High speed wide tuning range multi-phase output ring oscillator

Details High speed wide tuning range multi-phase output ring oscillator High speed wide tuning range multi-phase output ring oscillator

1999-01-29

2000-06-13

Grimm, Siegfried H.

Oscillators

Ring oscillators

331 50, 331 56, 331177R, H03B 502

Patent

active

060754192

ABSTRACT:
A ring oscillator comprising: a plurality of sub-feedback loops, each comprising a pair of serially connected inverters and a feedback inverter having its input coupled to the output of the pair of inverters and its output connected to the input of the pair of inverters, the pairs of inverters being connected in a ring, and a downstream inverter of each respective pair of inverters forming an upstream inverter of an immediately following pair of inverters.

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patent: 5896068 (1999-04-01), Moyal
A.W. Buchwald, K.W. Martin, A.K. Oki and K.W. Kobayashi, "A 6-GHz integrated phase-locked loop using A1GaAs/GaAs heterojunction bipolar transistors," IEEE J. Solid-State Circuits, vol. 27, No. 12, pp 1752-1762, Dec. 1992.
B. Kim, D.N. Helman and P.R. Gray, "A 30 MHz hybrid analog/digital clock recovery circuit in 2-um CMOS," IEEE J. Solid-State Circuits, vol. 25, No. 6, pp. 1385-1394, Dec. 1990.
J.G. Maneatis and M.A. Horowitz, "Precise delay generation using coupled oscillators," IEEE J. Solid-State Circuits, vol. 28, No. 12, pp. 1273-1283, Dec. 1993.
S.J. Lee, B. Kim and K. Lee, "A novel high-speed ring oscillator for multiphase clock generation using negative skewed delay scheme," IEEE J. Solid-State Circuits, vol. 32, pp. 289-291, Feb. 1997.

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