A current-mode-logic-based frequency divider with ultra-wideband and octet phases

Si Da Tang, Yu Sheng Lin, Wei Hsiang Huang, Chun Lin Lu, Yeong-Her Wang

Research output: Contribution to journalArticle

Abstract

This paper presents a comprehensive analysis of a current-mode-logic frequency divider (CML FD) and the theoretical locking range of CML FD. The locking range of the CML divider is proportional to the injection ratio. By adding a resistive load, the locking range of the CML divider is not limited by the Q value of the LC resonant circuit. The minimum input power to drive the divider is achieved when the output frequency is equal to the self-oscillation frequency. To verify the properties of wideband and multi-phase outputs, the ÷4 octet-phase frequency divider based on a two-stage CML FD was implemented using a 0.18 μm CMOS process. It has a locking range of 1GHz to 8GHz with a 12.6mW dc power consumption, and the phase deviation between the octet output signals is less than 4.7°. With an ultra-wide frequency bandwidth and accurate octet outputs, the proposed divider is suitable for multi-phase generator applications.

Original languageEnglish
Pages (from-to)89-98
Number of pages10
JournalProgress In Electromagnetics Research M
Volume68
Publication statusPublished - 2018 Jan 1

Fingerprint

frequency dividers
Emitter coupled logic circuits
dividers
octets
Ultra-wideband (UWB)
locking
logic
broadband
Resonant circuits
output
Electric power utilization
phase deviation
Bandwidth
self oscillation
CMOS
generators
injection
bandwidth

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Tang, Si Da ; Lin, Yu Sheng ; Huang, Wei Hsiang ; Lu, Chun Lin ; Wang, Yeong-Her. / A current-mode-logic-based frequency divider with ultra-wideband and octet phases. In: Progress In Electromagnetics Research M. 2018 ; Vol. 68. pp. 89-98.
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abstract = "This paper presents a comprehensive analysis of a current-mode-logic frequency divider (CML FD) and the theoretical locking range of CML FD. The locking range of the CML divider is proportional to the injection ratio. By adding a resistive load, the locking range of the CML divider is not limited by the Q value of the LC resonant circuit. The minimum input power to drive the divider is achieved when the output frequency is equal to the self-oscillation frequency. To verify the properties of wideband and multi-phase outputs, the ÷4 octet-phase frequency divider based on a two-stage CML FD was implemented using a 0.18 μm CMOS process. It has a locking range of 1GHz to 8GHz with a 12.6mW dc power consumption, and the phase deviation between the octet output signals is less than 4.7°. With an ultra-wide frequency bandwidth and accurate octet outputs, the proposed divider is suitable for multi-phase generator applications.",
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A current-mode-logic-based frequency divider with ultra-wideband and octet phases. / Tang, Si Da; Lin, Yu Sheng; Huang, Wei Hsiang; Lu, Chun Lin; Wang, Yeong-Her.

In: Progress In Electromagnetics Research M, Vol. 68, 01.01.2018, p. 89-98.

Research output: Contribution to journalArticle

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