Publication detail

Arbitrarily Tunable Phase Shift in Low-Frequency Multiphase Oscillator

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

1

Pages to

11

Pages count

11

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"
}