
PageRank 
References 
1
0.35
0
Authors
7
Name
Order
Citations
PageRank
Yue Chen115039.62
Yao-Hong Liu220133.59
Zhirui Zong3212.41
Johan Dijkhuis4144.80
Guido Dolmans542453.52
Robert Bogdan Staszewski653693.76
Masoud Babaie719525.05