Přístupnostní navigace
E-application
Search Search Close
Publication detail
ŠOTNER, R. POLÁK, L. JEŘÁBEK, J. JAIKLA, W.
Original Title
Arbitrarily Tunable Phase Shift in Low-Frequency Multiphase Oscillator
Type
journal article in Web of Science
Language
English
Original Abstract
A special electronically tunable multiphase oscillator with arbitrarily and continuously adjustable phase shifts is introduced. Our design assumes to set the phase around the asymptotical limit of 180.. These features cannot be easily achieved in a standard way, i.e., any simple single-phase oscillator supplemented by a first-order adjustable all-pass (AP) section (shifter). The proposed design uses an electronically linearly tunable quadrature oscillator with a frequency range from 0.98 up to 12.54 kHz. It also offers multiples of 45. as the initial setting of the phase shift tuning region. The example of operation shows the adjustment of the phase shift at a specific frequency (10 kHz) within the range of +/- 45 degrees. and around -180 degrees, -135 degrees, and -90 degrees. This variability is not available in standard cases without the use of several AP sections. The current value of the phase shift of the presented oscillator is electronically controlled and does not influence the oscillation frequency and condition of oscillation. Output levels of produced signals are not influenced by this tuning process and are in the range of several hundreds of mV. Two applications of the oscillator are proposed. The first one focuses on low-bitrate modulation systems [phase shift keying (PSK)] while in the second one, our circuit represents a source of phase-adjustable signals in acoustic experiments. Discrete passive elements and active devices (special multipliers having current output terminals, unity-gain differential voltage buffers) fabricated in 0.35 mu m I3T25 ON Semiconductor 3.3 V CMOS process are used in experimental verification.
Keywords
All-pass (AP) filter; arbitrary phase shift; electronic adjustment; multiphase; multiplier; oscillator; quadrature
Authors
ŠOTNER, R.; POLÁK, L.; JEŘÁBEK, J.; JAIKLA, W.
Released
29. 5. 2023
Publisher
IEEE
Location
PISCATAWAY
ISBN
0018-9456
Periodical
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
Year of study
72
Number
1
State
United States of America
Pages from
Pages to
11
Pages count
URL
https://ieeexplore.ieee.org/document/10138531
Full text in the Digital Library
http://hdl.handle.net/11012/214350
BibTex
@article{BUT184275, author="Roman {Šotner} and Ladislav {Polák} and Jan {Jeřábek} and Winai {Jaikla}", title="Arbitrarily Tunable Phase Shift in Low-Frequency Multiphase Oscillator", journal="IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT", year="2023", volume="72", number="1", pages="1--11", doi="10.1109/TIM.2023.3280514", issn="0018-9456", url="https://ieeexplore.ieee.org/document/10138531" }